drm/mgag200: Provide per-device callbacks for PIXPLLC

Move the PIXPLLC code into per-model source files and wire it up
with per-model callbacks. No functional changes.

The PIXPLLC pixel-clock is part of the CRTC, but really separate
hardware that varies with each model of the G200. Move the PIXPLLC
code for each model into the per-model source file and call it from
CRTC helpers via device functions.

This allows to remove struct mgag200_pll and the related code. The
new callbacks behave like the CRTC's atomic_check and atomic_enable
functions.

v3:
* clean up style

Signed-off-by: Thomas Zimmermann <[e-mail]>
Reviewed-by: Jocelyn Falempe <[e-mail]>
Tested-by: Jocelyn Falempe <[e-mail]>
Acked-by: Sam Ravnborg <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/mgag200/Makefile

···
 	mgag200_g200se.o \
 	mgag200_g200wb.o \
 	mgag200_i2c.o \
-	mgag200_mode.o \
-	mgag200_pll.o
+	mgag200_mode.o
 
 obj-$(CONFIG_DRM_MGAG200) += mgag200.o

drivers/gpu/drm/mgag200/mgag200_drv.h

···
 #define MGAG200_MAX_FB_WIDTH 4096
 
 struct mga_device;
-struct mgag200_pll;
 
 /*
  * Stores parameters for programming the PLLs
···
 	unsigned int n;
 	unsigned int p;
 	unsigned int s;
-};
-
-struct mgag200_pll_funcs {
-	int (*compute)(struct mgag200_pll *pll, long clock, struct mgag200_pll_values *pllc);
-	void (*update)(struct mgag200_pll *pll, const struct mgag200_pll_values *pllc);
-};
-
-struct mgag200_pll {
-	struct mga_device *mdev;
-
-	const struct mgag200_pll_funcs *funcs;
 };
 
 struct mgag200_crtc_state {
···
 	 * a new display mode.
 	 */
 	void (*enable_vidrst)(struct mga_device *mdev);
+
+	/*
+	 * Validate that the given state can be programmed into PIXPLLC. On
+	 * success, the calculated parameters should be stored in the CRTC's
+	 * state in struct @mgag200_crtc_state.pixpllc.
+	 */
+	int (*pixpllc_atomic_check)(struct drm_crtc *crtc, struct drm_atomic_state *new_state);
+
+	/*
+	 * Program PIXPLLC from the CRTC state. The parameters should have been
+	 * stored in struct @mgag200_crtc_state.pixpllc by the corresponding
+	 * implementation of @pixpllc_atomic_check.
+	 */
+	void (*pixpllc_atomic_update)(struct drm_crtc *crtc, struct drm_atomic_state *old_state);
 };
 
 struct mga_device {
···
 
 	enum mga_type			type;
 
-	struct mgag200_pll pixpll;
 	struct drm_plane primary_plane;
 	struct drm_crtc crtc;
 	struct drm_encoder encoder;
···
 struct mga_device *mgag200_g200se_device_create(struct pci_dev *pdev, const struct drm_driver *drv,
 						enum mga_type type);
 void mgag200_g200wb_init_registers(struct mga_device *mdev);
+void mgag200_g200wb_pixpllc_atomic_update(struct drm_crtc *crtc, struct drm_atomic_state *old_state);
 struct mga_device *mgag200_g200wb_device_create(struct pci_dev *pdev, const struct drm_driver *drv,
 						enum mga_type type);
 struct mga_device *mgag200_g200ev_device_create(struct pci_dev *pdev, const struct drm_driver *drv,
 						enum mga_type type);
 void mgag200_g200eh_init_registers(struct mga_device *mdev);
+void mgag200_g200eh_pixpllc_atomic_update(struct drm_crtc *crtc, struct drm_atomic_state *old_state);
 struct mga_device *mgag200_g200eh_device_create(struct pci_dev *pdev, const struct drm_driver *drv,
 						enum mga_type type);
 struct mga_device *mgag200_g200eh3_device_create(struct pci_dev *pdev, const struct drm_driver *drv,
···
 
 				/* mgag200_i2c.c */
 int mgag200_i2c_init(struct mga_device *mdev, struct mga_i2c_chan *i2c);
-
-				/* mgag200_pll.c */
-int mgag200_pixpll_init(struct mgag200_pll *pixpll, struct mga_device *mdev);
 
 #endif				/* __MGAG200_DRV_H__ */

drivers/gpu/drm/mgag200/mgag200_g200.c

···
 #include <linux/pci.h>
 #include <linux/vmalloc.h>
 
+#include <drm/drm_atomic.h>
 #include <drm/drm_drv.h>
 
 #include "mgag200_drv.h"
···
 	}
 
 	mgag200_init_registers(mdev);
+}
+
+/*
+ * PIXPLLC
+ */
+
+static int mgag200_g200_pixpllc_atomic_check(struct drm_crtc *crtc, struct drm_atomic_state *new_state)
+{
+	static const int post_div_max = 7;
+	static const int in_div_min = 1;
+	static const int in_div_max = 6;
+	static const int feed_div_min = 7;
+	static const int feed_div_max = 127;
+
+	struct drm_device *dev = crtc->dev;
+	struct mgag200_g200_device *g200 = to_mgag200_g200_device(dev);
+	struct drm_crtc_state *new_crtc_state = drm_atomic_get_new_crtc_state(new_state, crtc);
+	struct mgag200_crtc_state *new_mgag200_crtc_state = to_mgag200_crtc_state(new_crtc_state);
+	long clock = new_crtc_state->mode.clock;
+	struct mgag200_pll_values *pixpllc = &new_mgag200_crtc_state->pixpllc;
+	u8 testp, testm, testn;
+	u8 n = 0, m = 0, p, s;
+	long f_vco;
+	long computed;
+	long delta, tmp_delta;
+	long ref_clk = g200->ref_clk;
+	long p_clk_min = g200->pclk_min;
+	long p_clk_max = g200->pclk_max;
+
+	if (clock > p_clk_max) {
+		drm_err(dev, "Pixel Clock %ld too high\n", clock);
+		return -EINVAL;
+	}
+
+	if (clock < p_clk_min >> 3)
+		clock = p_clk_min >> 3;
+
+	f_vco = clock;
+	for (testp = 0;
+	     testp <= post_div_max && f_vco < p_clk_min;
+	     testp = (testp << 1) + 1, f_vco <<= 1)
+		;
+	p = testp + 1;
+
+	delta = clock;
+
+	for (testm = in_div_min; testm <= in_div_max; testm++) {
+		for (testn = feed_div_min; testn <= feed_div_max; testn++) {
+			computed = ref_clk * (testn + 1) / (testm + 1);
+			if (computed < f_vco)
+				tmp_delta = f_vco - computed;
+			else
+				tmp_delta = computed - f_vco;
+			if (tmp_delta < delta) {
+				delta = tmp_delta;
+				m = testm + 1;
+				n = testn + 1;
+			}
+		}
+	}
+	f_vco = ref_clk * n / m;
+	if (f_vco < 100000)
+		s = 0;
+	else if (f_vco < 140000)
+		s = 1;
+	else if (f_vco < 180000)
+		s = 2;
+	else
+		s = 3;
+
+	drm_dbg_kms(dev, "clock: %ld vco: %ld m: %d n: %d p: %d s: %d\n",
+		    clock, f_vco, m, n, p, s);
+
+	pixpllc->m = m;
+	pixpllc->n = n;
+	pixpllc->p = p;
+	pixpllc->s = s;
+
+	return 0;
+}
+
+static void mgag200_g200_pixpllc_atomic_update(struct drm_crtc *crtc,
+					       struct drm_atomic_state *old_state)
+{
+	struct drm_device *dev = crtc->dev;
+	struct mga_device *mdev = to_mga_device(dev);
+	struct drm_crtc_state *crtc_state = crtc->state;
+	struct mgag200_crtc_state *mgag200_crtc_state = to_mgag200_crtc_state(crtc_state);
+	struct mgag200_pll_values *pixpllc = &mgag200_crtc_state->pixpllc;
+	unsigned int pixpllcm, pixpllcn, pixpllcp, pixpllcs;
+	u8 xpixpllcm, xpixpllcn, xpixpllcp;
+
+	pixpllcm = pixpllc->m - 1;
+	pixpllcn = pixpllc->n - 1;
+	pixpllcp = pixpllc->p - 1;
+	pixpllcs = pixpllc->s;
+
+	xpixpllcm = pixpllcm;
+	xpixpllcn = pixpllcn;
+	xpixpllcp = (pixpllcs << 3) | pixpllcp;
+
+	WREG_MISC_MASKED(MGAREG_MISC_CLKSEL_MGA, MGAREG_MISC_CLKSEL_MASK);
+
+	WREG_DAC(MGA1064_PIX_PLLC_M, xpixpllcm);
+	WREG_DAC(MGA1064_PIX_PLLC_N, xpixpllcn);
+	WREG_DAC(MGA1064_PIX_PLLC_P, xpixpllcp);
 }
 
 /*
···
 }
 
 static const struct mgag200_device_funcs mgag200_g200_device_funcs = {
+	.pixpllc_atomic_check = mgag200_g200_pixpllc_atomic_check,
+	.pixpllc_atomic_update = mgag200_g200_pixpllc_atomic_update,
 };
 
 struct mga_device *mgag200_g200_device_create(struct pci_dev *pdev, const struct drm_driver *drv,

