tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (C) 2011 Samsung Electronics Co.Ltd
3 * Authors: Joonyoung Shim <jy0922.shim@samsung.com>
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
9 *
10 */
11
12#include <drm/drmP.h>
13
14#include <drm/exynos_drm.h>
15#include "exynos_drm_drv.h"
16#include "exynos_drm_encoder.h"
17#include "exynos_drm_fb.h"
18#include "exynos_drm_gem.h"
19
20#define to_exynos_plane(x) container_of(x, struct exynos_plane, base)
21
22struct exynos_plane {
23 struct drm_plane base;
24 struct exynos_drm_overlay overlay;
25 bool enabled;
26};
27
28static const uint32_t formats[] = {
29 DRM_FORMAT_XRGB8888,
30 DRM_FORMAT_ARGB8888,
31 DRM_FORMAT_NV12,
32 DRM_FORMAT_NV12MT,
33};
34
35/*
36 * This function is to get X or Y size shown via screen. This needs length and
37 * start position of CRTC.
38 *
39 * <--- length --->
40 * CRTC ----------------
41 * ^ start ^ end
42 *
43 * There are six cases from a to f.
44 *
45 * <----- SCREEN ----->
46 * 0 last
47 * ----------|------------------|----------
48 * CRTCs
49 * a -------
50 * b -------
51 * c --------------------------
52 * d --------
53 * e -------
54 * f -------
55 */
56static int exynos_plane_get_size(int start, unsigned length, unsigned last)
57{
58 int end = start + length;
59 int size = 0;
60
61 if (start <= 0) {
62 if (end > 0)
63 size = min_t(unsigned, end, last);
64 } else if (start <= last) {
65 size = min_t(unsigned, last - start, length);
66 }
67
68 return size;
69}
70
71int exynos_plane_mode_set(struct drm_plane *plane, struct drm_crtc *crtc,
72 struct drm_framebuffer *fb, int crtc_x, int crtc_y,
73 unsigned int crtc_w, unsigned int crtc_h,
74 uint32_t src_x, uint32_t src_y,
75 uint32_t src_w, uint32_t src_h)
76{
77 struct exynos_plane *exynos_plane = to_exynos_plane(plane);
78 struct exynos_drm_overlay *overlay = &exynos_plane->overlay;
79 unsigned int actual_w;
80 unsigned int actual_h;
81 int nr;
82 int i;
83
84 DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
85
86 nr = exynos_drm_fb_get_buf_cnt(fb);
87 for (i = 0; i < nr; i++) {
88 struct exynos_drm_gem_buf *buffer = exynos_drm_fb_buffer(fb, i);
89
90 if (!buffer) {
91 DRM_LOG_KMS("buffer is null\n");
92 return -EFAULT;
93 }
94
95 overlay->dma_addr[i] = buffer->dma_addr;
96
97 DRM_DEBUG_KMS("buffer: %d, dma_addr = 0x%lx\n",
98 i, (unsigned long)overlay->dma_addr[i]);
99 }
100
101 actual_w = exynos_plane_get_size(crtc_x, crtc_w, crtc->mode.hdisplay);
102 actual_h = exynos_plane_get_size(crtc_y, crtc_h, crtc->mode.vdisplay);
103
104 if (crtc_x < 0) {
105 if (actual_w)
106 src_x -= crtc_x;
107 crtc_x = 0;
108 }
109
110 if (crtc_y < 0) {
111 if (actual_h)
112 src_y -= crtc_y;
113 crtc_y = 0;
114 }
115
116 /* set drm framebuffer data. */
117 overlay->fb_x = src_x;
118 overlay->fb_y = src_y;
119 overlay->fb_width = fb->width;
120 overlay->fb_height = fb->height;
121 overlay->src_width = src_w;
122 overlay->src_height = src_h;
123 overlay->bpp = fb->bits_per_pixel;
124 overlay->pitch = fb->pitches[0];
125 overlay->pixel_format = fb->pixel_format;
126
127 /* set overlay range to be displayed. */
128 overlay->crtc_x = crtc_x;
129 overlay->crtc_y = crtc_y;
130 overlay->crtc_width = actual_w;
131 overlay->crtc_height = actual_h;
132
133 /* set drm mode data. */
134 overlay->mode_width = crtc->mode.hdisplay;
135 overlay->mode_height = crtc->mode.vdisplay;
136 overlay->refresh = crtc->mode.vrefresh;
137 overlay->scan_flag = crtc->mode.flags;
138
139 DRM_DEBUG_KMS("overlay : offset_x/y(%d,%d), width/height(%d,%d)",
140 overlay->crtc_x, overlay->crtc_y,
141 overlay->crtc_width, overlay->crtc_height);
142
143 exynos_drm_fn_encoder(crtc, overlay, exynos_drm_encoder_plane_mode_set);
144
145 return 0;
146}
147
148void exynos_plane_commit(struct drm_plane *plane)
149{
150 struct exynos_plane *exynos_plane = to_exynos_plane(plane);
151 struct exynos_drm_overlay *overlay = &exynos_plane->overlay;
152
153 exynos_drm_fn_encoder(plane->crtc, &overlay->zpos,
