1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright 2013 Matrox Graphics
5 * Author: Christopher Harvey <charvey@matrox.com>
8 #include <drm/drm_pci.h>
10 #include "mgag200_drv.h"
12 static bool warn_transparent = true;
13 static bool warn_palette = true;
15 static int mgag200_cursor_update(struct mga_device *mdev, void *dst, void *src,
16 unsigned int width, unsigned int height)
18 struct drm_device *dev = mdev->dev;
19 unsigned int i, row, col;
20 uint32_t colour_set[16];
21 uint32_t *next_space = &colour_set[0];
22 uint32_t *palette_iter;
29 memset(&colour_set[0], 0, sizeof(uint32_t)*16);
30 /* width*height*4 = 16384 */
31 for (i = 0; i < 16384; i += 4) {
32 this_colour = ioread32(src + i);
34 if (this_colour>>24 != 0xff &&
35 this_colour>>24 != 0x0) {
36 if (warn_transparent) {
37 dev_info(&dev->pdev->dev, "Video card doesn't support cursors with partial transparency.\n");
38 dev_info(&dev->pdev->dev, "Not enabling hardware cursor.\n");
39 warn_transparent = false; /* Only tell the user once. */
43 /* Don't need to store transparent pixels as colours */
44 if (this_colour>>24 == 0x0)
47 for (palette_iter = &colour_set[0]; palette_iter != next_space; palette_iter++) {
48 if (*palette_iter == this_colour) {
55 /* We only support 4bit paletted cursors */
56 if (colour_count >= 16) {
58 dev_info(&dev->pdev->dev, "Video card only supports cursors with up to 16 colours.\n");
59 dev_info(&dev->pdev->dev, "Not enabling hardware cursor.\n");
60 warn_palette = false; /* Only tell the user once. */
64 *next_space = this_colour;
69 /* Program colours from cursor icon into palette */
70 for (i = 0; i < colour_count; i++) {
72 reg_index = 0x8 + i*0x4;
74 reg_index = 0x60 + i*0x3;
75 WREG_DAC(reg_index, colour_set[i] & 0xff);
76 WREG_DAC(reg_index+1, colour_set[i]>>8 & 0xff);
77 WREG_DAC(reg_index+2, colour_set[i]>>16 & 0xff);
78 BUG_ON((colour_set[i]>>24 & 0xff) != 0xff);
81 /* now write colour indices into hardware cursor buffer */
82 for (row = 0; row < 64; row++) {
83 memset(&this_row[0], 0, 48);
84 for (col = 0; col < 64; col++) {
85 this_colour = ioread32(src + 4*(col + 64*row));
86 /* write transparent pixels */
87 if (this_colour>>24 == 0x0) {
88 this_row[47 - col/8] |= 0x80>>(col%8);
92 /* write colour index here */
93 for (i = 0; i < colour_count; i++) {
94 if (colour_set[i] == this_colour) {
96 this_row[col/2] |= i<<4;
103 memcpy_toio(dst + row*48, &this_row[0], 48);
109 static void mgag200_cursor_set_base(struct mga_device *mdev, u64 address)
111 u8 addrl = (address >> 10) & 0xff;
112 u8 addrh = (address >> 18) & 0x3f;
114 /* Program gpu address of cursor buffer */
115 WREG_DAC(MGA1064_CURSOR_BASE_ADR_LOW, addrl);
116 WREG_DAC(MGA1064_CURSOR_BASE_ADR_HI, addrh);
119 static int mgag200_show_cursor(struct mga_device *mdev, void *src,
120 unsigned int width, unsigned int height)
122 struct drm_device *dev = mdev->dev;
123 struct drm_gem_vram_object *gbo;
128 gbo = mdev->cursor.gbo[mdev->cursor.next_index];
130 WREG8(MGA_CURPOSXL, 0);
131 WREG8(MGA_CURPOSXH, 0);
132 return -ENOTSUPP; /* Didn't allocate space for cursors */
134 dst = drm_gem_vram_vmap(gbo);
137 dev_err(&dev->pdev->dev,
138 "failed to map cursor updates: %d\n", ret);
141 off = drm_gem_vram_offset(gbo);
144 dev_err(&dev->pdev->dev,
145 "failed to get cursor scanout address: %d\n", ret);
146 goto err_drm_gem_vram_vunmap;
149 ret = mgag200_cursor_update(mdev, dst, src, width, height);
151 goto err_drm_gem_vram_vunmap;
152 mgag200_cursor_set_base(mdev, off);
154 /* Adjust cursor control register to turn on the cursor */
155 WREG_DAC(MGA1064_CURSOR_CTL, 4); /* 16-colour palletized cursor mode */
157 drm_gem_vram_vunmap(gbo, dst);
159 ++mdev->cursor.next_index;
160 mdev->cursor.next_index %= ARRAY_SIZE(mdev->cursor.gbo);
164 err_drm_gem_vram_vunmap:
165 drm_gem_vram_vunmap(gbo, dst);
170 * Hide the cursor off screen. We can't disable the cursor hardware because
171 * it takes too long to re-activate and causes momentary corruption.
