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