drivers/gpu/drm/mgag200/mgag200_g200eh.c

···
 // SPDX-License-Identifier: GPL-2.0-only
 
+#include <linux/delay.h>
 #include <linux/pci.h>
 
+#include <drm/drm_atomic.h>
 #include <drm/drm_drv.h>
 
 #include "mgag200_drv.h"
···
 }
 
 /*
+ * PIXPLLC
+ */
+
+static int mgag200_g200eh_pixpllc_atomic_check(struct drm_crtc *crtc,
+					       struct drm_atomic_state *new_state)
+{
+	static const unsigned int vcomax = 800000;
+	static const unsigned int vcomin = 400000;
+	static const unsigned int pllreffreq = 33333;
+
+	struct drm_crtc_state *new_crtc_state = drm_atomic_get_new_crtc_state(new_state, crtc);
+	struct mgag200_crtc_state *new_mgag200_crtc_state = to_mgag200_crtc_state(new_crtc_state);
+	long clock = new_crtc_state->mode.clock;
+	struct mgag200_pll_values *pixpllc = &new_mgag200_crtc_state->pixpllc;
+	unsigned int delta, tmpdelta;
+	unsigned int testp, testm, testn;
+	unsigned int p, m, n, s;
+	unsigned int computed;
+
+	m = n = p = s = 0;
+	delta = 0xffffffff;
+
+	for (testp = 16; testp > 0; testp >>= 1) {
+		if (clock * testp > vcomax)
+			continue;
+		if (clock * testp < vcomin)
+			continue;
+
+		for (testm = 1; testm < 33; testm++) {
+			for (testn = 17; testn < 257; testn++) {
+				computed = (pllreffreq * testn) / (testm * testp);
+				if (computed > clock)
+					tmpdelta = computed - clock;
+				else
+					tmpdelta = clock - computed;
+				if (tmpdelta < delta) {
+					delta = tmpdelta;
+					n = testn;
+					m = testm;
+					p = testp;
+				}
+			}
+		}
+	}
+
+	pixpllc->m = m;
+	pixpllc->n = n;
+	pixpllc->p = p;
+	pixpllc->s = s;
+
+	return 0;
+}
+
+void mgag200_g200eh_pixpllc_atomic_update(struct drm_crtc *crtc,
+					  struct drm_atomic_state *old_state)
+{
+	struct drm_device *dev = crtc->dev;
+	struct mga_device *mdev = to_mga_device(dev);
+	struct drm_crtc_state *crtc_state = crtc->state;
+	struct mgag200_crtc_state *mgag200_crtc_state = to_mgag200_crtc_state(crtc_state);
+	struct mgag200_pll_values *pixpllc = &mgag200_crtc_state->pixpllc;
+	unsigned int pixpllcm, pixpllcn, pixpllcp, pixpllcs;
+	u8 xpixpllcm, xpixpllcn, xpixpllcp, tmp;
+	int i, j, tmpcount, vcount;
+	bool pll_locked = false;
+
+	pixpllcm = pixpllc->m - 1;
+	pixpllcn = pixpllc->n - 1;
+	pixpllcp = pixpllc->p - 1;
+	pixpllcs = pixpllc->s;
+
+	xpixpllcm = ((pixpllcn & BIT(8)) >> 1) | pixpllcm;
+	xpixpllcn = pixpllcn;
+	xpixpllcp = (pixpllcs << 3) | pixpllcp;
+
+	WREG_MISC_MASKED(MGAREG_MISC_CLKSEL_MGA, MGAREG_MISC_CLKSEL_MASK);
+
+	for (i = 0; i <= 32 && pll_locked == false; i++) {
+		WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
+		tmp = RREG8(DAC_DATA);
+		tmp |= MGA1064_PIX_CLK_CTL_CLK_DIS;
+		WREG8(DAC_DATA, tmp);
+
+		tmp = RREG8(MGAREG_MEM_MISC_READ);
+		tmp |= 0x3 << 2;
+		WREG8(MGAREG_MEM_MISC_WRITE, tmp);
+
+		WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
+		tmp = RREG8(DAC_DATA);
+		tmp |= MGA1064_PIX_CLK_CTL_CLK_POW_DOWN;
+		WREG8(DAC_DATA, tmp);
+
+		udelay(500);
+
+		WREG_DAC(MGA1064_EH_PIX_PLLC_M, xpixpllcm);
+		WREG_DAC(MGA1064_EH_PIX_PLLC_N, xpixpllcn);
+		WREG_DAC(MGA1064_EH_PIX_PLLC_P, xpixpllcp);
+
+		udelay(500);
+
+		WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
+		tmp = RREG8(DAC_DATA);
+		tmp &= ~MGA1064_PIX_CLK_CTL_SEL_MSK;
+		tmp |= MGA1064_PIX_CLK_CTL_SEL_PLL;
+		WREG8(DAC_DATA, tmp);
+
+		WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
+		tmp = RREG8(DAC_DATA);
+		tmp &= ~MGA1064_PIX_CLK_CTL_CLK_DIS;
+		tmp &= ~MGA1064_PIX_CLK_CTL_CLK_POW_DOWN;
+		WREG8(DAC_DATA, tmp);
+
+		vcount = RREG8(MGAREG_VCOUNT);
+
+		for (j = 0; j < 30 && pll_locked == false; j++) {
+			tmpcount = RREG8(MGAREG_VCOUNT);
+			if (tmpcount < vcount)
+				vcount = 0;
+			if ((tmpcount - vcount) > 2)
+				pll_locked = true;
+			else
+				udelay(5);
+		}
+	}
+}
+
+/*
  * DRM device
  */
 
···
 	MGAG200_DEVICE_INFO_INIT(2048, 2048, 37500, false, 1, 0, false);
 
 static const struct mgag200_device_funcs mgag200_g200eh_device_funcs = {
+	.pixpllc_atomic_check = mgag200_g200eh_pixpllc_atomic_check,
+	.pixpllc_atomic_update = mgag200_g200eh_pixpllc_atomic_update,
 };
 
 struct mga_device *mgag200_g200eh_device_create(struct pci_dev *pdev, const struct drm_driver *drv,

drivers/gpu/drm/mgag200/mgag200_g200eh3.c

···
 
 #include <linux/pci.h>
 
+#include <drm/drm_atomic.h>
 #include <drm/drm_drv.h>
 
 #include "mgag200_drv.h"
+
+/*
+ * PIXPLLC
+ */
+
+static int mgag200_g200eh3_pixpllc_atomic_check(struct drm_crtc *crtc,
+						struct drm_atomic_state *new_state)
+{
+	static const unsigned int vcomax = 3000000;
+	static const unsigned int vcomin = 1500000;
+	static const unsigned int pllreffreq = 25000;
+
+	struct drm_crtc_state *new_crtc_state = drm_atomic_get_new_crtc_state(new_state, crtc);
+	struct mgag200_crtc_state *new_mgag200_crtc_state = to_mgag200_crtc_state(new_crtc_state);
+	long clock = new_crtc_state->mode.clock;
+	struct mgag200_pll_values *pixpllc = &new_mgag200_crtc_state->pixpllc;
+	unsigned int delta, tmpdelta;
+	unsigned int testp, testm, testn;
+	unsigned int p, m, n, s;
+	unsigned int computed;
+
+	m = n = p = s = 0;
+	delta = 0xffffffff;
+	testp = 0;
+
+	for (testm = 150; testm >= 6; testm--) {
+		if (clock * testm > vcomax)
+			continue;
+		if (clock * testm < vcomin)
+			continue;
+		for (testn = 120; testn >= 60; testn--) {
+			computed = (pllreffreq * testn) / testm;
+			if (computed > clock)
+				tmpdelta = computed - clock;
+			else
+				tmpdelta = clock - computed;
+			if (tmpdelta < delta) {
+				delta = tmpdelta;
+				n = testn + 1;
+				m = testm + 1;
+				p = testp + 1;
+			}
+			if (delta == 0)
+				break;
+		}
+		if (delta == 0)
+			break;
+	}
+
+	pixpllc->m = m;
+	pixpllc->n = n;
+	pixpllc->p = p;
+	pixpllc->s = s;
+
+	return 0;
+}
 
 /*
  * DRM device
···
 	MGAG200_DEVICE_INFO_INIT(2048, 2048, 0, false, 1, 0, false);
 
 static const struct mgag200_device_funcs mgag200_g200eh3_device_funcs = {
+	.pixpllc_atomic_check = mgag200_g200eh3_pixpllc_atomic_check,
+	.pixpllc_atomic_update = mgag200_g200eh_pixpllc_atomic_update, // same as G200EH
 };
 
 struct mga_device *mgag200_g200eh3_device_create(struct pci_dev *pdev,

drivers/gpu/drm/mgag200/mgag200_g200er.c

···
 // SPDX-License-Identifier: GPL-2.0-only
 
+#include <linux/delay.h>
 #include <linux/pci.h>
 
+#include <drm/drm_atomic.h>
 #include <drm/drm_drv.h>
 
 #include "mgag200_drv.h"
···
 }
 
 /*
+ * PIXPLLC
+ */
+
+static int mgag200_g200er_pixpllc_atomic_check(struct drm_crtc *crtc,
+					       struct drm_atomic_state *new_state)
+{
+	static const unsigned int vcomax = 1488000;
+	static const unsigned int vcomin = 1056000;
+	static const unsigned int pllreffreq = 48000;
+	static const unsigned int m_div_val[] = { 1, 2, 4, 8 };
+
+	struct drm_crtc_state *new_crtc_state = drm_atomic_get_new_crtc_state(new_state, crtc);
+	struct mgag200_crtc_state *new_mgag200_crtc_state = to_mgag200_crtc_state(new_crtc_state);
+	long clock = new_crtc_state->mode.clock;
+	struct mgag200_pll_values *pixpllc = &new_mgag200_crtc_state->pixpllc;
+	unsigned int delta, tmpdelta;
+	int testr, testn, testm, testo;
+	unsigned int p, m, n, s;
+	unsigned int computed, vco;
+
+	m = n = p = s = 0;
+	delta = 0xffffffff;
+
+	for (testr = 0; testr < 4; testr++) {
+		if (delta == 0)
+			break;
+		for (testn = 5; testn < 129; testn++) {
+			if (delta == 0)
+				break;
+			for (testm = 3; testm >= 0; testm--) {
+				if (delta == 0)
+					break;
+				for (testo = 5; testo < 33; testo++) {
+					vco = pllreffreq * (testn + 1) /
+						(testr + 1);
+					if (vco < vcomin)
+						continue;
+					if (vco > vcomax)
+						continue;
+					computed = vco / (m_div_val[testm] * (testo + 1));
+					if (computed > clock)
+						tmpdelta = computed - clock;
+					else
+						tmpdelta = clock - computed;
+					if (tmpdelta < delta) {
+						delta = tmpdelta;
+						m = (testm | (testo << 3)) + 1;
+						n = testn + 1;
+						p = testr + 1;
+						s = testr;
+					}
+				}
+			}
+		}
+	}
+
+	pixpllc->m = m;
+	pixpllc->n = n;
+	pixpllc->p = p;
+	pixpllc->s = s;
+
+	return 0;
+}
+
+static void mgag200_g200er_pixpllc_atomic_update(struct drm_crtc *crtc,
+						 struct drm_atomic_state *old_state)
+{
+	struct drm_device *dev = crtc->dev;
+	struct mga_device *mdev = to_mga_device(dev);
+	struct drm_crtc_state *crtc_state = crtc->state;
+	struct mgag200_crtc_state *mgag200_crtc_state = to_mgag200_crtc_state(crtc_state);
+	struct mgag200_pll_values *pixpllc = &mgag200_crtc_state->pixpllc;
+	unsigned int pixpllcm, pixpllcn, pixpllcp, pixpllcs;
+	u8 xpixpllcm, xpixpllcn, xpixpllcp, tmp;
+
+	pixpllcm = pixpllc->m - 1;
+	pixpllcn = pixpllc->n - 1;
+	pixpllcp = pixpllc->p - 1;
+	pixpllcs = pixpllc->s;
+
+	xpixpllcm = pixpllcm;
+	xpixpllcn = pixpllcn;
+	xpixpllcp = (pixpllcs << 3) | pixpllcp;
+
+	WREG_MISC_MASKED(MGAREG_MISC_CLKSEL_MGA, MGAREG_MISC_CLKSEL_MASK);
+
+	WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
+	tmp = RREG8(DAC_DATA);
+	tmp |= MGA1064_PIX_CLK_CTL_CLK_DIS;
+	WREG8(DAC_DATA, tmp);
+
+	WREG8(DAC_INDEX, MGA1064_REMHEADCTL);
+	tmp = RREG8(DAC_DATA);
+	tmp |= MGA1064_REMHEADCTL_CLKDIS;
+	WREG8(DAC_DATA, tmp);
+
+	tmp = RREG8(MGAREG_MEM_MISC_READ);
+	tmp |= (0x3<<2) | 0xc0;
+	WREG8(MGAREG_MEM_MISC_WRITE, tmp);
+
+	WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
+	tmp = RREG8(DAC_DATA);
+	tmp &= ~MGA1064_PIX_CLK_CTL_CLK_DIS;
+	tmp |= MGA1064_PIX_CLK_CTL_CLK_POW_DOWN;
+	WREG8(DAC_DATA, tmp);
+
+	udelay(500);
+
+	WREG_DAC(MGA1064_ER_PIX_PLLC_N, xpixpllcn);
+	WREG_DAC(MGA1064_ER_PIX_PLLC_M, xpixpllcm);
+	WREG_DAC(MGA1064_ER_PIX_PLLC_P, xpixpllcp);
+
+	udelay(50);
+}
+
+/*
  * DRM device
  */
 