154 exynos_drm_encoder_plane_commit);
155}
156
157void exynos_plane_dpms(struct drm_plane *plane, int mode)
158{
159 struct exynos_plane *exynos_plane = to_exynos_plane(plane);
160 struct exynos_drm_overlay *overlay = &exynos_plane->overlay;
161
162 DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
163
164 if (mode == DRM_MODE_DPMS_ON) {
165 if (exynos_plane->enabled)
166 return;
167
168 exynos_drm_fn_encoder(plane->crtc, &overlay->zpos,
169 exynos_drm_encoder_plane_enable);
170
171 exynos_plane->enabled = true;
172 } else {
173 if (!exynos_plane->enabled)
174 return;
175
176 exynos_drm_fn_encoder(plane->crtc, &overlay->zpos,
177 exynos_drm_encoder_plane_disable);
178
179 exynos_plane->enabled = false;
180 }
181}
182
183static int
184exynos_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
185 struct drm_framebuffer *fb, int crtc_x, int crtc_y,
186 unsigned int crtc_w, unsigned int crtc_h,
187 uint32_t src_x, uint32_t src_y,
188 uint32_t src_w, uint32_t src_h)
189{
190 int ret;
191
192 DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
193
194 ret = exynos_plane_mode_set(plane, crtc, fb, crtc_x, crtc_y,
195 crtc_w, crtc_h, src_x >> 16, src_y >> 16,
196 src_w >> 16, src_h >> 16);
197 if (ret < 0)
198 return ret;
199
200 plane->crtc = crtc;
201
202 exynos_plane_commit(plane);
203 exynos_plane_dpms(plane, DRM_MODE_DPMS_ON);
204
205 return 0;
206}
207
208static int exynos_disable_plane(struct drm_plane *plane)
209{
210 DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
211
212 exynos_plane_dpms(plane, DRM_MODE_DPMS_OFF);
213
214 return 0;
215}
216
217static void exynos_plane_destroy(struct drm_plane *plane)
218{
219 struct exynos_plane *exynos_plane = to_exynos_plane(plane);
220
221 DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
222
223 exynos_disable_plane(plane);
224 drm_plane_cleanup(plane);
225 kfree(exynos_plane);
226}
227
228static int exynos_plane_set_property(struct drm_plane *plane,
229 struct drm_property *property,
230 uint64_t val)
231{
232 struct drm_device *dev = plane->dev;
233 struct exynos_plane *exynos_plane = to_exynos_plane(plane);
234 struct exynos_drm_private *dev_priv = dev->dev_private;
235
236 DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
237
238 if (property == dev_priv->plane_zpos_property) {
239 exynos_plane->overlay.zpos = val;
240 return 0;
241 }
242
243 return -EINVAL;
244}
245
246static struct drm_plane_funcs exynos_plane_funcs = {
247 .update_plane = exynos_update_plane,
248 .disable_plane = exynos_disable_plane,
249 .destroy = exynos_plane_destroy,
250 .set_property = exynos_plane_set_property,
251};
252
253static void exynos_plane_attach_zpos_property(struct drm_plane *plane)
254{
255 struct drm_device *dev = plane->dev;
256 struct exynos_drm_private *dev_priv = dev->dev_private;
257 struct drm_property *prop;
258
259 DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
260
261 prop = dev_priv->plane_zpos_property;
262 if (!prop) {
263 prop = drm_property_create_range(dev, 0, "zpos", 0,
264 MAX_PLANE - 1);
265 if (!prop)
266 return;
267
268 dev_priv->plane_zpos_property = prop;
269 }
270
271 drm_object_attach_property(&plane->base, prop, 0);
272}
273
274struct drm_plane *exynos_plane_init(struct drm_device *dev,
275 unsigned int possible_crtcs, bool priv)
276{
277 struct exynos_plane *exynos_plane;
278 int err;
279
280 DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
281
282 exynos_plane = kzalloc(sizeof(struct exynos_plane), GFP_KERNEL);
283 if (!exynos_plane) {
284 DRM_ERROR("failed to allocate plane\n");
285 return NULL;
286 }
287
288 err = drm_plane_init(dev, &exynos_plane->base, possible_crtcs,
289 &exynos_plane_funcs, formats, ARRAY_SIZE(formats),
290 priv);
291 if (err) {
292 DRM_ERROR("failed to initialize plane\n");
293 kfree(exynos_plane);
294 return NULL;
295 }
296
297 if (priv)
298 exynos_plane->overlay.zpos = DEFAULT_ZPOS;
299 else
300 exynos_plane_attach_zpos_property(&exynos_plane->base);
301
302 return &exynos_plane->base;
303}