173 static void mgag200_hide_cursor(struct mga_device *mdev)
175 WREG8(MGA_CURPOSXL, 0);
176 WREG8(MGA_CURPOSXH, 0);
179 static void mgag200_move_cursor(struct mga_device *mdev, int x, int y)
185 if (WARN_ON(x & ~0xffff))
187 if (WARN_ON(y & ~0xffff))
190 WREG8(MGA_CURPOSXL, x & 0xff);
191 WREG8(MGA_CURPOSXH, (x>>8) & 0xff);
193 WREG8(MGA_CURPOSYL, y & 0xff);
194 WREG8(MGA_CURPOSYH, (y>>8) & 0xff);
197 int mgag200_cursor_init(struct mga_device *mdev)
199 struct drm_device *dev = mdev->dev;
200 size_t ncursors = ARRAY_SIZE(mdev->cursor.gbo);
204 struct drm_gem_vram_object *gbo;
206 size = roundup(64 * 48, PAGE_SIZE);
207 if (size * ncursors > mdev->vram_fb_available)
210 for (i = 0; i < ncursors; ++i) {
211 gbo = drm_gem_vram_create(dev, &dev->vram_mm->bdev,
215 goto err_drm_gem_vram_put;
217 ret = drm_gem_vram_pin(gbo, DRM_GEM_VRAM_PL_FLAG_VRAM |
218 DRM_GEM_VRAM_PL_FLAG_TOPDOWN);
220 drm_gem_vram_put(gbo);
221 goto err_drm_gem_vram_put;
224 mdev->cursor.gbo[i] = gbo;
228 * At the high end of video memory, we reserve space for
229 * buffer objects. The cursor plane uses this memory to store
230 * a double-buffered image of the current cursor. Hence, it's
231 * not available for framebuffers.
233 mdev->vram_fb_available -= ncursors * size;
237 err_drm_gem_vram_put:
240 gbo = mdev->cursor.gbo[i];
241 drm_gem_vram_unpin(gbo);
242 drm_gem_vram_put(gbo);
243 mdev->cursor.gbo[i] = NULL;
248 void mgag200_cursor_fini(struct mga_device *mdev)
251 struct drm_gem_vram_object *gbo;
253 for (i = 0; i < ARRAY_SIZE(mdev->cursor.gbo); ++i) {
254 gbo = mdev->cursor.gbo[i];
255 drm_gem_vram_unpin(gbo);
256 drm_gem_vram_put(gbo);
260 int mgag200_crtc_cursor_set(struct drm_crtc *crtc, struct drm_file *file_priv,
261 uint32_t handle, uint32_t width, uint32_t height)
263 struct drm_device *dev = crtc->dev;
264 struct mga_device *mdev = (struct mga_device *)dev->dev_private;
265 struct drm_gem_object *obj;
266 struct drm_gem_vram_object *gbo = NULL;
270 if (!handle || !file_priv) {
271 mgag200_hide_cursor(mdev);
275 if (width != 64 || height != 64) {
276 WREG8(MGA_CURPOSXL, 0);
277 WREG8(MGA_CURPOSXH, 0);
281 obj = drm_gem_object_lookup(file_priv, handle);
284 gbo = drm_gem_vram_of_gem(obj);
285 src = drm_gem_vram_vmap(gbo);
288 dev_err(&dev->pdev->dev,
289 "failed to map user buffer updates\n");
290 goto err_drm_gem_object_put_unlocked;
293 ret = mgag200_show_cursor(mdev, src, width, height);
295 goto err_drm_gem_vram_vunmap;
297 /* Now update internal buffer pointers */
298 drm_gem_vram_vunmap(gbo, src);
299 drm_gem_object_put_unlocked(obj);
302 err_drm_gem_vram_vunmap:
303 drm_gem_vram_vunmap(gbo, src);
304 err_drm_gem_object_put_unlocked:
305 drm_gem_object_put_unlocked(obj);
309 int mgag200_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
311 struct mga_device *mdev = (struct mga_device *)crtc->dev->dev_private;
313 /* Our origin is at (64,64) */
317 mgag200_move_cursor(mdev, x, y);