···
 	MGAG200_DEVICE_INFO_INIT(2048, 2048, 55000, false, 1, 0, false);
 
 static const struct mgag200_device_funcs mgag200_g200er_device_funcs = {
+	.pixpllc_atomic_check = mgag200_g200er_pixpllc_atomic_check,
+	.pixpllc_atomic_update = mgag200_g200er_pixpllc_atomic_update,
 };
 
 struct mga_device *mgag200_g200er_device_create(struct pci_dev *pdev, const struct drm_driver *drv,

drivers/gpu/drm/mgag200/mgag200_g200ev.c

···
 // SPDX-License-Identifier: GPL-2.0-only
 
+#include <linux/delay.h>
 #include <linux/pci.h>
 
+#include <drm/drm_atomic.h>
 #include <drm/drm_drv.h>
 
 #include "mgag200_drv.h"
···
 }
 
 /*
+ * PIXPLLC
+ */
+
+static int mgag200_g200ev_pixpllc_atomic_check(struct drm_crtc *crtc,
+					       struct drm_atomic_state *new_state)
+{
+	static const unsigned int vcomax = 550000;
+	static const unsigned int vcomin = 150000;
+	static const unsigned int pllreffreq = 50000;
+
+	struct drm_crtc_state *new_crtc_state = drm_atomic_get_new_crtc_state(new_state, crtc);
+	struct mgag200_crtc_state *new_mgag200_crtc_state = to_mgag200_crtc_state(new_crtc_state);
+	long clock = new_crtc_state->mode.clock;
+	struct mgag200_pll_values *pixpllc = &new_mgag200_crtc_state->pixpllc;
+	unsigned int delta, tmpdelta;
+	unsigned int testp, testm, testn;
+	unsigned int p, m, n, s;
+	unsigned int computed;
+
+	m = n = p = s = 0;
+	delta = 0xffffffff;
+
+	for (testp = 16; testp > 0; testp--) {
+		if (clock * testp > vcomax)
+			continue;
+		if (clock * testp < vcomin)
+			continue;
+
+		for (testn = 1; testn < 257; testn++) {
+			for (testm = 1; testm < 17; testm++) {
+				computed = (pllreffreq * testn) /
+					(testm * testp);
+				if (computed > clock)
+					tmpdelta = computed - clock;
+				else
+					tmpdelta = clock - computed;
+				if (tmpdelta < delta) {
+					delta = tmpdelta;
+					n = testn;
+					m = testm;
+					p = testp;
+				}
+			}
+		}
+	}
+
+	pixpllc->m = m;
+	pixpllc->n = n;
+	pixpllc->p = p;
+	pixpllc->s = s;
+
+	return 0;
+}
+
+static void mgag200_g200ev_pixpllc_atomic_update(struct drm_crtc *crtc,
+						 struct drm_atomic_state *old_state)
+{
+	struct drm_device *dev = crtc->dev;
+	struct mga_device *mdev = to_mga_device(dev);
+	struct drm_crtc_state *crtc_state = crtc->state;
+	struct mgag200_crtc_state *mgag200_crtc_state = to_mgag200_crtc_state(crtc_state);
+	struct mgag200_pll_values *pixpllc = &mgag200_crtc_state->pixpllc;
+	unsigned int pixpllcm, pixpllcn, pixpllcp, pixpllcs;
+	u8 xpixpllcm, xpixpllcn, xpixpllcp, tmp;
+
+	pixpllcm = pixpllc->m - 1;
+	pixpllcn = pixpllc->n - 1;
+	pixpllcp = pixpllc->p - 1;
+	pixpllcs = pixpllc->s;
+
+	xpixpllcm = pixpllcm;
+	xpixpllcn = pixpllcn;
+	xpixpllcp = (pixpllcs << 3) | pixpllcp;
+
+	WREG_MISC_MASKED(MGAREG_MISC_CLKSEL_MGA, MGAREG_MISC_CLKSEL_MASK);
+
+	WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
+	tmp = RREG8(DAC_DATA);
+	tmp |= MGA1064_PIX_CLK_CTL_CLK_DIS;
+	WREG8(DAC_DATA, tmp);
+
+	tmp = RREG8(MGAREG_MEM_MISC_READ);
+	tmp |= 0x3 << 2;
+	WREG8(MGAREG_MEM_MISC_WRITE, tmp);
+
+	WREG8(DAC_INDEX, MGA1064_PIX_PLL_STAT);
+	tmp = RREG8(DAC_DATA);
+	WREG8(DAC_DATA, tmp & ~0x40);
+
+	WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
+	tmp = RREG8(DAC_DATA);
+	tmp |= MGA1064_PIX_CLK_CTL_CLK_POW_DOWN;
+	WREG8(DAC_DATA, tmp);
+
+	WREG_DAC(MGA1064_EV_PIX_PLLC_M, xpixpllcm);
+	WREG_DAC(MGA1064_EV_PIX_PLLC_N, xpixpllcn);
+	WREG_DAC(MGA1064_EV_PIX_PLLC_P, xpixpllcp);
+
+	udelay(50);
+
+	WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
+	tmp = RREG8(DAC_DATA);
+	tmp &= ~MGA1064_PIX_CLK_CTL_CLK_POW_DOWN;
+	WREG8(DAC_DATA, tmp);
+
+	udelay(500);
+
+	WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
+	tmp = RREG8(DAC_DATA);
+	tmp &= ~MGA1064_PIX_CLK_CTL_SEL_MSK;
+	tmp |= MGA1064_PIX_CLK_CTL_SEL_PLL;
+	WREG8(DAC_DATA, tmp);
+
+	WREG8(DAC_INDEX, MGA1064_PIX_PLL_STAT);
+	tmp = RREG8(DAC_DATA);
+	WREG8(DAC_DATA, tmp | 0x40);
+
+	tmp = RREG8(MGAREG_MEM_MISC_READ);
+	tmp |= (0x3 << 2);
+	WREG8(MGAREG_MEM_MISC_WRITE, tmp);
+
+	WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
+	tmp = RREG8(DAC_DATA);
+	tmp &= ~MGA1064_PIX_CLK_CTL_CLK_DIS;
+	WREG8(DAC_DATA, tmp);
+}
+
+/*
  * DRM device
  */
 
···
 	MGAG200_DEVICE_INFO_INIT(2048, 2048, 32700, false, 0, 1, false);
 
 static const struct mgag200_device_funcs mgag200_g200ev_device_funcs = {
+	.pixpllc_atomic_check = mgag200_g200ev_pixpllc_atomic_check,
+	.pixpllc_atomic_update = mgag200_g200ev_pixpllc_atomic_update,
 };
 
 struct mga_device *mgag200_g200ev_device_create(struct pci_dev *pdev, const struct drm_driver *drv,

drivers/gpu/drm/mgag200/mgag200_g200ew3.c

···
 
 #include <linux/pci.h>
 
+#include <drm/drm_atomic.h>
 #include <drm/drm_drv.h>
 
 #include "mgag200_drv.h"
···
 }
 
 /*
+ * PIXPLLC
+ */
+
+static int mgag200_g200ew3_pixpllc_atomic_check(struct drm_crtc *crtc,
+						struct drm_atomic_state *new_state)
+{
+	static const unsigned int vcomax = 800000;
+	static const unsigned int vcomin = 400000;
+	static const unsigned int pllreffreq = 25000;
+
+	struct drm_crtc_state *new_crtc_state = drm_atomic_get_new_crtc_state(new_state, crtc);
+	struct mgag200_crtc_state *new_mgag200_crtc_state = to_mgag200_crtc_state(new_crtc_state);
+	long clock = new_crtc_state->mode.clock;
+	struct mgag200_pll_values *pixpllc = &new_mgag200_crtc_state->pixpllc;
+	unsigned int delta, tmpdelta;
+	unsigned int testp, testm, testn, testp2;
+	unsigned int p, m, n, s;
+	unsigned int computed;
+
+	m = n = p = s = 0;
+	delta = 0xffffffff;
+
+	for (testp = 1; testp < 8; testp++) {
+		for (testp2 = 1; testp2 < 8; testp2++) {
+			if (testp < testp2)
+				continue;
+			if ((clock * testp * testp2) > vcomax)
+				continue;
+			if ((clock * testp * testp2) < vcomin)
+				continue;
+			for (testm = 1; testm < 26; testm++) {
+				for (testn = 32; testn < 2048 ; testn++) {
+					computed = (pllreffreq * testn) / (testm * testp * testp2);
+					if (computed > clock)
+						tmpdelta = computed - clock;
+					else
+						tmpdelta = clock - computed;
+					if (tmpdelta < delta) {
+						delta = tmpdelta;
+						m = testm + 1;
+						n = testn + 1;
+						p = testp + 1;
+						s = testp2;
+					}
+				}
+			}
+		}
+	}
+
+	pixpllc->m = m;
+	pixpllc->n = n;
+	pixpllc->p = p;
+	pixpllc->s = s;
+
+	return 0;
+}
+
+/*
  * DRM device
  */
 
