Linux Audio

Check our new training course

Loading...
Note: File does not exist in v3.1.
  1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Copyright (C) STMicroelectronics SA 2014
  4 * Authors: Vincent Abriou <vincent.abriou@st.com>
  5 *          Fabien Dessenne <fabien.dessenne@st.com>
  6 *          for STMicroelectronics.
  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 structure
 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_putc(s, '\n');
125	return 0;
126}
127
128static struct drm_info_list cursor_debugfs_files[] = {
129	{ "cursor", cursor_dbg_show, 0, NULL },
130};
131
132static int cursor_debugfs_init(struct sti_cursor *cursor,
133			       struct drm_minor *minor)
134{
135	unsigned int i;
136
137	for (i = 0; i < ARRAY_SIZE(cursor_debugfs_files); i++)
138		cursor_debugfs_files[i].data = cursor;
139
140	return drm_debugfs_create_files(cursor_debugfs_files,
141					ARRAY_SIZE(cursor_debugfs_files),
142					minor->debugfs_root, minor);
143}
144
145static void sti_cursor_argb8888_to_clut8(struct sti_cursor *cursor, u32 *src)
146{
147	u8  *dst = cursor->pixmap.base;
148	unsigned int i, j;
149	u32 a, r, g, b;
150
151	for (i = 0; i < cursor->height; i++) {
152		for (j = 0; j < cursor->width; j++) {
153			/* Pick the 2 higher bits of each component */
154			a = (*src >> 30) & 3;
155			r = (*src >> 22) & 3;
156			g = (*src >> 14) & 3;
157			b = (*src >> 6) & 3;
158			*dst = a << 6 | r << 4 | g << 2 | b;
159			src++;
160			dst++;
161		}
162	}
163}
164
165static void sti_cursor_init(struct sti_cursor *cursor)
166{
167	unsigned short *base = cursor->clut;
168	unsigned int a, r, g, b;
169
170	/* Assign CLUT values, ARGB444 format */
171	for (a = 0; a < 4; a++)
172		for (r = 0; r < 4; r++)
173			for (g = 0; g < 4; g++)
174				for (b = 0; b < 4; b++)
175					*base++ = (a * 5) << 12 |
176						  (r * 5) << 8 |
177						  (g * 5) << 4 |
178						  (b * 5);
179}
180
181static int sti_cursor_atomic_check(struct drm_plane *drm_plane,
182				   struct drm_plane_state *state)
183{
184	struct sti_plane *plane = to_sti_plane(drm_plane);
185	struct sti_cursor *cursor = to_sti_cursor(plane);
186	struct drm_crtc *crtc = state->crtc;
187	struct drm_framebuffer *fb = state->fb;
188	struct drm_crtc_state *crtc_state;
189	struct drm_display_mode *mode;
190	int dst_x, dst_y, dst_w, dst_h;
191	int src_w, src_h;
192
193	/* no need for further checks if the plane is being disabled */
194	if (!crtc || !fb)
195		return 0;
196
197	crtc_state = drm_atomic_get_crtc_state(state->state, crtc);
198	mode = &crtc_state->mode;
199	dst_x = state->crtc_x;
200	dst_y = state->crtc_y;
201	dst_w = clamp_val(state->crtc_w, 0, mode->crtc_hdisplay - dst_x);
202	dst_h = clamp_val(state->crtc_h, 0, mode->crtc_vdisplay - dst_y);
203	/* src_x are in 16.16 format */
204	src_w = state->src_w >> 16;
205	src_h = state->src_h >> 16;
206
207	if (src_w < STI_CURS_MIN_SIZE ||
208	    src_h < STI_CURS_MIN_SIZE ||
209	    src_w > STI_CURS_MAX_SIZE ||
210	    src_h > STI_CURS_MAX_SIZE) {
211		DRM_ERROR("Invalid cursor size (%dx%d)\n",
212				src_w, src_h);
213		return -EINVAL;
