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1/*
2 * Copyright (C) STMicroelectronics SA 2014
3 * Authors: Vincent Abriou <vincent.abriou@st.com>
4 * Fabien Dessenne <fabien.dessenne@st.com>
5 * for STMicroelectronics.
6 * License terms: GNU General Public License (GPL), version 2
7 */
8
9#include <linux/seq_file.h>
10
11#include <drm/drm_atomic.h>
12#include <drm/drm_fb_cma_helper.h>
13#include <drm/drm_gem_cma_helper.h>
14
15#include "sti_compositor.h"
16#include "sti_cursor.h"
17#include "sti_plane.h"
18#include "sti_vtg.h"
19
20/* Registers */
21#define CUR_CTL 0x00
22#define CUR_VPO 0x0C
23#define CUR_PML 0x14
24#define CUR_PMP 0x18
25#define CUR_SIZE 0x1C
26#define CUR_CML 0x20
27#define CUR_AWS 0x28
28#define CUR_AWE 0x2C
29
30#define CUR_CTL_CLUT_UPDATE BIT(1)
31
32#define STI_CURS_MIN_SIZE 1
33#define STI_CURS_MAX_SIZE 128
34
35/*
36 * pixmap dma buffer stucture
37 *
38 * @paddr: physical address
39 * @size: buffer size
40 * @base: virtual address
41 */
42struct dma_pixmap {
43 dma_addr_t paddr;
44 size_t size;
45 void *base;
46};
47
48/**
49 * STI Cursor structure
50 *
51 * @sti_plane: sti_plane structure
52 * @dev: driver device
53 * @regs: cursor registers
54 * @width: cursor width
55 * @height: cursor height
56 * @clut: color look up table
57 * @clut_paddr: color look up table physical address
58 * @pixmap: pixmap dma buffer (clut8-format cursor)
59 */
60struct sti_cursor {
61 struct sti_plane plane;
62 struct device *dev;
63 void __iomem *regs;
64 unsigned int width;
65 unsigned int height;
66 unsigned short *clut;
67 dma_addr_t clut_paddr;
68 struct dma_pixmap pixmap;
69};
70
71static const uint32_t cursor_supported_formats[] = {
72 DRM_FORMAT_ARGB8888,
73};
74
75#define to_sti_cursor(x) container_of(x, struct sti_cursor, plane)
76
77#define DBGFS_DUMP(reg) seq_printf(s, "\n %-25s 0x%08X", #reg, \
78 readl(cursor->regs + reg))
79
80static void cursor_dbg_vpo(struct seq_file *s, u32 val)
81{
82 seq_printf(s, "\txdo:%4d\tydo:%4d", val & 0x0FFF, (val >> 16) & 0x0FFF);
83}
84
85static void cursor_dbg_size(struct seq_file *s, u32 val)
86{
87 seq_printf(s, "\t%d x %d", val & 0x07FF, (val >> 16) & 0x07FF);
88}
89
90static void cursor_dbg_pml(struct seq_file *s,
91 struct sti_cursor *cursor, u32 val)
92{
93 if (cursor->pixmap.paddr == val)
94 seq_printf(s, "\tVirt @: %p", cursor->pixmap.base);
95}
96
97static void cursor_dbg_cml(struct seq_file *s,
98 struct sti_cursor *cursor, u32 val)
99{
100 if (cursor->clut_paddr == val)
101 seq_printf(s, "\tVirt @: %p", cursor->clut);
102}
103
104static int cursor_dbg_show(struct seq_file *s, void *data)
105{
106 struct drm_info_node *node = s->private;
107 struct sti_cursor *cursor = (struct sti_cursor *)node->info_ent->data;
108
109 seq_printf(s, "%s: (vaddr = 0x%p)",
110 sti_plane_to_str(&cursor->plane), cursor->regs);
111
112 DBGFS_DUMP(CUR_CTL);
113 DBGFS_DUMP(CUR_VPO);
114 cursor_dbg_vpo(s, readl(cursor->regs + CUR_VPO));
115 DBGFS_DUMP(CUR_PML);