···
 static const struct mgag200_device_funcs mgag200_g200ew3_device_funcs = {
 	.disable_vidrst = mgag200_bmc_disable_vidrst,
 	.enable_vidrst = mgag200_bmc_enable_vidrst,
+	.pixpllc_atomic_check = mgag200_g200ew3_pixpllc_atomic_check,
+	.pixpllc_atomic_update = mgag200_g200wb_pixpllc_atomic_update, // same as G200WB
 };
 
 static resource_size_t mgag200_g200ew3_device_probe_vram(struct mga_device *mdev)

drivers/gpu/drm/mgag200/mgag200_g200se.c

···
 // SPDX-License-Identifier: GPL-2.0-only
 
+#include <linux/delay.h>
 #include <linux/pci.h>
 
+#include <drm/drm_atomic.h>
 #include <drm/drm_drv.h>
 
 #include "mgag200_drv.h"
···
 }
 
 /*
+ * PIXPLLC
+ */
+
+static int mgag200_g200se_00_pixpllc_atomic_check(struct drm_crtc *crtc,
+						  struct drm_atomic_state *new_state)
+{
+	static const unsigned int vcomax = 320000;
+	static const unsigned int vcomin = 160000;
+	static const unsigned int pllreffreq = 25000;
+
+	struct drm_crtc_state *new_crtc_state = drm_atomic_get_new_crtc_state(new_state, crtc);
+	struct mgag200_crtc_state *new_mgag200_crtc_state = to_mgag200_crtc_state(new_crtc_state);
+	long clock = new_crtc_state->mode.clock;
+	struct mgag200_pll_values *pixpllc = &new_mgag200_crtc_state->pixpllc;
+	unsigned int delta, tmpdelta, permitteddelta;
+	unsigned int testp, testm, testn;
+	unsigned int p, m, n, s;
+	unsigned int computed;
+
+	m = n = p = s = 0;
+	delta = 0xffffffff;
+	permitteddelta = clock * 5 / 1000;
+
+	for (testp = 8; testp > 0; testp /= 2) {
+		if (clock * testp > vcomax)
+			continue;
+		if (clock * testp < vcomin)
+			continue;
+
+		for (testn = 17; testn < 256; testn++) {
+			for (testm = 1; testm < 32; testm++) {
+				computed = (pllreffreq * testn) / (testm * testp);
+				if (computed > clock)
+					tmpdelta = computed - clock;
+				else
+					tmpdelta = clock - computed;
+				if (tmpdelta < delta) {
+					delta = tmpdelta;
+					m = testm;
+					n = testn;
+					p = testp;
+				}
+			}
+		}
+	}
+
+	if (delta > permitteddelta) {
+		pr_warn("PLL delta too large\n");
+		return -EINVAL;
+	}
+
+	pixpllc->m = m;
+	pixpllc->n = n;
+	pixpllc->p = p;
+	pixpllc->s = s;
+
+	return 0;
+}
+
+static void mgag200_g200se_00_pixpllc_atomic_update(struct drm_crtc *crtc,
+						    struct drm_atomic_state *old_state)
+{
+	struct drm_device *dev = crtc->dev;
+	struct mga_device *mdev = to_mga_device(dev);
+	struct drm_crtc_state *crtc_state = crtc->state;
+	struct mgag200_crtc_state *mgag200_crtc_state = to_mgag200_crtc_state(crtc_state);
+	struct mgag200_pll_values *pixpllc = &mgag200_crtc_state->pixpllc;
+	unsigned int pixpllcm, pixpllcn, pixpllcp, pixpllcs;
+	u8 xpixpllcm, xpixpllcn, xpixpllcp;
+
+	pixpllcm = pixpllc->m - 1;
+	pixpllcn = pixpllc->n - 1;
+	pixpllcp = pixpllc->p - 1;
+	pixpllcs = pixpllc->s;
+
+	xpixpllcm = pixpllcm | ((pixpllcn & BIT(8)) >> 1);
+	xpixpllcn = pixpllcn;
+	xpixpllcp = (pixpllcs << 3) | pixpllcp;
+
+	WREG_MISC_MASKED(MGAREG_MISC_CLKSEL_MGA, MGAREG_MISC_CLKSEL_MASK);
+
+	WREG_DAC(MGA1064_PIX_PLLC_M, xpixpllcm);
+	WREG_DAC(MGA1064_PIX_PLLC_N, xpixpllcn);
+	WREG_DAC(MGA1064_PIX_PLLC_P, xpixpllcp);
+}
+
+static int mgag200_g200se_04_pixpllc_atomic_check(struct drm_crtc *crtc,
+						  struct drm_atomic_state *new_state)
+{
+	static const unsigned int vcomax = 1600000;
+	static const unsigned int vcomin = 800000;
+	static const unsigned int pllreffreq = 25000;
+	static const unsigned int pvalues_e4[] = {16, 14, 12, 10, 8, 6, 4, 2, 1};
+
+	struct drm_crtc_state *new_crtc_state = drm_atomic_get_new_crtc_state(new_state, crtc);
+	struct mgag200_crtc_state *new_mgag200_crtc_state = to_mgag200_crtc_state(new_crtc_state);
+	long clock = new_crtc_state->mode.clock;
+	struct mgag200_pll_values *pixpllc = &new_mgag200_crtc_state->pixpllc;
+	unsigned int delta, tmpdelta, permitteddelta;
+	unsigned int testp, testm, testn;
+	unsigned int p, m, n, s;
+	unsigned int computed;
+	unsigned int fvv;
+	unsigned int i;
+
+	m = n = p = s = 0;
+	delta = 0xffffffff;
+
+	if (clock < 25000)
+		clock = 25000;
+	clock = clock * 2;
+
+	/* Permited delta is 0.5% as VESA Specification */
+	permitteddelta = clock * 5 / 1000;
+
+	for (i = 0 ; i < ARRAY_SIZE(pvalues_e4); i++) {
+		testp = pvalues_e4[i];
+
+		if ((clock * testp) > vcomax)
+			continue;
+		if ((clock * testp) < vcomin)
+			continue;
+
+		for (testn = 50; testn <= 256; testn++) {
+			for (testm = 1; testm <= 32; testm++) {
+				computed = (pllreffreq * testn) / (testm * testp);
+				if (computed > clock)
+					tmpdelta = computed - clock;
+				else
+					tmpdelta = clock - computed;
+
+				if (tmpdelta < delta) {
+					delta = tmpdelta;
+					m = testm;
+					n = testn;
+					p = testp;
+				}
+			}
+		}
+	}
+
+	fvv = pllreffreq * n / m;
+	fvv = (fvv - 800000) / 50000;
+	if (fvv > 15)
+		fvv = 15;
+	s = fvv << 1;
+
+	if (delta > permitteddelta) {
+		pr_warn("PLL delta too large\n");
+		return -EINVAL;
+	}
+
+	pixpllc->m = m;
+	pixpllc->n = n;
+	pixpllc->p = p;
+	pixpllc->s = s;
+
+	return 0;
+}
+
+static void mgag200_g200se_04_pixpllc_atomic_update(struct drm_crtc *crtc,
+						    struct drm_atomic_state *old_state)
+{
+	struct drm_device *dev = crtc->dev;
+	struct mga_device *mdev = to_mga_device(dev);
+	struct drm_crtc_state *crtc_state = crtc->state;
+	struct mgag200_crtc_state *mgag200_crtc_state = to_mgag200_crtc_state(crtc_state);
+	struct mgag200_pll_values *pixpllc = &mgag200_crtc_state->pixpllc;
+	unsigned int pixpllcm, pixpllcn, pixpllcp, pixpllcs;
+	u8 xpixpllcm, xpixpllcn, xpixpllcp;
+
+	pixpllcm = pixpllc->m - 1;
+	pixpllcn = pixpllc->n - 1;
+	pixpllcp = pixpllc->p - 1;
+	pixpllcs = pixpllc->s;
+
+	xpixpllcm = pixpllcm | ((pixpllcn & BIT(8)) >> 1);
+	xpixpllcn = pixpllcn;
+	xpixpllcp = (pixpllcs << 3) | pixpllcp;
+
+	WREG_MISC_MASKED(MGAREG_MISC_CLKSEL_MGA, MGAREG_MISC_CLKSEL_MASK);
+
+	WREG_DAC(MGA1064_PIX_PLLC_M, xpixpllcm);
+	WREG_DAC(MGA1064_PIX_PLLC_N, xpixpllcn);
+	WREG_DAC(MGA1064_PIX_PLLC_P, xpixpllcp);
+
+	WREG_DAC(0x1a, 0x09);
+	msleep(20);
+	WREG_DAC(0x1a, 0x01);
+}
+
+/*
  * DRM device
  */
 
···
 	return 0;
 }
 
-static const struct mgag200_device_funcs mgag200_g200se_device_funcs = {
+static const struct mgag200_device_funcs mgag200_g200se_00_device_funcs = {
+	.pixpllc_atomic_check = mgag200_g200se_00_pixpllc_atomic_check,
+	.pixpllc_atomic_update = mgag200_g200se_00_pixpllc_atomic_update,
+};
+
+static const struct mgag200_device_funcs mgag200_g200se_04_device_funcs = {
+	.pixpllc_atomic_check = mgag200_g200se_04_pixpllc_atomic_check,
+	.pixpllc_atomic_update = mgag200_g200se_04_pixpllc_atomic_update,
 };
 
 struct mga_device *mgag200_g200se_device_create(struct pci_dev *pdev, const struct drm_driver *drv,
···
 {
 	struct mgag200_g200se_device *g200se;
 	const struct mgag200_device_info *info;
+	const struct mgag200_device_funcs *funcs;
 	struct mga_device *mdev;
 	struct drm_device *dev;
 	resource_size_t vram_available;
···
 		return ERR_PTR(-EINVAL);
 	}
 
-	ret = mgag200_device_init(mdev, type, info, &mgag200_g200se_device_funcs);
+	if (g200se->unique_rev_id >= 0x04)
+		funcs = &mgag200_g200se_04_device_funcs;
+	else
+		funcs = &mgag200_g200se_00_device_funcs;
+
+	ret = mgag200_device_init(mdev, type, info, funcs);
 	if (ret)
 		return ERR_PTR(ret);
 