214	}
215
216	/* If the cursor size has changed, re-allocated the pixmap */
217	if (!cursor->pixmap.base ||
218	    (cursor->width != src_w) ||
219	    (cursor->height != src_h)) {
220		cursor->width = src_w;
221		cursor->height = src_h;
222
223		if (cursor->pixmap.base)
224			dma_free_wc(cursor->dev, cursor->pixmap.size,
225				    cursor->pixmap.base, cursor->pixmap.paddr);
226
227		cursor->pixmap.size = cursor->width * cursor->height;
228
229		cursor->pixmap.base = dma_alloc_wc(cursor->dev,
230						   cursor->pixmap.size,
231						   &cursor->pixmap.paddr,
232						   GFP_KERNEL | GFP_DMA);
233		if (!cursor->pixmap.base) {
234			DRM_ERROR("Failed to allocate memory for pixmap\n");
235			return -EINVAL;
236		}
237	}
238
239	if (!drm_fb_cma_get_gem_obj(fb, 0)) {
240		DRM_ERROR("Can't get CMA GEM object for fb\n");
241		return -EINVAL;
242	}
243
244	DRM_DEBUG_KMS("CRTC:%d (%s) drm plane:%d (%s)\n",
245		      crtc->base.id, sti_mixer_to_str(to_sti_mixer(crtc)),
246		      drm_plane->base.id, sti_plane_to_str(plane));
247	DRM_DEBUG_KMS("(%dx%d)@(%d,%d)\n", dst_w, dst_h, dst_x, dst_y);
248
249	return 0;
250}
251
252static void sti_cursor_atomic_update(struct drm_plane *drm_plane,
253				     struct drm_plane_state *oldstate)
254{
255	struct drm_plane_state *state = drm_plane->state;
256	struct sti_plane *plane = to_sti_plane(drm_plane);
257	struct sti_cursor *cursor = to_sti_cursor(plane);
258	struct drm_crtc *crtc = state->crtc;
259	struct drm_framebuffer *fb = state->fb;
260	struct drm_display_mode *mode;
261	int dst_x, dst_y;
262	struct drm_gem_cma_object *cma_obj;
263	u32 y, x;
264	u32 val;
265
266	if (!crtc || !fb)
267		return;
268
269	mode = &crtc->mode;
270	dst_x = state->crtc_x;
271	dst_y = state->crtc_y;
272
273	cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
274
275	/* Convert ARGB8888 to CLUT8 */
276	sti_cursor_argb8888_to_clut8(cursor, (u32 *)cma_obj->vaddr);
277
278	/* AWS and AWE depend on the mode */
279	y = sti_vtg_get_line_number(*mode, 0);
280	x = sti_vtg_get_pixel_number(*mode, 0);
281	val = y << 16 | x;
282	writel(val, cursor->regs + CUR_AWS);
283	y = sti_vtg_get_line_number(*mode, mode->vdisplay - 1);
284	x = sti_vtg_get_pixel_number(*mode, mode->hdisplay - 1);
285	val = y << 16 | x;
286	writel(val, cursor->regs + CUR_AWE);
287
288	/* Set memory location, size, and position */
289	writel(cursor->pixmap.paddr, cursor->regs + CUR_PML);
290	writel(cursor->width, cursor->regs + CUR_PMP);
291	writel(cursor->height << 16 | cursor->width, cursor->regs + CUR_SIZE);
292
293	y = sti_vtg_get_line_number(*mode, dst_y);
294	x = sti_vtg_get_pixel_number(*mode, dst_x);
295	writel((y << 16) | x, cursor->regs + CUR_VPO);
296
297	/* Set and fetch CLUT */
298	writel(cursor->clut_paddr, cursor->regs + CUR_CML);
299	writel(CUR_CTL_CLUT_UPDATE, cursor->regs + CUR_CTL);
300
301	sti_plane_update_fps(plane, true, false);
302
303	plane->status = STI_PLANE_UPDATED;
304}
305
306static void sti_cursor_atomic_disable(struct drm_plane *drm_plane,
307				      struct drm_plane_state *oldstate)
308{
309	struct sti_plane *plane = to_sti_plane(drm_plane);