116 cursor_dbg_pml(s, cursor, readl(cursor->regs + CUR_PML));
117 DBGFS_DUMP(CUR_PMP);
118 DBGFS_DUMP(CUR_SIZE);
119 cursor_dbg_size(s, readl(cursor->regs + CUR_SIZE));
120 DBGFS_DUMP(CUR_CML);
121 cursor_dbg_cml(s, cursor, readl(cursor->regs + CUR_CML));
122 DBGFS_DUMP(CUR_AWS);
123 DBGFS_DUMP(CUR_AWE);
124 seq_puts(s, "\n");
125
126 return 0;
127}
128
129static struct drm_info_list cursor_debugfs_files[] = {
130 { "cursor", cursor_dbg_show, 0, NULL },
131};
132
133static int cursor_debugfs_init(struct sti_cursor *cursor,
134 struct drm_minor *minor)
135{
136 unsigned int i;
137
138 for (i = 0; i < ARRAY_SIZE(cursor_debugfs_files); i++)
139 cursor_debugfs_files[i].data = cursor;
140
141 return drm_debugfs_create_files(cursor_debugfs_files,
142 ARRAY_SIZE(cursor_debugfs_files),
143 minor->debugfs_root, minor);
144}
145
146static void sti_cursor_argb8888_to_clut8(struct sti_cursor *cursor, u32 *src)
147{
148 u8 *dst = cursor->pixmap.base;
149 unsigned int i, j;
150 u32 a, r, g, b;
151
152 for (i = 0; i < cursor->height; i++) {
153 for (j = 0; j < cursor->width; j++) {
154 /* Pick the 2 higher bits of each component */
155 a = (*src >> 30) & 3;
156 r = (*src >> 22) & 3;
157 g = (*src >> 14) & 3;
158 b = (*src >> 6) & 3;
159 *dst = a << 6 | r << 4 | g << 2 | b;
160 src++;
161 dst++;
162 }
163 }
164}
165
166static void sti_cursor_init(struct sti_cursor *cursor)
167{
168 unsigned short *base = cursor->clut;
169 unsigned int a, r, g, b;
170
171 /* Assign CLUT values, ARGB444 format */
172 for (a = 0; a < 4; a++)
173 for (r = 0; r < 4; r++)
174 for (g = 0; g < 4; g++)
175 for (b = 0; b < 4; b++)
176 *base++ = (a * 5) << 12 |
177 (r * 5) << 8 |
178 (g * 5) << 4 |
179 (b * 5);
180}
181
182static int sti_cursor_atomic_check(struct drm_plane *drm_plane,
183 struct drm_plane_state *state)
184{
185 struct sti_plane *plane = to_sti_plane(drm_plane);
186 struct sti_cursor *cursor = to_sti_cursor(plane);
187 struct drm_crtc *crtc = state->crtc;
188 struct drm_framebuffer *fb = state->fb;
189 struct drm_crtc_state *crtc_state;
190 struct drm_display_mode *mode;
191 int dst_x, dst_y, dst_w, dst_h;
192 int src_w, src_h;
193
194 /* no need for further checks if the plane is being disabled */
195 if (!crtc || !fb)
196 return 0;
197
198 crtc_state = drm_atomic_get_crtc_state(state->state, crtc);
199 mode = &crtc_state->mode;
200 dst_x = state->crtc_x;
201 dst_y = state->crtc_y;
202 dst_w = clamp_val(state->crtc_w, 0, mode->crtc_hdisplay - dst_x);
203 dst_h = clamp_val(state->crtc_h, 0, mode->crtc_vdisplay - dst_y);
204 /* src_x are in 16.16 format */
205 src_w = state->src_w >> 16;
206 src_h = state->src_h >> 16;
207
208 if (src_w < STI_CURS_MIN_SIZE ||
209 src_h < STI_CURS_MIN_SIZE ||
210 src_w > STI_CURS_MAX_SIZE ||
211 src_h > STI_CURS_MAX_SIZE) {
212 DRM_ERROR("Invalid cursor size (%dx%d)\n",
213 src_w, src_h);
214 return -EINVAL;
215 }
216
217 /* If the cursor size has changed, re-allocated the pixmap */
218 if (!cursor->pixmap.base ||
