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
9 #include <drm/drm_atomic.h>
10 #include <drm/drm_fb_cma_helper.h>
11 #include <drm/drm_gem_cma_helper.h>
13 #include "sti_compositor.h"
14 #include "sti_cursor.h"
15 #include "sti_plane.h"
28 #define CUR_CTL_CLUT_UPDATE BIT(1)
30 #define STI_CURS_MIN_SIZE 1
31 #define STI_CURS_MAX_SIZE 128
34 * pixmap dma buffer stucture
36 * @paddr: physical address
38 * @base: virtual address
47 * STI Cursor structure
49 * @sti_plane: sti_plane structure
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)
59 struct sti_plane plane;
65 dma_addr_t clut_paddr;
66 struct dma_pixmap pixmap;
69 static const uint32_t cursor_supported_formats[] = {
73 #define to_sti_cursor(x) container_of(x, struct sti_cursor, plane)
75 #define DBGFS_DUMP(reg) seq_printf(s, "\n %-25s 0x%08X", #reg, \
76 readl(cursor->regs + reg))
78 static void cursor_dbg_vpo(struct seq_file *s, u32 val)
80 seq_printf(s, "\txdo:%4d\tydo:%4d", val & 0x0FFF, (val >> 16) & 0x0FFF);
83 static void cursor_dbg_size(struct seq_file *s, u32 val)
85 seq_printf(s, "\t%d x %d", val & 0x07FF, (val >> 16) & 0x07FF);
88 static void cursor_dbg_pml(struct seq_file *s,
89 struct sti_cursor *cursor, u32 val)
91 if (cursor->pixmap.paddr == val)
92 seq_printf(s, "\tVirt @: %p", cursor->pixmap.base);
95 static void cursor_dbg_cml(struct seq_file *s,
96 struct sti_cursor *cursor, u32 val)
98 if (cursor->clut_paddr == val)
99 seq_printf(s, "\tVirt @: %p", cursor->clut);
102 static int cursor_dbg_show(struct seq_file *s, void *data)
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;
109 ret = mutex_lock_interruptible(&dev->struct_mutex);
113 seq_printf(s, "%s: (vaddr = 0x%p)",
114 sti_plane_to_str(&cursor->plane), cursor->regs);
118 cursor_dbg_vpo(s, readl(cursor->regs + CUR_VPO));
120 cursor_dbg_pml(s, cursor, readl(cursor->regs + CUR_PML));
122 DBGFS_DUMP(CUR_SIZE);
123 cursor_dbg_size(s, readl(cursor->regs + CUR_SIZE));
125 cursor_dbg_cml(s, cursor, readl(cursor->regs + CUR_CML));
130 mutex_unlock(&dev->struct_mutex);
134 static struct drm_info_list cursor_debugfs_files[] = {
135 { "cursor", cursor_dbg_show, 0, NULL },
138 static int cursor_debugfs_init(struct sti_cursor *cursor,
139 struct drm_minor *minor)
143 for (i = 0; i < ARRAY_SIZE(cursor_debugfs_files); i++)
144 cursor_debugfs_files[i].data = cursor;
146 return drm_debugfs_create_files(cursor_debugfs_files,
147 ARRAY_SIZE(cursor_debugfs_files),
148 minor->debugfs_root, minor);
151 static void sti_cursor_argb8888_to_clut8(struct sti_cursor *cursor, u32 *src)
153 u8 *dst = cursor->pixmap.base;
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;
164 *dst = a << 6 | r << 4 | g << 2 | b;
171 static void sti_cursor_init(struct sti_cursor *cursor)
173 unsigned short *base = cursor->clut;
174 unsigned int a, r, g, b;
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 |
187 static int sti_cursor_atomic_check(struct drm_plane *drm_plane,
188 struct drm_plane_state *state)
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;
199 /* no need for further checks if the plane is being disabled */
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;
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",
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;
229 if (cursor->pixmap.base)
230 dma_free_writecombine(cursor->dev,
233 cursor->pixmap.paddr);
235 cursor->pixmap.size = cursor->width * cursor->height;
237 cursor->pixmap.base = dma_alloc_writecombine(cursor->dev,
239 &cursor->pixmap.paddr,
240 GFP_KERNEL | GFP_DMA);
241 if (!cursor->pixmap.base) {
242 DRM_ERROR("Failed to allocate memory for pixmap\n");
247 if (!drm_fb_cma_get_gem_obj(fb, 0)) {
248 DRM_ERROR("Can't get CMA GEM object for fb\n");
252 DRM_DEBUG_KMS("CRTC:%d (%s) drm plane:%d (%s)\n",