drivers/gpu/drm/mgag200/mgag200_g200wb.c

···
 // SPDX-License-Identifier: GPL-2.0-only
 
+#include <linux/delay.h>
 #include <linux/pci.h>
 
+#include <drm/drm_atomic.h>
 #include <drm/drm_drv.h>
 
 #include "mgag200_drv.h"
···
 }
 
 /*
+ * PIXPLLC
+ */
+
+static int mgag200_g200wb_pixpllc_atomic_check(struct drm_crtc *crtc,
+					       struct drm_atomic_state *new_state)
+{
+	static const unsigned int vcomax = 550000;
+	static const unsigned int vcomin = 150000;
+	static const unsigned int pllreffreq = 48000;
+
+	struct drm_crtc_state *new_crtc_state = drm_atomic_get_new_crtc_state(new_state, crtc);
+	struct mgag200_crtc_state *new_mgag200_crtc_state = to_mgag200_crtc_state(new_crtc_state);
+	long clock = new_crtc_state->mode.clock;
+	struct mgag200_pll_values *pixpllc = &new_mgag200_crtc_state->pixpllc;
+	unsigned int delta, tmpdelta;
+	unsigned int testp, testm, testn;
+	unsigned int p, m, n, s;
+	unsigned int computed;
+
+	m = n = p = s = 0;
+	delta = 0xffffffff;
+
+	for (testp = 1; testp < 9; testp++) {
+		if (clock * testp > vcomax)
+			continue;
+		if (clock * testp < vcomin)
+			continue;
+
+		for (testm = 1; testm < 17; testm++) {
+			for (testn = 1; testn < 151; testn++) {
+				computed = (pllreffreq * testn) / (testm * testp);
+				if (computed > clock)
+					tmpdelta = computed - clock;
+				else
+					tmpdelta = clock - computed;
+				if (tmpdelta < delta) {
+					delta = tmpdelta;
+					n = testn;
+					m = testm;
+					p = testp;
+					s = 0;
+				}
+			}
+		}
+	}
+
+	pixpllc->m = m;
+	pixpllc->n = n;
+	pixpllc->p = p;
+	pixpllc->s = s;
+
+	return 0;
+}
+
+void mgag200_g200wb_pixpllc_atomic_update(struct drm_crtc *crtc,
+					  struct drm_atomic_state *old_state)
+{
+	struct drm_device *dev = crtc->dev;
+	struct mga_device *mdev = to_mga_device(dev);
+	struct drm_crtc_state *crtc_state = crtc->state;
+	struct mgag200_crtc_state *mgag200_crtc_state = to_mgag200_crtc_state(crtc_state);
+	struct mgag200_pll_values *pixpllc = &mgag200_crtc_state->pixpllc;
+	bool pll_locked = false;
+	unsigned int pixpllcm, pixpllcn, pixpllcp, pixpllcs;
+	u8 xpixpllcm, xpixpllcn, xpixpllcp, tmp;
+	int i, j, tmpcount, vcount;
+
+	pixpllcm = pixpllc->m - 1;
+	pixpllcn = pixpllc->n - 1;
+	pixpllcp = pixpllc->p - 1;
+	pixpllcs = pixpllc->s;
+
+	xpixpllcm = ((pixpllcn & BIT(8)) >> 1) | pixpllcm;
+	xpixpllcn = pixpllcn;
+	xpixpllcp = ((pixpllcn & GENMASK(10, 9)) >> 3) | (pixpllcs << 3) | pixpllcp;
+
+	WREG_MISC_MASKED(MGAREG_MISC_CLKSEL_MGA, MGAREG_MISC_CLKSEL_MASK);
+
+	for (i = 0; i <= 32 && pll_locked == false; i++) {
+		if (i > 0) {
+			WREG8(MGAREG_CRTC_INDEX, 0x1e);
+			tmp = RREG8(MGAREG_CRTC_DATA);
+			if (tmp < 0xff)
+				WREG8(MGAREG_CRTC_DATA, tmp+1);
+		}
+
+		/* set pixclkdis to 1 */
+		WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
+		tmp = RREG8(DAC_DATA);
+		tmp |= MGA1064_PIX_CLK_CTL_CLK_DIS;
+		WREG8(DAC_DATA, tmp);
+
+		WREG8(DAC_INDEX, MGA1064_REMHEADCTL);
+		tmp = RREG8(DAC_DATA);
+		tmp |= MGA1064_REMHEADCTL_CLKDIS;
+		WREG8(DAC_DATA, tmp);
+
+		/* select PLL Set C */
+		tmp = RREG8(MGAREG_MEM_MISC_READ);
+		tmp |= 0x3 << 2;
+		WREG8(MGAREG_MEM_MISC_WRITE, tmp);
+
+		WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
+		tmp = RREG8(DAC_DATA);
+		tmp |= MGA1064_PIX_CLK_CTL_CLK_POW_DOWN | 0x80;
+		WREG8(DAC_DATA, tmp);
+
+		udelay(500);
+
+		/* reset the PLL */
+		WREG8(DAC_INDEX, MGA1064_VREF_CTL);
+		tmp = RREG8(DAC_DATA);
+		tmp &= ~0x04;
+		WREG8(DAC_DATA, tmp);
+
+		udelay(50);
+
+		/* program pixel pll register */
+		WREG_DAC(MGA1064_WB_PIX_PLLC_N, xpixpllcn);
+		WREG_DAC(MGA1064_WB_PIX_PLLC_M, xpixpllcm);
+		WREG_DAC(MGA1064_WB_PIX_PLLC_P, xpixpllcp);
+
+		udelay(50);
+
+		/* turn pll on */
+		WREG8(DAC_INDEX, MGA1064_VREF_CTL);
+		tmp = RREG8(DAC_DATA);
+		tmp |= 0x04;
+		WREG_DAC(MGA1064_VREF_CTL, tmp);
+
+		udelay(500);
+
+		/* select the pixel pll */
+		WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
+		tmp = RREG8(DAC_DATA);
+		tmp &= ~MGA1064_PIX_CLK_CTL_SEL_MSK;
+		tmp |= MGA1064_PIX_CLK_CTL_SEL_PLL;
+		WREG8(DAC_DATA, tmp);
+
+		WREG8(DAC_INDEX, MGA1064_REMHEADCTL);
+		tmp = RREG8(DAC_DATA);
+		tmp &= ~MGA1064_REMHEADCTL_CLKSL_MSK;
+		tmp |= MGA1064_REMHEADCTL_CLKSL_PLL;
+		WREG8(DAC_DATA, tmp);
+
+		/* reset dotclock rate bit */
+		WREG8(MGAREG_SEQ_INDEX, 1);
+		tmp = RREG8(MGAREG_SEQ_DATA);
+		tmp &= ~0x8;
+		WREG8(MGAREG_SEQ_DATA, tmp);
+
+		WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
+		tmp = RREG8(DAC_DATA);
+		tmp &= ~MGA1064_PIX_CLK_CTL_CLK_DIS;
+		WREG8(DAC_DATA, tmp);
+
+		vcount = RREG8(MGAREG_VCOUNT);
+
+		for (j = 0; j < 30 && pll_locked == false; j++) {
+			tmpcount = RREG8(MGAREG_VCOUNT);
+			if (tmpcount < vcount)
+				vcount = 0;
+			if ((tmpcount - vcount) > 2)
+				pll_locked = true;
+			else
+				udelay(5);
+		}
+	}
+
+	WREG8(DAC_INDEX, MGA1064_REMHEADCTL);
+	tmp = RREG8(DAC_DATA);
+	tmp &= ~MGA1064_REMHEADCTL_CLKDIS;
+	WREG_DAC(MGA1064_REMHEADCTL, tmp);
+}
+
+/*
  * DRM device
  */
 
···
 static const struct mgag200_device_funcs mgag200_g200wb_device_funcs = {
 	.disable_vidrst = mgag200_bmc_disable_vidrst,
 	.enable_vidrst = mgag200_bmc_enable_vidrst,
+	.pixpllc_atomic_check = mgag200_g200wb_pixpllc_atomic_check,
+	.pixpllc_atomic_update = mgag200_g200wb_pixpllc_atomic_update,
 };
 
 struct mga_device *mgag200_g200wb_device_create(struct pci_dev *pdev, const struct drm_driver *drv,

drivers/gpu/drm/mgag200/mgag200_mode.c

···
 {
 	struct drm_device *dev = crtc->dev;
 	struct mga_device *mdev = to_mga_device(dev);
+	const struct mgag200_device_funcs *funcs = mdev->funcs;
 	struct drm_crtc_state *new_crtc_state = drm_atomic_get_new_crtc_state(new_state, crtc);
-	struct mgag200_pll *pixpll = &mdev->pixpll;
-	struct mgag200_crtc_state *mgag200_crtc_state = to_mgag200_crtc_state(new_crtc_state);
 	struct drm_property_blob *new_gamma_lut = new_crtc_state->gamma_lut;
 	int ret;
 
···
 		return 0;
 
 	if (new_crtc_state->mode_changed) {
-		ret = pixpll->funcs->compute(pixpll, new_crtc_state->mode.clock,
-					     &mgag200_crtc_state->pixpllc);
-		if (ret)
-			return ret;
+		if (funcs->pixpllc_atomic_check) {
+			ret = funcs->pixpllc_atomic_check(crtc, new_state);
+			if (ret)
+				return ret;
+		}
 	}
 
 	if (new_crtc_state->color_mgmt_changed && new_gamma_lut) {
···
 	struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode;
 	struct mgag200_crtc_state *mgag200_crtc_state = to_mgag200_crtc_state(crtc_state);
 	const struct drm_format_info *format = mgag200_crtc_state->format;
-	struct mgag200_pll *pixpll = &mdev->pixpll;
 
 	if (funcs->disable_vidrst)
 		funcs->disable_vidrst(mdev);
···
 	mgag200_set_format_regs(mdev, format);
 	mgag200_set_mode_regs(mdev, adjusted_mode);
 
-	pixpll->funcs->update(pixpll, &mgag200_crtc_state->pixpllc);
+	if (funcs->pixpllc_atomic_update)
+		funcs->pixpllc_atomic_update(crtc, old_state);
 
 	if (mdev->type == G200_ER)
 		mgag200_g200er_reset_tagfifo(mdev);
···
 	struct mga_i2c_chan *i2c = &mdev->i2c;
 	struct drm_connector *connector = &mdev->connector;
 	int ret;
-
-	ret = mgag200_pixpll_init(&mdev->pixpll, mdev);
-	if (ret)
-		return ret;
 
 	ret = drm_universal_plane_init(dev, primary_plane, 0,
 				       &mgag200_primary_plane_funcs,