219 (cursor->width != src_w) ||
220 (cursor->height != src_h)) {
221 cursor->width = src_w;
222 cursor->height = src_h;
223
224 if (cursor->pixmap.base)
225 dma_free_wc(cursor->dev, cursor->pixmap.size,
226 cursor->pixmap.base, cursor->pixmap.paddr);
227
228 cursor->pixmap.size = cursor->width * cursor->height;
229
230 cursor->pixmap.base = dma_alloc_wc(cursor->dev,
231 cursor->pixmap.size,
232 &cursor->pixmap.paddr,
233 GFP_KERNEL | GFP_DMA);
234 if (!cursor->pixmap.base) {
235 DRM_ERROR("Failed to allocate memory for pixmap\n");
236 return -EINVAL;
237 }
238 }
239
240 if (!drm_fb_cma_get_gem_obj(fb, 0)) {
241 DRM_ERROR("Can't get CMA GEM object for fb\n");
242 return -EINVAL;
243 }
244
245 DRM_DEBUG_KMS("CRTC:%d (%s) drm plane:%d (%s)\n",
246 crtc->base.id, sti_mixer_to_str(to_sti_mixer(crtc)),
247 drm_plane->base.id, sti_plane_to_str(plane));
248 DRM_DEBUG_KMS("(%dx%d)@(%d,%d)\n", dst_w, dst_h, dst_x, dst_y);
249
250 return 0;
251}
252
253static void sti_cursor_atomic_update(struct drm_plane *drm_plane,
254 struct drm_plane_state *oldstate)
255{
256 struct drm_plane_state *state = drm_plane->state;
257 struct sti_plane *plane = to_sti_plane(drm_plane);
258 struct sti_cursor *cursor = to_sti_cursor(plane);
259 struct drm_crtc *crtc = state->crtc;
260 struct drm_framebuffer *fb = state->fb;
261 struct drm_display_mode *mode;
262 int dst_x, dst_y;
263 struct drm_gem_cma_object *cma_obj;
264 u32 y, x;
265 u32 val;
266
267 if (!crtc || !fb)
268 return;
269
270 mode = &crtc->mode;
271 dst_x = state->crtc_x;
272 dst_y = state->crtc_y;
273
274 cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
275
276 /* Convert ARGB8888 to CLUT8 */
277 sti_cursor_argb8888_to_clut8(cursor, (u32 *)cma_obj->vaddr);
278
279 /* AWS and AWE depend on the mode */
280 y = sti_vtg_get_line_number(*mode, 0);
281 x = sti_vtg_get_pixel_number(*mode, 0);
282 val = y << 16 | x;
283 writel(val, cursor->regs + CUR_AWS);
284 y = sti_vtg_get_line_number(*mode, mode->vdisplay - 1);
285 x = sti_vtg_get_pixel_number(*mode, mode->hdisplay - 1);
286 val = y << 16 | x;
287 writel(val, cursor->regs + CUR_AWE);
288
289 /* Set memory location, size, and position */
290 writel(cursor->pixmap.paddr, cursor->regs + CUR_PML);
291 writel(cursor->width, cursor->regs + CUR_PMP);
292 writel(cursor->height << 16 | cursor->width, cursor->regs + CUR_SIZE);
293
294 y = sti_vtg_get_line_number(*mode, dst_y);
295 x = sti_vtg_get_pixel_number(*mode, dst_x);
296 writel((y << 16) | x, cursor->regs + CUR_VPO);
297
298 /* Set and fetch CLUT */
299 writel(cursor->clut_paddr, cursor->regs + CUR_CML);
300 writel(CUR_CTL_CLUT_UPDATE, cursor->regs + CUR_CTL);
301
302 sti_plane_update_fps(plane, true, false);
303
304 plane->status = STI_PLANE_UPDATED;
305}
306
307static void sti_cursor_atomic_disable(struct drm_plane *drm_plane,
308 struct drm_plane_state *oldstate)
309{
310 struct sti_plane *plane = to_sti_plane(drm_plane);
311
312 if (!oldstate->crtc) {
313 DRM_DEBUG_DRIVER("drm plane:%d not enabled\n",
