drm/radeon/cik: add hw cursor support (v2)

CIK (DCE8) hw cursors are programmed the same as evergreen
(DCE4) with the following caveats:
- cursors are now 128x128 pixels
- new alpha blend enable bit

v2: rebase

Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/radeon/cik_reg.h

···
+/*
+ * Copyright 2012 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Alex Deucher
+ */
+#ifndef __CIK_REG_H__
+#define __CIK_REG_H__
+
+#define CIK_DC_GPIO_HPD_MASK                      0x65b0
+#define CIK_DC_GPIO_HPD_A                         0x65b4
+#define CIK_DC_GPIO_HPD_EN                        0x65b8
+#define CIK_DC_GPIO_HPD_Y                         0x65bc
+
+/* CUR blocks at 0x6998, 0x7598, 0x10198, 0x10d98, 0x11998, 0x12598 */
+#define CIK_CUR_CONTROL                           0x6998
+#       define CIK_CURSOR_EN                      (1 << 0)
+#       define CIK_CURSOR_MODE(x)                 (((x) & 0x3) << 8)
+#       define CIK_CURSOR_MONO                    0
+#       define CIK_CURSOR_24_1                    1
+#       define CIK_CURSOR_24_8_PRE_MULT           2
+#       define CIK_CURSOR_24_8_UNPRE_MULT         3
+#       define CIK_CURSOR_2X_MAGNIFY              (1 << 16)
+#       define CIK_CURSOR_FORCE_MC_ON             (1 << 20)
+#       define CIK_CURSOR_URGENT_CONTROL(x)       (((x) & 0x7) << 24)
+#       define CIK_CURSOR_URGENT_ALWAYS           0
+#       define CIK_CURSOR_URGENT_1_8              1
+#       define CIK_CURSOR_URGENT_1_4              2
+#       define CIK_CURSOR_URGENT_3_8              3
+#       define CIK_CURSOR_URGENT_1_2              4
+#define CIK_CUR_SURFACE_ADDRESS                   0x699c
+#       define CIK_CUR_SURFACE_ADDRESS_MASK       0xfffff000
+#define CIK_CUR_SIZE                              0x69a0
+#define CIK_CUR_SURFACE_ADDRESS_HIGH              0x69a4
+#define CIK_CUR_POSITION                          0x69a8
+#define CIK_CUR_HOT_SPOT                          0x69ac
+#define CIK_CUR_COLOR1                            0x69b0
+#define CIK_CUR_COLOR2                            0x69b4
+#define CIK_CUR_UPDATE                            0x69b8
+#       define CIK_CURSOR_UPDATE_PENDING          (1 << 0)
+#       define CIK_CURSOR_UPDATE_TAKEN            (1 << 1)
+#       define CIK_CURSOR_UPDATE_LOCK             (1 << 16)
+#       define CIK_CURSOR_DISABLE_MULTIPLE_UPDATE (1 << 24)
+
+#define CIK_ALPHA_CONTROL                         0x6af0
+#       define CIK_CURSOR_ALPHA_BLND_ENA          (1 << 1)
+
+#endif

drivers/gpu/drm/radeon/radeon.h

···
 #define RADEON_RESET_MC				(1 << 10)
 #define RADEON_RESET_DISPLAY			(1 << 11)
 
+/* max cursor sizes (in pixels) */
+#define CURSOR_WIDTH 64
+#define CURSOR_HEIGHT 64
+
+#define CIK_CURSOR_WIDTH 128
+#define CIK_CURSOR_HEIGHT 128
+
 /*
  * Errata workarounds.
  */

drivers/gpu/drm/radeon/radeon_cursor.c

···
 #include <drm/radeon_drm.h>
 #include "radeon.h"
 
-#define CURSOR_WIDTH 64
-#define CURSOR_HEIGHT 64
-
 static void radeon_lock_cursor(struct drm_crtc *crtc, bool lock)
 {
 	struct radeon_device *rdev = crtc->dev->dev_private;
···
 		goto unpin;
 	}
 
-	if ((width > CURSOR_WIDTH) || (height > CURSOR_HEIGHT)) {
+	if ((width > radeon_crtc->max_cursor_width) ||
+	    (height > radeon_crtc->max_cursor_height)) {
 		DRM_ERROR("bad cursor width or height %d x %d\n", width, height);
 		return -EINVAL;
 	}
···
 	DRM_DEBUG("x %d y %d c->x %d c->y %d\n", x, y, crtc->x, crtc->y);
 
 	if (x < 0) {
-		xorigin = min(-x, CURSOR_WIDTH - 1);
+		xorigin = min(-x, radeon_crtc->max_cursor_width - 1);
 		x = 0;
 	}
 	if (y < 0) {
-		yorigin = min(-y, CURSOR_HEIGHT - 1);
+		yorigin = min(-y, radeon_crtc->max_cursor_height - 1);
 		y = 0;
 	}
 

drivers/gpu/drm/radeon/radeon_display.c

···
 		NI_OUTPUT_CSC_OVL_MODE(NI_OUTPUT_CSC_BYPASS)));
 	/* XXX match this to the depth of the crtc fmt block, move to modeset? */
 	WREG32(0x6940 + radeon_crtc->crtc_offset, 0);
-
+	if (ASIC_IS_DCE8(rdev)) {
+		/* XXX this only needs to be programmed once per crtc at startup,
+		 * not sure where the best place for it is
+		 */
+		WREG32(CIK_ALPHA_CONTROL + radeon_crtc->crtc_offset,
+		       CIK_CURSOR_ALPHA_BLND_ENA);
+	}
 }
 
 static void legacy_crtc_load_lut(struct drm_crtc *crtc)
···
 	drm_mode_crtc_set_gamma_size(&radeon_crtc->base, 256);
 	radeon_crtc->crtc_id = index;
 	rdev->mode_info.crtcs[index] = radeon_crtc;
+
+	if (rdev->family >= CHIP_BONAIRE) {
+		radeon_crtc->max_cursor_width = CIK_CURSOR_WIDTH;
+		radeon_crtc->max_cursor_height = CIK_CURSOR_HEIGHT;
+	} else {
+		radeon_crtc->max_cursor_width = CURSOR_WIDTH;
+		radeon_crtc->max_cursor_height = CURSOR_HEIGHT;
+	}
 
 #if 0
 	radeon_crtc->mode_set.crtc = &radeon_crtc->base;

drivers/gpu/drm/radeon/radeon_mode.h

···
 	uint64_t cursor_addr;
 	int cursor_width;
 	int cursor_height;
+	int max_cursor_width;
+	int max_cursor_height;
 	uint32_t legacy_display_base_addr;
 	uint32_t legacy_cursor_offset;
 	enum radeon_rmx_type rmx_type;

drivers/gpu/drm/radeon/radeon_reg.h

···
 #include "evergreen_reg.h"
 #include "ni_reg.h"
 #include "si_reg.h"
+#include "cik_reg.h"
 
 #define RADEON_MC_AGP_LOCATION		0x014c
 #define		RADEON_MC_AGP_START_MASK	0x0000FFFF