drivers/gpu/drm/mgag200/mgag200_pll.c

···
-// SPDX-License-Identifier: GPL-2.0-only
-
-#include <linux/delay.h>
-
-#include "mgag200_drv.h"
-
-/*
- * G200
- */
-
-static int mgag200_pixpll_compute_g200(struct mgag200_pll *pixpll, long clock,
-				       struct mgag200_pll_values *pixpllc)
-{
-	struct mga_device *mdev = pixpll->mdev;
-	struct drm_device *dev = &mdev->base;
-	struct mgag200_g200_device *g200 = to_mgag200_g200_device(dev);
-	const int post_div_max = 7;
-	const int in_div_min = 1;
-	const int in_div_max = 6;
-	const int feed_div_min = 7;
-	const int feed_div_max = 127;
-	u8 testp, testm, testn;
-	u8 n = 0, m = 0, p, s;
-	long f_vco;
-	long computed;
-	long delta, tmp_delta;
-	long ref_clk = g200->ref_clk;
-	long p_clk_min = g200->pclk_min;
-	long p_clk_max = g200->pclk_max;
-
-	if (clock > p_clk_max) {
-		drm_err(dev, "Pixel Clock %ld too high\n", clock);
-		return -EINVAL;
-	}
-
-	if (clock < p_clk_min >> 3)
-		clock = p_clk_min >> 3;
-
-	f_vco = clock;
-	for (testp = 0;
-	     testp <= post_div_max && f_vco < p_clk_min;
-	     testp = (testp << 1) + 1, f_vco <<= 1)
-		;
-	p = testp + 1;
-
-	delta = clock;
-
-	for (testm = in_div_min; testm <= in_div_max; testm++) {
-		for (testn = feed_div_min; testn <= feed_div_max; testn++) {
-			computed = ref_clk * (testn + 1) / (testm + 1);
-			if (computed < f_vco)
-				tmp_delta = f_vco - computed;
-			else
-				tmp_delta = computed - f_vco;
-			if (tmp_delta < delta) {
-				delta = tmp_delta;
-				m = testm + 1;
-				n = testn + 1;
-			}
-		}
-	}
-	f_vco = ref_clk * n / m;
-	if (f_vco < 100000)
-		s = 0;
-	else if (f_vco < 140000)
-		s = 1;
-	else if (f_vco < 180000)
-		s = 2;
-	else
-		s = 3;
-
-	drm_dbg_kms(dev, "clock: %ld vco: %ld m: %d n: %d p: %d s: %d\n",
-		    clock, f_vco, m, n, p, s);
-
-	pixpllc->m = m;
-	pixpllc->n = n;
-	pixpllc->p = p;
-	pixpllc->s = s;
-
-	return 0;
-}
-
-static void
-mgag200_pixpll_update_g200(struct mgag200_pll *pixpll, const struct mgag200_pll_values *pixpllc)
-{
-	struct mga_device *mdev = pixpll->mdev;
-	unsigned int pixpllcm, pixpllcn, pixpllcp, pixpllcs;
-	u8 xpixpllcm, xpixpllcn, xpixpllcp;
-
-	pixpllcm = pixpllc->m - 1;
-	pixpllcn = pixpllc->n - 1;
-	pixpllcp = pixpllc->p - 1;
-	pixpllcs = pixpllc->s;
-
-	xpixpllcm = pixpllcm;
-	xpixpllcn = pixpllcn;
-	xpixpllcp = (pixpllcs << 3) | pixpllcp;
-
-	WREG_MISC_MASKED(MGAREG_MISC_CLKSEL_MGA, MGAREG_MISC_CLKSEL_MASK);
-
-	WREG_DAC(MGA1064_PIX_PLLC_M, xpixpllcm);
-	WREG_DAC(MGA1064_PIX_PLLC_N, xpixpllcn);
-	WREG_DAC(MGA1064_PIX_PLLC_P, xpixpllcp);
-}
-
-static const struct mgag200_pll_funcs mgag200_pixpll_funcs_g200 = {
-	.compute = mgag200_pixpll_compute_g200,
-	.update = mgag200_pixpll_update_g200,
-};
-
-/*
- * G200SE
- */
-
-static int mgag200_pixpll_compute_g200se_00(struct mgag200_pll *pixpll, long clock,
-					    struct mgag200_pll_values *pixpllc)
-{
-	static const unsigned int vcomax = 320000;
-	static const unsigned int vcomin = 160000;
-	static const unsigned int pllreffreq = 25000;
-
-	unsigned int delta, tmpdelta, permitteddelta;
-	unsigned int testp, testm, testn;
-	unsigned int p, m, n, s;
-	unsigned int computed;
-
-	m = n = p = s = 0;
-	delta = 0xffffffff;
-	permitteddelta = clock * 5 / 1000;
-
-	for (testp = 8; testp > 0; testp /= 2) {
-		if (clock * testp > vcomax)
-			continue;
-		if (clock * testp < vcomin)
-			continue;
-
-		for (testn = 17; testn < 256; testn++) {
-			for (testm = 1; testm < 32; testm++) {
-				computed = (pllreffreq * testn) / (testm * testp);
-				if (computed > clock)
-					tmpdelta = computed - clock;
-				else
-					tmpdelta = clock - computed;
-				if (tmpdelta < delta) {
-					delta = tmpdelta;
-					m = testm;
-					n = testn;
-					p = testp;
-				}
-			}
-		}
-	}
-
-	if (delta > permitteddelta) {
-		pr_warn("PLL delta too large\n");
-		return -EINVAL;
-	}
-
-	pixpllc->m = m;
-	pixpllc->n = n;
-	pixpllc->p = p;
-	pixpllc->s = s;
-
-	return 0;
-}
-
-static void mgag200_pixpll_update_g200se_00(struct mgag200_pll *pixpll,
-					    const struct mgag200_pll_values *pixpllc)
-{
-	unsigned int pixpllcm, pixpllcn, pixpllcp, pixpllcs;
-	u8 xpixpllcm, xpixpllcn, xpixpllcp;
-	struct mga_device *mdev = pixpll->mdev;
-
-	pixpllcm = pixpllc->m - 1;
-	pixpllcn = pixpllc->n - 1;
-	pixpllcp = pixpllc->p - 1;
-	pixpllcs = pixpllc->s;
-
-	xpixpllcm = pixpllcm | ((pixpllcn & BIT(8)) >> 1);
-	xpixpllcn = pixpllcn;
-	xpixpllcp = (pixpllcs << 3) | pixpllcp;
-
-	WREG_MISC_MASKED(MGAREG_MISC_CLKSEL_MGA, MGAREG_MISC_CLKSEL_MASK);
-
-	WREG_DAC(MGA1064_PIX_PLLC_M, xpixpllcm);
-	WREG_DAC(MGA1064_PIX_PLLC_N, xpixpllcn);
-	WREG_DAC(MGA1064_PIX_PLLC_P, xpixpllcp);
-}
-
-static int mgag200_pixpll_compute_g200se_04(struct mgag200_pll *pixpll, long clock,
-					    struct mgag200_pll_values *pixpllc)
-{
-	static const unsigned int vcomax = 1600000;
-	static const unsigned int vcomin = 800000;
-	static const unsigned int pllreffreq = 25000;
-	static const unsigned int pvalues_e4[] = {16, 14, 12, 10, 8, 6, 4, 2, 1};
-
-	unsigned int delta, tmpdelta, permitteddelta;
-	unsigned int testp, testm, testn;
-	unsigned int p, m, n, s;
-	unsigned int computed;
-	unsigned int fvv;
-	unsigned int i;
-
-	m = n = p = s = 0;
-	delta = 0xffffffff;
-
-	if (clock < 25000)
-		clock = 25000;
-	clock = clock * 2;
-
-	/* Permited delta is 0.5% as VESA Specification */
-	permitteddelta = clock * 5 / 1000;
-
-	for (i = 0 ; i < ARRAY_SIZE(pvalues_e4); i++) {
-		testp = pvalues_e4[i];
-
-		if ((clock * testp) > vcomax)
-			continue;
-		if ((clock * testp) < vcomin)
-			continue;
-
-		for (testn = 50; testn <= 256; testn++) {
-			for (testm = 1; testm <= 32; testm++) {
-				computed = (pllreffreq * testn) / (testm * testp);
-				if (computed > clock)
-					tmpdelta = computed - clock;
-				else
-					tmpdelta = clock - computed;
-
-				if (tmpdelta < delta) {
-					delta = tmpdelta;
-					m = testm;
-					n = testn;
-					p = testp;
-				}
-			}
-		}
-	}
-
-	fvv = pllreffreq * n / m;
-	fvv = (fvv - 800000) / 50000;
-	if (fvv > 15)
-		fvv = 15;
-	s = fvv << 1;
-
-	if (delta > permitteddelta) {
-		pr_warn("PLL delta too large\n");
-		return -EINVAL;
-	}
-
-	pixpllc->m = m;
-	pixpllc->n = n;
-	pixpllc->p = p;
-	pixpllc->s = s;
-
-	return 0;
-}
-
-static void mgag200_pixpll_update_g200se_04(struct mgag200_pll *pixpll,
-					    const struct mgag200_pll_values *pixpllc)
-{
-	unsigned int pixpllcm, pixpllcn, pixpllcp, pixpllcs;
-	u8 xpixpllcm, xpixpllcn, xpixpllcp;
-	struct mga_device *mdev = pixpll->mdev;
-
-	pixpllcm = pixpllc->m - 1;
-	pixpllcn = pixpllc->n - 1;
-	pixpllcp = pixpllc->p - 1;
-	pixpllcs = pixpllc->s;
-
-	xpixpllcm = pixpllcm | ((pixpllcn & BIT(8)) >> 1);
-	xpixpllcn = pixpllcn;
-	xpixpllcp = (pixpllcs << 3) | pixpllcp;
-
-	WREG_MISC_MASKED(MGAREG_MISC_CLKSEL_MGA, MGAREG_MISC_CLKSEL_MASK);
-
-	WREG_DAC(MGA1064_PIX_PLLC_M, xpixpllcm);
-	WREG_DAC(MGA1064_PIX_PLLC_N, xpixpllcn);
-	WREG_DAC(MGA1064_PIX_PLLC_P, xpixpllcp);
-
-	WREG_DAC(0x1a, 0x09);
-	msleep(20);
-	WREG_DAC(0x1a, 0x01);
-}
-
-static const struct mgag200_pll_funcs mgag200_pixpll_funcs_g200se_00 = {
-	.compute = mgag200_pixpll_compute_g200se_00,
-	.update = mgag200_pixpll_update_g200se_00,
-};
-
-static const struct mgag200_pll_funcs mgag200_pixpll_funcs_g200se_04 = {
-	.compute = mgag200_pixpll_compute_g200se_04,
-	.update = mgag200_pixpll_update_g200se_04,
-};
-
-/*
- * G200WB
- */
-
-static int mgag200_pixpll_compute_g200wb(struct mgag200_pll *pixpll, long clock,
-					 struct mgag200_pll_values *pixpllc)
-{
-	static const unsigned int vcomax = 550000;
-	static const unsigned int vcomin = 150000;
-	static const unsigned int pllreffreq = 48000;
-
-	unsigned int delta, tmpdelta;
-	unsigned int testp, testm, testn;
-	unsigned int p, m, n, s;
-	unsigned int computed;
-
-	m = n = p = s = 0;
-	delta = 0xffffffff;
-
-	for (testp = 1; testp < 9; testp++) {
-		if (clock * testp > vcomax)
-			continue;
-		if (clock * testp < vcomin)
-			continue;
-
-		for (testm = 1; testm < 17; testm++) {
-			for (testn = 1; testn < 151; testn++) {
-				computed = (pllreffreq * testn) / (testm * testp);
-				if (computed > clock)
-					tmpdelta = computed - clock;
-				else
-					tmpdelta = clock - computed;
-				if (tmpdelta < delta) {