253 crtc->base.id, sti_mixer_to_str(to_sti_mixer(crtc)),
254 drm_plane->base.id, sti_plane_to_str(plane));
255 DRM_DEBUG_KMS("(%dx%d)@(%d,%d)\n", dst_w, dst_h, dst_x, dst_y);
260 static void sti_cursor_atomic_update(struct drm_plane *drm_plane,
261 struct drm_plane_state *oldstate)
263 struct drm_plane_state *state = drm_plane->state;
264 struct sti_plane *plane = to_sti_plane(drm_plane);
265 struct sti_cursor *cursor = to_sti_cursor(plane);
266 struct drm_crtc *crtc = state->crtc;
267 struct drm_framebuffer *fb = state->fb;
268 struct drm_display_mode *mode;
270 struct drm_gem_cma_object *cma_obj;
278 dst_x = state->crtc_x;
279 dst_y = state->crtc_y;
281 cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
283 /* Convert ARGB8888 to CLUT8 */
284 sti_cursor_argb8888_to_clut8(cursor, (u32 *)cma_obj->vaddr);
286 /* AWS and AWE depend on the mode */
287 y = sti_vtg_get_line_number(*mode, 0);
288 x = sti_vtg_get_pixel_number(*mode, 0);
290 writel(val, cursor->regs + CUR_AWS);
291 y = sti_vtg_get_line_number(*mode, mode->vdisplay - 1);
292 x = sti_vtg_get_pixel_number(*mode, mode->hdisplay - 1);
294 writel(val, cursor->regs + CUR_AWE);
296 /* Set memory location, size, and position */
297 writel(cursor->pixmap.paddr, cursor->regs + CUR_PML);
298 writel(cursor->width, cursor->regs + CUR_PMP);
299 writel(cursor->height << 16 | cursor->width, cursor->regs + CUR_SIZE);
301 y = sti_vtg_get_line_number(*mode, dst_y);
302 x = sti_vtg_get_pixel_number(*mode, dst_x);
303 writel((y << 16) | x, cursor->regs + CUR_VPO);
305 /* Set and fetch CLUT */
306 writel(cursor->clut_paddr, cursor->regs + CUR_CML);
307 writel(CUR_CTL_CLUT_UPDATE, cursor->regs + CUR_CTL);
309 sti_plane_update_fps(plane, true, false);
311 plane->status = STI_PLANE_UPDATED;
314 static void sti_cursor_atomic_disable(struct drm_plane *drm_plane,
315 struct drm_plane_state *oldstate)
317 struct sti_plane *plane = to_sti_plane(drm_plane);
319 if (!drm_plane->crtc) {
320 DRM_DEBUG_DRIVER("drm plane:%d not enabled\n",
325 DRM_DEBUG_DRIVER("CRTC:%d (%s) drm plane:%d (%s)\n",
326 drm_plane->crtc->base.id,
327 sti_mixer_to_str(to_sti_mixer(drm_plane->crtc)),
328 drm_plane->base.id, sti_plane_to_str(plane));
330 plane->status = STI_PLANE_DISABLING;
333 static const struct drm_plane_helper_funcs sti_cursor_helpers_funcs = {
334 .atomic_check = sti_cursor_atomic_check,
335 .atomic_update = sti_cursor_atomic_update,
336 .atomic_disable = sti_cursor_atomic_disable,
339 struct drm_plane *sti_cursor_create(struct drm_device *drm_dev,
340 struct device *dev, int desc,
341 void __iomem *baseaddr,
342 unsigned int possible_crtcs)
344 struct sti_cursor *cursor;
348 cursor = devm_kzalloc(dev, sizeof(*cursor), GFP_KERNEL);
350 DRM_ERROR("Failed to allocate memory for cursor\n");
354 /* Allocate clut buffer */
355 size = 0x100 * sizeof(unsigned short);
356 cursor->clut = dma_alloc_writecombine(dev, size, &cursor->clut_paddr,
357 GFP_KERNEL | GFP_DMA);
360 DRM_ERROR("Failed to allocate memory for cursor clut\n");
365 cursor->regs = baseaddr;
366 cursor->plane.desc = desc;
367 cursor->plane.status = STI_PLANE_DISABLED;
369 sti_cursor_init(cursor);
371 res = drm_universal_plane_init(drm_dev, &cursor->plane.drm_plane,
373 &sti_plane_helpers_funcs,
374 cursor_supported_formats,
375 ARRAY_SIZE(cursor_supported_formats),
376 DRM_PLANE_TYPE_CURSOR, NULL);
378 DRM_ERROR("Failed to initialize universal plane\n");
382 drm_plane_helper_add(&cursor->plane.drm_plane,
383 &sti_cursor_helpers_funcs);
385 sti_plane_init_property(&cursor->plane, DRM_PLANE_TYPE_CURSOR);
387 if (cursor_debugfs_init(cursor, drm_dev->primary))
388 DRM_ERROR("CURSOR debugfs setup failed\n");
390 return &cursor->plane.drm_plane;
393 dma_free_writecombine(dev, size, cursor->clut, cursor->clut_paddr);
395 devm_kfree(dev, cursor);