1 /*
2 * Copyright 2013 Matrox Graphics
3 *
4 * This file is subject to the terms and conditions of the GNU General
5 * Public License version 2. See the file COPYING in the main
6 * directory of this archive for more details.
7 *
8 * Author: Christopher Harvey <charvey@matrox.com>
9 */
10
11 #include <drm/drmP.h>
12 #include "mgag200_drv.h"
13
14 static bool warn_transparent = true;
15 static bool warn_palette = true;
16
17 /*
18 Hide the cursor off screen. We can't disable the cursor hardware because it
19 takes too long to re-activate and causes momentary corruption
20 */
mga_hide_cursor(struct mga_device * mdev)21 static void mga_hide_cursor(struct mga_device *mdev)
22 {
23 WREG8(MGA_CURPOSXL, 0);
24 WREG8(MGA_CURPOSXH, 0);
25 if (mdev->cursor.pixels_1->pin_count)
26 mgag200_bo_unpin(mdev->cursor.pixels_1);
27 if (mdev->cursor.pixels_2->pin_count)
28 mgag200_bo_unpin(mdev->cursor.pixels_2);
29 }
30
mga_crtc_cursor_set(struct drm_crtc * crtc,struct drm_file * file_priv,uint32_t handle,uint32_t width,uint32_t height)31 int mga_crtc_cursor_set(struct drm_crtc *crtc,
32 struct drm_file *file_priv,
33 uint32_t handle,
34 uint32_t width,
35 uint32_t height)
36 {
37 struct drm_device *dev = crtc->dev;
38 struct mga_device *mdev = (struct mga_device *)dev->dev_private;
39 struct mgag200_bo *pixels_1 = mdev->cursor.pixels_1;
40 struct mgag200_bo *pixels_2 = mdev->cursor.pixels_2;
41 struct mgag200_bo *pixels_current = mdev->cursor.pixels_current;
42 struct mgag200_bo *pixels_prev = mdev->cursor.pixels_prev;
43 struct drm_gem_object *obj;
44 struct mgag200_bo *bo = NULL;
45 int ret = 0;
46 unsigned int i, row, col;
47 uint32_t colour_set[16];
48 uint32_t *next_space = &colour_set[0];
49 uint32_t *palette_iter;
50 uint32_t this_colour;
51 bool found = false;
52 int colour_count = 0;
53 u64 gpu_addr;
54 u8 reg_index;
55 u8 this_row[48];
56
57 if (!pixels_1 || !pixels_2) {
58 WREG8(MGA_CURPOSXL, 0);
59 WREG8(MGA_CURPOSXH, 0);
60 return -ENOTSUPP; /* Didn't allocate space for cursors */
61 }
62
63 if ((width != 64 || height != 64) && handle) {
64 WREG8(MGA_CURPOSXL, 0);
65 WREG8(MGA_CURPOSXH, 0);
66 return -EINVAL;
67 }
68
69 BUG_ON(pixels_1 != pixels_current && pixels_1 != pixels_prev);
70 BUG_ON(pixels_2 != pixels_current && pixels_2 != pixels_prev);
71 BUG_ON(pixels_current == pixels_prev);
72
73 if (!handle || !file_priv) {
74 mga_hide_cursor(mdev);
75 return 0;
76 }
77
78 obj = drm_gem_object_lookup(dev, file_priv, handle);
79 if (!obj)
80 return -ENOENT;
81
82 ret = mgag200_bo_reserve(pixels_1, true);
83 if (ret) {
84 WREG8(MGA_CURPOSXL, 0);
85 WREG8(MGA_CURPOSXH, 0);
86 goto out_unref;
87 }
88 ret = mgag200_bo_reserve(pixels_2, true);
89 if (ret) {
90 WREG8(MGA_CURPOSXL, 0);
91 WREG8(MGA_CURPOSXH, 0);
92 mgag200_bo_unreserve(pixels_1);
93 goto out_unreserve1;
94 }
95
96 /* Move cursor buffers into VRAM if they aren't already */
97 if (!pixels_1->pin_count) {
98 ret = mgag200_bo_pin(pixels_1, TTM_PL_FLAG_VRAM,
99 &mdev->cursor.pixels_1_gpu_addr);
100 if (ret)
101 goto out1;
102 }
103 if (!pixels_2->pin_count) {
104 ret = mgag200_bo_pin(pixels_2, TTM_PL_FLAG_VRAM,
105 &mdev->cursor.pixels_2_gpu_addr);
106 if (ret) {
107 mgag200_bo_unpin(pixels_1);
108 goto out1;
109 }
110 }
111
112 bo = gem_to_mga_bo(obj);
113 ret = mgag200_bo_reserve(bo, true);
114 if (ret) {
115 dev_err(&dev->pdev->dev, "failed to reserve user bo\n");
116 goto out1;
117 }
118 if (!bo->kmap.virtual) {
119 ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
120 if (ret) {
121 dev_err(&dev->pdev->dev, "failed to kmap user buffer updates\n");
122 goto out2;
123 }
124 }
125
126 memset(&colour_set[0], 0, sizeof(uint32_t)*16);
127 /* width*height*4 = 16384 */
128 for (i = 0; i < 16384; i += 4) {
129 this_colour = ioread32(bo->kmap.virtual + i);
130 /* No transparency */
131 if (this_colour>>24 != 0xff &&
132 this_colour>>24 != 0x0) {
133 if (warn_transparent) {
134 dev_info(&dev->pdev->dev, "Video card doesn't support cursors with partial transparency.\n");
135 dev_info(&dev->pdev->dev, "Not enabling hardware cursor.\n");