-					delta = tmpdelta;
-					n = testn;
-					m = testm;
-					p = testp;
-					s = 0;
-				}
-			}
-		}
-	}
-
-	pixpllc->m = m;
-	pixpllc->n = n;
-	pixpllc->p = p;
-	pixpllc->s = s;
-
-	return 0;
-}
-
-static void
-mgag200_pixpll_update_g200wb(struct mgag200_pll *pixpll, const struct mgag200_pll_values *pixpllc)
-{
-	unsigned int pixpllcm, pixpllcn, pixpllcp, pixpllcs;
-	u8 xpixpllcm, xpixpllcn, xpixpllcp, tmp;
-	int i, j, tmpcount, vcount;
-	struct mga_device *mdev = pixpll->mdev;
-	bool pll_locked = false;
-
-	pixpllcm = pixpllc->m - 1;
-	pixpllcn = pixpllc->n - 1;
-	pixpllcp = pixpllc->p - 1;
-	pixpllcs = pixpllc->s;
-
-	xpixpllcm = ((pixpllcn & BIT(8)) >> 1) | pixpllcm;
-	xpixpllcn = pixpllcn;
-	xpixpllcp = ((pixpllcn & GENMASK(10, 9)) >> 3) | (pixpllcs << 3) | pixpllcp;
-
-	WREG_MISC_MASKED(MGAREG_MISC_CLKSEL_MGA, MGAREG_MISC_CLKSEL_MASK);
-
-	for (i = 0; i <= 32 && pll_locked == false; i++) {
-		if (i > 0) {
-			WREG8(MGAREG_CRTC_INDEX, 0x1e);
-			tmp = RREG8(MGAREG_CRTC_DATA);
-			if (tmp < 0xff)
-				WREG8(MGAREG_CRTC_DATA, tmp+1);
-		}
-
-		/* set pixclkdis to 1 */
-		WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
-		tmp = RREG8(DAC_DATA);
-		tmp |= MGA1064_PIX_CLK_CTL_CLK_DIS;
-		WREG8(DAC_DATA, tmp);
-
-		WREG8(DAC_INDEX, MGA1064_REMHEADCTL);
-		tmp = RREG8(DAC_DATA);
-		tmp |= MGA1064_REMHEADCTL_CLKDIS;
-		WREG8(DAC_DATA, tmp);
-
-		/* select PLL Set C */
-		tmp = RREG8(MGAREG_MEM_MISC_READ);
-		tmp |= 0x3 << 2;
-		WREG8(MGAREG_MEM_MISC_WRITE, tmp);
-
-		WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
-		tmp = RREG8(DAC_DATA);
-		tmp |= MGA1064_PIX_CLK_CTL_CLK_POW_DOWN | 0x80;
-		WREG8(DAC_DATA, tmp);
-
-		udelay(500);
-
-		/* reset the PLL */
-		WREG8(DAC_INDEX, MGA1064_VREF_CTL);
-		tmp = RREG8(DAC_DATA);
-		tmp &= ~0x04;
-		WREG8(DAC_DATA, tmp);
-
-		udelay(50);
-
-		/* program pixel pll register */
-		WREG_DAC(MGA1064_WB_PIX_PLLC_N, xpixpllcn);
-		WREG_DAC(MGA1064_WB_PIX_PLLC_M, xpixpllcm);
-		WREG_DAC(MGA1064_WB_PIX_PLLC_P, xpixpllcp);
-
-		udelay(50);
-
-		/* turn pll on */
-		WREG8(DAC_INDEX, MGA1064_VREF_CTL);
-		tmp = RREG8(DAC_DATA);
-		tmp |= 0x04;
-		WREG_DAC(MGA1064_VREF_CTL, tmp);
-
-		udelay(500);
-
-		/* select the pixel pll */
-		WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
-		tmp = RREG8(DAC_DATA);
-		tmp &= ~MGA1064_PIX_CLK_CTL_SEL_MSK;
-		tmp |= MGA1064_PIX_CLK_CTL_SEL_PLL;
-		WREG8(DAC_DATA, tmp);
-
-		WREG8(DAC_INDEX, MGA1064_REMHEADCTL);
-		tmp = RREG8(DAC_DATA);
-		tmp &= ~MGA1064_REMHEADCTL_CLKSL_MSK;
-		tmp |= MGA1064_REMHEADCTL_CLKSL_PLL;
-		WREG8(DAC_DATA, tmp);
-
-		/* reset dotclock rate bit */
-		WREG8(MGAREG_SEQ_INDEX, 1);
-		tmp = RREG8(MGAREG_SEQ_DATA);
-		tmp &= ~0x8;
-		WREG8(MGAREG_SEQ_DATA, tmp);
-
-		WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
-		tmp = RREG8(DAC_DATA);
-		tmp &= ~MGA1064_PIX_CLK_CTL_CLK_DIS;
-		WREG8(DAC_DATA, tmp);
-
-		vcount = RREG8(MGAREG_VCOUNT);
-
-		for (j = 0; j < 30 && pll_locked == false; j++) {
-			tmpcount = RREG8(MGAREG_VCOUNT);
-			if (tmpcount < vcount)
-				vcount = 0;
-			if ((tmpcount - vcount) > 2)
-				pll_locked = true;
-			else
-				udelay(5);
-		}
-	}
-
-	WREG8(DAC_INDEX, MGA1064_REMHEADCTL);
-	tmp = RREG8(DAC_DATA);
-	tmp &= ~MGA1064_REMHEADCTL_CLKDIS;
-	WREG_DAC(MGA1064_REMHEADCTL, tmp);
-}
-
-static const struct mgag200_pll_funcs mgag200_pixpll_funcs_g200wb = {
-	.compute = mgag200_pixpll_compute_g200wb,
-	.update = mgag200_pixpll_update_g200wb,
-};
-
-/*
- * G200EV
- */
-
-static int mgag200_pixpll_compute_g200ev(struct mgag200_pll *pixpll, long clock,
-					 struct mgag200_pll_values *pixpllc)
-{
-	static const unsigned int vcomax = 550000;
-	static const unsigned int vcomin = 150000;
-	static const unsigned int pllreffreq = 50000;
-
-	unsigned int delta, tmpdelta;
-	unsigned int testp, testm, testn;
-	unsigned int p, m, n, s;
-	unsigned int computed;
-
-	m = n = p = s = 0;
-	delta = 0xffffffff;
-
-	for (testp = 16; testp > 0; testp--) {
-		if (clock * testp > vcomax)
-			continue;
-		if (clock * testp < vcomin)
-			continue;
-
-		for (testn = 1; testn < 257; testn++) {
-			for (testm = 1; testm < 17; testm++) {
-				computed = (pllreffreq * testn) /
-					(testm * testp);
-				if (computed > clock)
-					tmpdelta = computed - clock;
-				else
-					tmpdelta = clock - computed;
-				if (tmpdelta < delta) {
-					delta = tmpdelta;
-					n = testn;
-					m = testm;
-					p = testp;
-				}
-			}
-		}
-	}
-
-	pixpllc->m = m;
-	pixpllc->n = n;
-	pixpllc->p = p;
-	pixpllc->s = s;
-
-	return 0;
-}
-
-static void
-mgag200_pixpll_update_g200ev(struct mgag200_pll *pixpll, const struct mgag200_pll_values *pixpllc)
-{
-	unsigned int pixpllcm, pixpllcn, pixpllcp, pixpllcs;
-	u8 xpixpllcm, xpixpllcn, xpixpllcp, tmp;
-	struct mga_device *mdev = pixpll->mdev;
-
-	pixpllcm = pixpllc->m - 1;
-	pixpllcn = pixpllc->n - 1;
-	pixpllcp = pixpllc->p - 1;
-	pixpllcs = pixpllc->s;
-
-	xpixpllcm = pixpllcm;
-	xpixpllcn = pixpllcn;
-	xpixpllcp = (pixpllcs << 3) | pixpllcp;
-
-	WREG_MISC_MASKED(MGAREG_MISC_CLKSEL_MGA, MGAREG_MISC_CLKSEL_MASK);
-
-	WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
-	tmp = RREG8(DAC_DATA);
-	tmp |= MGA1064_PIX_CLK_CTL_CLK_DIS;
-	WREG8(DAC_DATA, tmp);
-
-	tmp = RREG8(MGAREG_MEM_MISC_READ);
-	tmp |= 0x3 << 2;
-	WREG8(MGAREG_MEM_MISC_WRITE, tmp);
-
-	WREG8(DAC_INDEX, MGA1064_PIX_PLL_STAT);
-	tmp = RREG8(DAC_DATA);
-	WREG8(DAC_DATA, tmp & ~0x40);
-
-	WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
-	tmp = RREG8(DAC_DATA);
-	tmp |= MGA1064_PIX_CLK_CTL_CLK_POW_DOWN;
-	WREG8(DAC_DATA, tmp);
-
-	WREG_DAC(MGA1064_EV_PIX_PLLC_M, xpixpllcm);
-	WREG_DAC(MGA1064_EV_PIX_PLLC_N, xpixpllcn);
-	WREG_DAC(MGA1064_EV_PIX_PLLC_P, xpixpllcp);
-
-	udelay(50);
-
-	WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
-	tmp = RREG8(DAC_DATA);
-	tmp &= ~MGA1064_PIX_CLK_CTL_CLK_POW_DOWN;
-	WREG8(DAC_DATA, tmp);
-
-	udelay(500);
-
-	WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
-	tmp = RREG8(DAC_DATA);
-	tmp &= ~MGA1064_PIX_CLK_CTL_SEL_MSK;
-	tmp |= MGA1064_PIX_CLK_CTL_SEL_PLL;
-	WREG8(DAC_DATA, tmp);
-
-	WREG8(DAC_INDEX, MGA1064_PIX_PLL_STAT);
-	tmp = RREG8(DAC_DATA);
-	WREG8(DAC_DATA, tmp | 0x40);
-
-	tmp = RREG8(MGAREG_MEM_MISC_READ);
-	tmp |= (0x3 << 2);
-	WREG8(MGAREG_MEM_MISC_WRITE, tmp);
-
-	WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
-	tmp = RREG8(DAC_DATA);
-	tmp &= ~MGA1064_PIX_CLK_CTL_CLK_DIS;
-	WREG8(DAC_DATA, tmp);
-}
-
-static const struct mgag200_pll_funcs mgag200_pixpll_funcs_g200ev = {
-	.compute = mgag200_pixpll_compute_g200ev,
-	.update = mgag200_pixpll_update_g200ev,
-};
-
-/*
- * G200EH
- */
-
-static int mgag200_pixpll_compute_g200eh(struct mgag200_pll *pixpll, long clock,
-					 struct mgag200_pll_values *pixpllc)
-{
-	static const unsigned int vcomax = 800000;
-	static const unsigned int vcomin = 400000;
-	static const unsigned int pllreffreq = 33333;
-
-	unsigned int delta, tmpdelta;
-	unsigned int testp, testm, testn;
-	unsigned int p, m, n, s;
-	unsigned int computed;
-
-	m = n = p = s = 0;
-	delta = 0xffffffff;
-
-	for (testp = 16; testp > 0; testp >>= 1) {
-		if (clock * testp > vcomax)
-			continue;
-		if (clock * testp < vcomin)
-			continue;
-
-		for (testm = 1; testm < 33; testm++) {
-			for (testn = 17; testn < 257; testn++) {
-				computed = (pllreffreq * testn) / (testm * testp);
-				if (computed > clock)
-					tmpdelta = computed - clock;
-				else
-					tmpdelta = clock - computed;
-				if (tmpdelta < delta) {
-					delta = tmpdelta;
-					n = testn;
-					m = testm;
-					p = testp;
-				}
-			}
-		}
-	}
-
-	pixpllc->m = m;
-	pixpllc->n = n;
-	pixpllc->p = p;
-	pixpllc->s = s;
-
-	return 0;
-}
-
-static void
-mgag200_pixpll_update_g200eh(struct mgag200_pll *pixpll, const struct mgag200_pll_values *pixpllc)
-{
-	unsigned int pixpllcm, pixpllcn, pixpllcp, pixpllcs;
-	u8 xpixpllcm, xpixpllcn, xpixpllcp, tmp;
-	int i, j, tmpcount, vcount;
-	struct mga_device *mdev = pixpll->mdev;
-	bool pll_locked = false;
-
-	pixpllcm = pixpllc->m - 1;
-	pixpllcn = pixpllc->n - 1;
-	pixpllcp = pixpllc->p - 1;
-	pixpllcs = pixpllc->s;
-
-	xpixpllcm = ((pixpllcn & BIT(8)) >> 1) | pixpllcm;
-	xpixpllcn = pixpllcn;
-	xpixpllcp = (pixpllcs << 3) | pixpllcp;
