tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0-only
2
3#include <linux/pci.h>
4
5#include <drm/drm_atomic.h>
6#include <drm/drm_atomic_helper.h>
7#include <drm/drm_drv.h>
8#include <drm/drm_gem_atomic_helper.h>
9#include <drm/drm_print.h>
10#include <drm/drm_probe_helper.h>
11
12#include "mgag200_drv.h"
13
14/*
15 * PIXPLLC
16 */
17
18static int mgag200_g200eh3_pixpllc_atomic_check(struct drm_crtc *crtc,
19 struct drm_atomic_state *new_state)
20{
21 static const unsigned int vcomax = 3000000;
22 static const unsigned int vcomin = 1500000;
23 static const unsigned int pllreffreq = 25000;
24
25 struct drm_crtc_state *new_crtc_state = drm_atomic_get_new_crtc_state(new_state, crtc);
26 struct mgag200_crtc_state *new_mgag200_crtc_state = to_mgag200_crtc_state(new_crtc_state);
27 long clock = new_crtc_state->mode.clock;
28 struct mgag200_pll_values *pixpllc = &new_mgag200_crtc_state->pixpllc;
29 unsigned int delta, tmpdelta;
30 unsigned int testp, testm, testn;
31 unsigned int p, m, n, s;
32 unsigned int computed;
33
34 m = n = p = s = 0;
35 delta = 0xffffffff;
36 testp = 0;
37
38 for (testm = 150; testm >= 6; testm--) {
39 if (clock * testm > vcomax)
40 continue;
41 if (clock * testm < vcomin)
42 continue;
43 for (testn = 120; testn >= 60; testn--) {
44 computed = (pllreffreq * testn) / testm;
45 if (computed > clock)
46 tmpdelta = computed - clock;
47 else
48 tmpdelta = clock - computed;
49 if (tmpdelta < delta) {
50 delta = tmpdelta;
51 n = testn + 1;
52 m = testm + 1;
53 p = testp + 1;
54 }
55 if (delta == 0)
56 break;
57 }
58 if (delta == 0)
59 break;
60 }
61
62 pixpllc->m = m;
63 pixpllc->n = n;
64 pixpllc->p = p;
65 pixpllc->s = s;
66
67 return 0;
68}
69
70/*
71 * Mode-setting pipeline
72 */
73
74static const struct drm_plane_helper_funcs mgag200_g200eh3_primary_plane_helper_funcs = {
75 MGAG200_PRIMARY_PLANE_HELPER_FUNCS,
76};
77
78static const struct drm_plane_funcs mgag200_g200eh3_primary_plane_funcs = {
79 MGAG200_PRIMARY_PLANE_FUNCS,
80};
81
82static const struct drm_crtc_helper_funcs mgag200_g200eh3_crtc_helper_funcs = {
83 MGAG200_CRTC_HELPER_FUNCS,
84};
85
86static const struct drm_crtc_funcs mgag200_g200eh3_crtc_funcs = {
87 MGAG200_CRTC_FUNCS,
88};
89
90static int mgag200_g200eh3_pipeline_init(struct mga_device *mdev)
91{
92 struct drm_device *dev = &mdev->base;
93 struct drm_plane *primary_plane = &mdev->primary_plane;
94 struct drm_crtc *crtc = &mdev->crtc;
95 int ret;
96
97 ret = drm_universal_plane_init(dev, primary_plane, 0,
98 &mgag200_g200eh3_primary_plane_funcs,
99 mgag200_primary_plane_formats,
100 mgag200_primary_plane_formats_size,
101 mgag200_primary_plane_fmtmods,
102 DRM_PLANE_TYPE_PRIMARY, NULL);
103 if (ret) {
104 drm_err(dev, "drm_universal_plane_init() failed: %d\n", ret);
105 return ret;
106 }
107 drm_plane_helper_add(primary_plane, &mgag200_g200eh3_primary_plane_helper_funcs);
108 drm_plane_enable_fb_damage_clips(primary_plane);
109
110 ret = drm_crtc_init_with_planes(dev, crtc, primary_plane, NULL,
111 &mgag200_g200eh3_crtc_funcs, NULL);
112 if (ret) {
113 drm_err(dev, "drm_crtc_init_with_planes() failed: %d\n", ret);
114 return ret;
115 }
116 drm_crtc_helper_add(crtc, &mgag200_g200eh3_crtc_helper_funcs);
117
118 /* FIXME: legacy gamma tables, but atomic gamma doesn't work without */
119 drm_mode_crtc_set_gamma_size(crtc, MGAG200_LUT_SIZE);
120 drm_crtc_enable_color_mgmt(crtc, 0, false, MGAG200_LUT_SIZE);
121
122 ret = mgag200_vga_bmc_output_init(mdev);
123 if (ret)
124 return ret;
125
126 return 0;
127}
128
129/*
130 * DRM device
131 */
132
133static const struct mgag200_device_info mgag200_g200eh3_device_info =
134 MGAG200_DEVICE_INFO_INIT(2048, 2048, 0, false, 1, 0, false);
135
136static const struct mgag200_device_funcs mgag200_g200eh3_device_funcs = {
137 .pixpllc_atomic_check = mgag200_g200eh3_pixpllc_atomic_check,
138 .pixpllc_atomic_update = mgag200_g200eh_pixpllc_atomic_update, // same as G200EH
139};
140
141struct mga_device *mgag200_g200eh3_device_create(struct pci_dev *pdev,
142 const struct drm_driver *drv)
143{
144 struct mga_device *mdev;
145 struct drm_device *dev;
146 resource_size_t vram_available;
147 int ret;
148
149 mdev = devm_drm_dev_alloc(&pdev->dev, drv, struct mga_device, base);
150 if (IS_ERR(mdev))
151 return mdev;
152 dev = &mdev->base;
153
154 pci_set_drvdata(pdev, dev);
155
156 ret = mgag200_init_pci_options(pdev, 0x00000120, 0x0000b000);
157 if (ret)
158 return ERR_PTR(ret);
159
160 ret = mgag200_device_preinit(mdev);
161 if (ret)
162 return ERR_PTR(ret);
163
164 ret = mgag200_device_init(mdev, &mgag200_g200eh3_device_info,
165 &mgag200_g200eh3_device_funcs);
166 if (ret)
167 return ERR_PTR(ret);
168
169 mgag200_g200eh_init_registers(mdev); // same as G200EH
170
171 vram_available = mgag200_device_probe_vram(mdev);
172
173 ret = mgag200_mode_config_init(mdev, vram_available);
174 if (ret)
175 return ERR_PTR(ret);
176
177 ret = mgag200_g200eh3_pipeline_init(mdev);
178 if (ret)
179 return ERR_PTR(ret);
180
181 drm_mode_config_reset(dev);
182 drm_kms_helper_poll_init(dev);
183
184 return mdev;
185}