136 warn_transparent = false; /* Only tell the user once. */
137 }
138 ret = -EINVAL;
139 goto out3;
140 }
141 /* Don't need to store transparent pixels as colours */
142 if (this_colour>>24 == 0x0)
143 continue;
144 found = false;
145 for (palette_iter = &colour_set[0]; palette_iter != next_space; palette_iter++) {
146 if (*palette_iter == this_colour) {
147 found = true;
148 break;
149 }
150 }
151 if (found)
152 continue;
153 /* We only support 4bit paletted cursors */
154 if (colour_count >= 16) {
155 if (warn_palette) {
156 dev_info(&dev->pdev->dev, "Video card only supports cursors with up to 16 colours.\n");
157 dev_info(&dev->pdev->dev, "Not enabling hardware cursor.\n");
158 warn_palette = false; /* Only tell the user once. */
159 }
160 ret = -EINVAL;
161 goto out3;
162 }
163 *next_space = this_colour;
164 next_space++;
165 colour_count++;
166 }
167
168 /* Program colours from cursor icon into palette */
169 for (i = 0; i < colour_count; i++) {
170 if (i <= 2)
171 reg_index = 0x8 + i*0x4;
172 else
173 reg_index = 0x60 + i*0x3;
174 WREG_DAC(reg_index, colour_set[i] & 0xff);
175 WREG_DAC(reg_index+1, colour_set[i]>>8 & 0xff);
176 WREG_DAC(reg_index+2, colour_set[i]>>16 & 0xff);
177 BUG_ON((colour_set[i]>>24 & 0xff) != 0xff);
178 }
179
180 /* Map up-coming buffer to write colour indices */
181 if (!pixels_prev->kmap.virtual) {
182 ret = ttm_bo_kmap(&pixels_prev->bo, 0,
183 pixels_prev->bo.num_pages,
184 &pixels_prev->kmap);
185 if (ret) {
186 dev_err(&dev->pdev->dev, "failed to kmap cursor updates\n");
187 goto out3;
188 }
189 }
190
191 /* now write colour indices into hardware cursor buffer */
192 for (row = 0; row < 64; row++) {
193 memset(&this_row[0], 0, 48);
194 for (col = 0; col < 64; col++) {
195 this_colour = ioread32(bo->kmap.virtual + 4*(col + 64*row));
196 /* write transparent pixels */
197 if (this_colour>>24 == 0x0) {
198 this_row[47 - col/8] |= 0x80>>(col%8);
199 continue;
200 }
201
202 /* write colour index here */
203 for (i = 0; i < colour_count; i++) {
204 if (colour_set[i] == this_colour) {
205 if (col % 2)
206 this_row[col/2] |= i<<4;
207 else
208 this_row[col/2] |= i;
209 break;
210 }
211 }
212 }
213 memcpy_toio(pixels_prev->kmap.virtual + row*48, &this_row[0], 48);
214 }
215
216 /* Program gpu address of cursor buffer */
217 if (pixels_prev == pixels_1)
218 gpu_addr = mdev->cursor.pixels_1_gpu_addr;
219 else
220 gpu_addr = mdev->cursor.pixels_2_gpu_addr;
221 WREG_DAC(MGA1064_CURSOR_BASE_ADR_LOW, (u8)((gpu_addr>>10) & 0xff));
222 WREG_DAC(MGA1064_CURSOR_BASE_ADR_HI, (u8)((gpu_addr>>18) & 0x3f));
223
224 /* Adjust cursor control register to turn on the cursor */
225 WREG_DAC(MGA1064_CURSOR_CTL, 4); /* 16-colour palletized cursor mode */
226
227 /* Now swap internal buffer pointers */
228 if (mdev->cursor.pixels_1 == mdev->cursor.pixels_prev) {
229 mdev->cursor.pixels_prev = mdev->cursor.pixels_2;
230 mdev->cursor.pixels_current = mdev->cursor.pixels_1;
231 } else if (mdev->cursor.pixels_1 == mdev->cursor.pixels_current) {
232 mdev->cursor.pixels_prev = mdev->cursor.pixels_1;
233 mdev->cursor.pixels_current = mdev->cursor.pixels_2;
234 } else {
235 BUG();
236 }
237 ret = 0;
238
239 ttm_bo_kunmap(&pixels_prev->kmap);
240 out3:
241 ttm_bo_kunmap(&bo->kmap);
242 out2:
243 mgag200_bo_unreserve(bo);
244 out1:
245 if (ret)
246 mga_hide_cursor(mdev);
247 mgag200_bo_unreserve(pixels_1);
248 out_unreserve1:
249 mgag200_bo_unreserve(pixels_2);
250 out_unref:
251 drm_gem_object_unreference_unlocked(obj);
252
253 return ret;
254 }
255
mga_crtc_cursor_move(struct drm_crtc * crtc,int x,int y)256 int mga_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
257 {
258 struct mga_device *mdev = (struct mga_device *)crtc->dev->dev_private;
259 /* Our origin is at (64,64) */
260 x += 64;
261 y += 64;
262
263 BUG_ON(x <= 0);
264 BUG_ON(y <= 0);
265 BUG_ON(x & ~0xffff);
266 BUG_ON(y & ~0xffff);
267
268 WREG8(MGA_CURPOSXL, x & 0xff);
269 WREG8(MGA_CURPOSXH, (x>>8) & 0xff);
270
271 WREG8(MGA_CURPOSYL, y & 0xff);
272 WREG8(MGA_CURPOSYH, (y>>8) & 0xff);
273 return 0;
274 }
275