-
-	WREG_MISC_MASKED(MGAREG_MISC_CLKSEL_MGA, MGAREG_MISC_CLKSEL_MASK);
-
-	for (i = 0; i <= 32 && pll_locked == false; i++) {
-		WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
-		tmp = RREG8(DAC_DATA);
-		tmp |= MGA1064_PIX_CLK_CTL_CLK_DIS;
-		WREG8(DAC_DATA, tmp);
-
-		tmp = RREG8(MGAREG_MEM_MISC_READ);
-		tmp |= 0x3 << 2;
-		WREG8(MGAREG_MEM_MISC_WRITE, tmp);
-
-		WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
-		tmp = RREG8(DAC_DATA);
-		tmp |= MGA1064_PIX_CLK_CTL_CLK_POW_DOWN;
-		WREG8(DAC_DATA, tmp);
-
-		udelay(500);
-
-		WREG_DAC(MGA1064_EH_PIX_PLLC_M, xpixpllcm);
-		WREG_DAC(MGA1064_EH_PIX_PLLC_N, xpixpllcn);
-		WREG_DAC(MGA1064_EH_PIX_PLLC_P, xpixpllcp);
-
-		udelay(500);
-
-		WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
-		tmp = RREG8(DAC_DATA);
-		tmp &= ~MGA1064_PIX_CLK_CTL_SEL_MSK;
-		tmp |= MGA1064_PIX_CLK_CTL_SEL_PLL;
-		WREG8(DAC_DATA, tmp);
-
-		WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
-		tmp = RREG8(DAC_DATA);
-		tmp &= ~MGA1064_PIX_CLK_CTL_CLK_DIS;
-		tmp &= ~MGA1064_PIX_CLK_CTL_CLK_POW_DOWN;
-		WREG8(DAC_DATA, tmp);
-
-		vcount = RREG8(MGAREG_VCOUNT);
-
-		for (j = 0; j < 30 && pll_locked == false; j++) {
-			tmpcount = RREG8(MGAREG_VCOUNT);
-			if (tmpcount < vcount)
-				vcount = 0;
-			if ((tmpcount - vcount) > 2)
-				pll_locked = true;
-			else
-				udelay(5);
-		}
-	}
-}
-
-static const struct mgag200_pll_funcs mgag200_pixpll_funcs_g200eh = {
-	.compute = mgag200_pixpll_compute_g200eh,
-	.update = mgag200_pixpll_update_g200eh,
-};
-
-/*
- * G200EH3
- */
-
-static int mgag200_pixpll_compute_g200eh3(struct mgag200_pll *pixpll, long clock,
-					  struct mgag200_pll_values *pixpllc)
-{
-	static const unsigned int vcomax = 3000000;
-	static const unsigned int vcomin = 1500000;
-	static const unsigned int pllreffreq = 25000;
-
-	unsigned int delta, tmpdelta;
-	unsigned int testp, testm, testn;
-	unsigned int p, m, n, s;
-	unsigned int computed;
-
-	m = n = p = s = 0;
-	delta = 0xffffffff;
-	testp = 0;
-
-	for (testm = 150; testm >= 6; testm--) {
-		if (clock * testm > vcomax)
-			continue;
-		if (clock * testm < vcomin)
-			continue;
-		for (testn = 120; testn >= 60; testn--) {
-			computed = (pllreffreq * testn) / testm;
-			if (computed > clock)
-				tmpdelta = computed - clock;
-			else
-				tmpdelta = clock - computed;
-			if (tmpdelta < delta) {
-				delta = tmpdelta;
-				n = testn + 1;
-				m = testm + 1;
-				p = testp + 1;
-			}
-			if (delta == 0)
-				break;
-		}
-		if (delta == 0)
-			break;
-	}
-
-	pixpllc->m = m;
-	pixpllc->n = n;
-	pixpllc->p = p;
-	pixpllc->s = s;
-
-	return 0;
-}
-
-static const struct mgag200_pll_funcs mgag200_pixpll_funcs_g200eh3 = {
-	.compute = mgag200_pixpll_compute_g200eh3,
-	.update = mgag200_pixpll_update_g200eh, // same as G200EH
-};
-
-/*
- * G200ER
- */
-
-static int mgag200_pixpll_compute_g200er(struct mgag200_pll *pixpll, long clock,
-					 struct mgag200_pll_values *pixpllc)
-{
-	static const unsigned int vcomax = 1488000;
-	static const unsigned int vcomin = 1056000;
-	static const unsigned int pllreffreq = 48000;
-	static const unsigned int m_div_val[] = { 1, 2, 4, 8 };
-
-	unsigned int delta, tmpdelta;
-	int testr, testn, testm, testo;
-	unsigned int p, m, n, s;
-	unsigned int computed, vco;
-
-	m = n = p = s = 0;
-	delta = 0xffffffff;
-
-	for (testr = 0; testr < 4; testr++) {
-		if (delta == 0)
-			break;
-		for (testn = 5; testn < 129; testn++) {
-			if (delta == 0)
-				break;
-			for (testm = 3; testm >= 0; testm--) {
-				if (delta == 0)
-					break;
-				for (testo = 5; testo < 33; testo++) {
-					vco = pllreffreq * (testn + 1) /
-						(testr + 1);
-					if (vco < vcomin)
-						continue;
-					if (vco > vcomax)
-						continue;
-					computed = vco / (m_div_val[testm] * (testo + 1));
-					if (computed > clock)
-						tmpdelta = computed - clock;
-					else
-						tmpdelta = clock - computed;
-					if (tmpdelta < delta) {
-						delta = tmpdelta;
-						m = (testm | (testo << 3)) + 1;
-						n = testn + 1;
-						p = testr + 1;
-						s = testr;
-					}
-				}
-			}
-		}
-	}
-
-	pixpllc->m = m;
-	pixpllc->n = n;
-	pixpllc->p = p;
-	pixpllc->s = s;
-
-	return 0;
-}
-
-static void
-mgag200_pixpll_update_g200er(struct mgag200_pll *pixpll, const struct mgag200_pll_values *pixpllc)
-{
-	unsigned int pixpllcm, pixpllcn, pixpllcp, pixpllcs;
-	u8 xpixpllcm, xpixpllcn, xpixpllcp, tmp;
-	struct mga_device *mdev = pixpll->mdev;
-
-	pixpllcm = pixpllc->m - 1;
-	pixpllcn = pixpllc->n - 1;
-	pixpllcp = pixpllc->p - 1;
-	pixpllcs = pixpllc->s;
-
-	xpixpllcm = pixpllcm;
-	xpixpllcn = pixpllcn;
-	xpixpllcp = (pixpllcs << 3) | pixpllcp;
-
-	WREG_MISC_MASKED(MGAREG_MISC_CLKSEL_MGA, MGAREG_MISC_CLKSEL_MASK);
-
-	WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
-	tmp = RREG8(DAC_DATA);
-	tmp |= MGA1064_PIX_CLK_CTL_CLK_DIS;
-	WREG8(DAC_DATA, tmp);
-
-	WREG8(DAC_INDEX, MGA1064_REMHEADCTL);
-	tmp = RREG8(DAC_DATA);
-	tmp |= MGA1064_REMHEADCTL_CLKDIS;
-	WREG8(DAC_DATA, tmp);
-
-	tmp = RREG8(MGAREG_MEM_MISC_READ);
-	tmp |= (0x3<<2) | 0xc0;
-	WREG8(MGAREG_MEM_MISC_WRITE, tmp);
-
-	WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
-	tmp = RREG8(DAC_DATA);
-	tmp &= ~MGA1064_PIX_CLK_CTL_CLK_DIS;
-	tmp |= MGA1064_PIX_CLK_CTL_CLK_POW_DOWN;
-	WREG8(DAC_DATA, tmp);
-
-	udelay(500);
-
-	WREG_DAC(MGA1064_ER_PIX_PLLC_N, xpixpllcn);
-	WREG_DAC(MGA1064_ER_PIX_PLLC_M, xpixpllcm);
-	WREG_DAC(MGA1064_ER_PIX_PLLC_P, xpixpllcp);
-
-	udelay(50);
-}
-
-static const struct mgag200_pll_funcs mgag200_pixpll_funcs_g200er = {
-	.compute = mgag200_pixpll_compute_g200er,
-	.update = mgag200_pixpll_update_g200er,
-};
-
-/*
- * G200EW3
- */
-
-static int mgag200_pixpll_compute_g200ew3(struct mgag200_pll *pixpll, long clock,
-					  struct mgag200_pll_values *pixpllc)
-{
-	static const unsigned int vcomax = 800000;
-	static const unsigned int vcomin = 400000;
-	static const unsigned int pllreffreq = 25000;
-
-	unsigned int delta, tmpdelta;
-	unsigned int testp, testm, testn, testp2;
-	unsigned int p, m, n, s;
-	unsigned int computed;
-
-	m = n = p = s = 0;
-	delta = 0xffffffff;
-
-	for (testp = 1; testp < 8; testp++) {
-		for (testp2 = 1; testp2 < 8; testp2++) {
-			if (testp < testp2)
-				continue;
-			if ((clock * testp * testp2) > vcomax)
-				continue;
-			if ((clock * testp * testp2) < vcomin)
-				continue;
-			for (testm = 1; testm < 26; testm++) {
-				for (testn = 32; testn < 2048 ; testn++) {
-					computed = (pllreffreq * testn) / (testm * testp * testp2);
-					if (computed > clock)
-						tmpdelta = computed - clock;
-					else
-						tmpdelta = clock - computed;
-					if (tmpdelta < delta) {
-						delta = tmpdelta;
-						m = testm + 1;
-						n = testn + 1;
-						p = testp + 1;
-						s = testp2;
-					}
-				}
-			}
-		}
-	}
-
-	pixpllc->m = m;
-	pixpllc->n = n;
-	pixpllc->p = p;
-	pixpllc->s = s;
-
-	return 0;
-}
-
-static const struct mgag200_pll_funcs mgag200_pixpll_funcs_g200ew3 = {
-	.compute = mgag200_pixpll_compute_g200ew3,
-	.update = mgag200_pixpll_update_g200wb, // same as G200WB
-};
-
-/*
- * PLL initialization
- */
-
-int mgag200_pixpll_init(struct mgag200_pll *pixpll, struct mga_device *mdev)
-{
-	struct drm_device *dev = &mdev->base;
-	struct mgag200_g200se_device *g200se;
-
-	pixpll->mdev = mdev;
-
-	switch (mdev->type) {
-	case G200_PCI:
-	case G200_AGP:
-		pixpll->funcs = &mgag200_pixpll_funcs_g200;
-		break;
-	case G200_SE_A:
-	case G200_SE_B:
-		g200se = to_mgag200_g200se_device(dev);
-
-		if (g200se->unique_rev_id >= 0x04)
-			pixpll->funcs = &mgag200_pixpll_funcs_g200se_04;
-		else
-			pixpll->funcs = &mgag200_pixpll_funcs_g200se_00;
-		break;
-	case G200_WB:
-		pixpll->funcs = &mgag200_pixpll_funcs_g200wb;
-		break;
-	case G200_EV:
-		pixpll->funcs = &mgag200_pixpll_funcs_g200ev;
-		break;
-	case G200_EH:
-		pixpll->funcs = &mgag200_pixpll_funcs_g200eh;
-		break;
-	case G200_EH3:
-		pixpll->funcs = &mgag200_pixpll_funcs_g200eh3;
-		break;
-	case G200_ER:
-		pixpll->funcs = &mgag200_pixpll_funcs_g200er;
-		break;
-	case G200_EW3:
-		pixpll->funcs = &mgag200_pixpll_funcs_g200ew3;
-		break;
-	default:
-		drm_err(dev, "unknown device type %d\n", mdev->type);
-		return -ENODEV;
-	}
-
-	return 0;
-}