310
311	if (!oldstate->crtc) {
312		DRM_DEBUG_DRIVER("drm plane:%d not enabled\n",
313				 drm_plane->base.id);
314		return;
315	}
316
317	DRM_DEBUG_DRIVER("CRTC:%d (%s) drm plane:%d (%s)\n",
318			 oldstate->crtc->base.id,
319			 sti_mixer_to_str(to_sti_mixer(oldstate->crtc)),
320			 drm_plane->base.id, sti_plane_to_str(plane));
321
322	plane->status = STI_PLANE_DISABLING;
323}
324
325static const struct drm_plane_helper_funcs sti_cursor_helpers_funcs = {
326	.atomic_check = sti_cursor_atomic_check,
327	.atomic_update = sti_cursor_atomic_update,
328	.atomic_disable = sti_cursor_atomic_disable,
329};
330
331static void sti_cursor_destroy(struct drm_plane *drm_plane)
332{
333	DRM_DEBUG_DRIVER("\n");
334
335	drm_plane_helper_disable(drm_plane);
336	drm_plane_cleanup(drm_plane);
337}
338
339static int sti_cursor_late_register(struct drm_plane *drm_plane)
340{
341	struct sti_plane *plane = to_sti_plane(drm_plane);
342	struct sti_cursor *cursor = to_sti_cursor(plane);
343
344	return cursor_debugfs_init(cursor, drm_plane->dev->primary);
345}
346
347static const struct drm_plane_funcs sti_cursor_plane_helpers_funcs = {
348	.update_plane = drm_atomic_helper_update_plane,
349	.disable_plane = drm_atomic_helper_disable_plane,
350	.destroy = sti_cursor_destroy,
351	.reset = sti_plane_reset,
352	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
353	.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
354	.late_register = sti_cursor_late_register,
355};
356
357struct drm_plane *sti_cursor_create(struct drm_device *drm_dev,
358				    struct device *dev, int desc,
359				    void __iomem *baseaddr,
360				    unsigned int possible_crtcs)
361{
362	struct sti_cursor *cursor;
363	size_t size;
364	int res;
365
366	cursor = devm_kzalloc(dev, sizeof(*cursor), GFP_KERNEL);
367	if (!cursor) {
368		DRM_ERROR("Failed to allocate memory for cursor\n");
369		return NULL;
370	}
371
372	/* Allocate clut buffer */
373	size = 0x100 * sizeof(unsigned short);
374	cursor->clut = dma_alloc_wc(dev, size, &cursor->clut_paddr,
375				    GFP_KERNEL | GFP_DMA);
376
377	if (!cursor->clut) {
378		DRM_ERROR("Failed to allocate memory for cursor clut\n");
379		goto err_clut;
380	}
381
382	cursor->dev = dev;
383	cursor->regs = baseaddr;
384	cursor->plane.desc = desc;
385	cursor->plane.status = STI_PLANE_DISABLED;
386
387	sti_cursor_init(cursor);
388
389	res = drm_universal_plane_init(drm_dev, &cursor->plane.drm_plane,
390				       possible_crtcs,
391				       &sti_cursor_plane_helpers_funcs,
392				       cursor_supported_formats,
393				       ARRAY_SIZE(cursor_supported_formats),
394				       NULL, DRM_PLANE_TYPE_CURSOR, NULL);
395	if (res) {
396		DRM_ERROR("Failed to initialize universal plane\n");
397		goto err_plane;
398	}
399
400	drm_plane_helper_add(&cursor->plane.drm_plane,
401			     &sti_cursor_helpers_funcs);
402
403	sti_plane_init_property(&cursor->plane, DRM_PLANE_TYPE_CURSOR);
404
405	return &cursor->plane.drm_plane;
406
407err_plane:
408	dma_free_wc(dev, size, cursor->clut, cursor->clut_paddr);
409err_clut:
410	devm_kfree(dev, cursor);
411	return NULL;
412}