314 drm_plane->base.id);
315 return;
316 }
317
318 DRM_DEBUG_DRIVER("CRTC:%d (%s) drm plane:%d (%s)\n",
319 oldstate->crtc->base.id,
320 sti_mixer_to_str(to_sti_mixer(oldstate->crtc)),
321 drm_plane->base.id, sti_plane_to_str(plane));
322
323 plane->status = STI_PLANE_DISABLING;
324}
325
326static const struct drm_plane_helper_funcs sti_cursor_helpers_funcs = {
327 .atomic_check = sti_cursor_atomic_check,
328 .atomic_update = sti_cursor_atomic_update,
329 .atomic_disable = sti_cursor_atomic_disable,
330};
331
332static void sti_cursor_destroy(struct drm_plane *drm_plane)
333{
334 DRM_DEBUG_DRIVER("\n");
335
336 drm_plane_helper_disable(drm_plane);
337 drm_plane_cleanup(drm_plane);
338}
339
340static int sti_cursor_late_register(struct drm_plane *drm_plane)
341{
342 struct sti_plane *plane = to_sti_plane(drm_plane);
343 struct sti_cursor *cursor = to_sti_cursor(plane);
344
345 return cursor_debugfs_init(cursor, drm_plane->dev->primary);
346}
347
348static const struct drm_plane_funcs sti_cursor_plane_helpers_funcs = {
349 .update_plane = drm_atomic_helper_update_plane,
350 .disable_plane = drm_atomic_helper_disable_plane,
351 .destroy = sti_cursor_destroy,
352 .set_property = drm_atomic_helper_plane_set_property,
353 .reset = sti_plane_reset,
354 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
355 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
356 .late_register = sti_cursor_late_register,
357};
358
359struct drm_plane *sti_cursor_create(struct drm_device *drm_dev,
360 struct device *dev, int desc,
361 void __iomem *baseaddr,
362 unsigned int possible_crtcs)
363{
364 struct sti_cursor *cursor;
365 size_t size;
366 int res;
367
368 cursor = devm_kzalloc(dev, sizeof(*cursor), GFP_KERNEL);
369 if (!cursor) {
370 DRM_ERROR("Failed to allocate memory for cursor\n");
371 return NULL;
372 }
373
374 /* Allocate clut buffer */
375 size = 0x100 * sizeof(unsigned short);
376 cursor->clut = dma_alloc_wc(dev, size, &cursor->clut_paddr,
377 GFP_KERNEL | GFP_DMA);
378
379 if (!cursor->clut) {
380 DRM_ERROR("Failed to allocate memory for cursor clut\n");
381 goto err_clut;
382 }
383
384 cursor->dev = dev;
385 cursor->regs = baseaddr;
386 cursor->plane.desc = desc;
387 cursor->plane.status = STI_PLANE_DISABLED;
388
389 sti_cursor_init(cursor);
390
391 res = drm_universal_plane_init(drm_dev, &cursor->plane.drm_plane,
392 possible_crtcs,
393 &sti_cursor_plane_helpers_funcs,
394 cursor_supported_formats,
395 ARRAY_SIZE(cursor_supported_formats),
396 DRM_PLANE_TYPE_CURSOR, NULL);
397 if (res) {
398 DRM_ERROR("Failed to initialize universal plane\n");
399 goto err_plane;
400 }
401
402 drm_plane_helper_add(&cursor->plane.drm_plane,
403 &sti_cursor_helpers_funcs);
404
405 sti_plane_init_property(&cursor->plane, DRM_PLANE_TYPE_CURSOR);
406
407 return &cursor->plane.drm_plane;
408
409err_plane:
410 dma_free_wc(dev, size, cursor->clut, cursor->clut_paddr);
411err_clut:
412 devm_kfree(dev, cursor);
413 return NULL;
414}