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 <drm/drm_plane_helper.h>
16#include "exynos_drm_drv.h"
17#include "exynos_drm_crtc.h"
18#include "exynos_drm_fb.h"
19#include "exynos_drm_gem.h"
20#include "exynos_drm_plane.h"
21
22static const uint32_t formats[] = {
23 DRM_FORMAT_XRGB8888,
24 DRM_FORMAT_ARGB8888,
25 DRM_FORMAT_NV12,
26};
27
28/*
29 * This function is to get X or Y size shown via screen. This needs length and
30 * start position of CRTC.
31 *
32 * <--- length --->
33 * CRTC ----------------
34 * ^ start ^ end
35 *
36 * There are six cases from a to f.
37 *
38 * <----- SCREEN ----->
39 * 0 last
40 * ----------|------------------|----------
41 * CRTCs
42 * a -------
43 * b -------
44 * c --------------------------
45 * d --------
46 * e -------
47 * f -------
48 */
49static int exynos_plane_get_size(int start, unsigned length, unsigned last)
50{
51 int end = start + length;
52 int size = 0;
53
54 if (start <= 0) {
55 if (end > 0)
56 size = min_t(unsigned, end, last);
57 } else if (start <= last) {
58 size = min_t(unsigned, last - start, length);
59 }
60
61 return size;
62}
63
64int exynos_check_plane(struct drm_plane *plane, struct drm_framebuffer *fb)
65{
66 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
67 int nr;
68 int i;
69
70 nr = exynos_drm_fb_get_buf_cnt(fb);
71 for (i = 0; i < nr; i++) {
72 struct exynos_drm_gem_buf *buffer = exynos_drm_fb_buffer(fb, i);
73
74 if (!buffer) {
75 DRM_DEBUG_KMS("buffer is null\n");
76 return -EFAULT;
77 }
78
79 exynos_plane->dma_addr[i] = buffer->dma_addr;
80
81 DRM_DEBUG_KMS("buffer: %d, dma_addr = 0x%lx\n",
82 i, (unsigned long)exynos_plane->dma_addr[i]);
83 }
84
85 return 0;
86}
87
88void exynos_plane_mode_set(struct drm_plane *plane, struct drm_crtc *crtc,
89 struct drm_framebuffer *fb, int crtc_x, int crtc_y,
90 unsigned int crtc_w, unsigned int crtc_h,
91 uint32_t src_x, uint32_t src_y,
92 uint32_t src_w, uint32_t src_h)
93{
94 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
95 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
96 unsigned int actual_w;
97 unsigned int actual_h;
98
99 actual_w = exynos_plane_get_size(crtc_x, crtc_w, crtc->mode.hdisplay);
100 actual_h = exynos_plane_get_size(crtc_y, crtc_h, crtc->mode.vdisplay);
101
102 if (crtc_x < 0) {
103 if (actual_w)
104 src_x -= crtc_x;
105 crtc_x = 0;
106 }
107
108 if (crtc_y < 0) {
109 if (actual_h)
110 src_y -= crtc_y;
111 crtc_y = 0;
112 }
113
114 /* set drm framebuffer data. */
115 exynos_plane->fb_x = src_x;
116 exynos_plane->fb_y = src_y;
117 exynos_plane->fb_width = fb->width;
118 exynos_plane->fb_height = fb->height;
119 exynos_plane->src_width = src_w;
120 exynos_plane->src_height = src_h;
121 exynos_plane->bpp = fb->bits_per_pixel;
122 exynos_plane->pitch = fb->pitches[0];
123 exynos_plane->pixel_format = fb->pixel_format;
124
125 /* set plane range to be displayed. */
126 exynos_plane->crtc_x = crtc_x;
127 exynos_plane->crtc_y = crtc_y;
128 exynos_plane->crtc_width = actual_w;
129 exynos_plane->crtc_height = actual_h;
130
131 /* set drm mode data. */
132 exynos_plane->mode_width = crtc->mode.hdisplay;
133 exynos_plane->mode_height = crtc->mode.vdisplay;
134 exynos_plane->refresh = crtc->mode.vrefresh;
135 exynos_plane->scan_flag = crtc->mode.flags;
136
137 DRM_DEBUG_KMS("plane : offset_x/y(%d,%d), width/height(%d,%d)",
138 exynos_plane->crtc_x, exynos_plane->crtc_y,
139 exynos_plane->crtc_width, exynos_plane->crtc_height);
140
141 plane->crtc = crtc;
142
143 if (exynos_crtc->ops->win_mode_set)
144 exynos_crtc->ops->win_mode_set(exynos_crtc, exynos_plane);
145}
146
147int
148exynos_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
149 struct drm_framebuffer *fb, int crtc_x, int crtc_y,
150 unsigned int crtc_w, unsigned int crtc_h,
151 uint32_t src_x, uint32_t src_y,
152 uint32_t src_w, uint32_t src_h)
153{
154
155 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
156 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
157 int ret;
158
159 ret = exynos_check_plane(plane, fb);
160 if (ret < 0)
161 return ret;
162
163 exynos_plane_mode_set(plane, crtc, fb, crtc_x, crtc_y,
164 crtc_w, crtc_h, src_x >> 16, src_y >> 16,
165 src_w >> 16, src_h >> 16);
166
167 if (exynos_crtc->ops->win_commit)
168 exynos_crtc->ops->win_commit(exynos_crtc, exynos_plane->zpos);
169
170 return 0;
171}
172
173static int exynos_disable_plane(struct drm_plane *plane)
174{
175 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
176 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(plane->crtc);
177
178 if (exynos_crtc && exynos_crtc->ops->win_disable)
179 exynos_crtc->ops->win_disable(exynos_crtc,
180 exynos_plane->zpos);
181
182 return 0;
183}
184
185static void exynos_plane_destroy(struct drm_plane *plane)
186{
187 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
188
189 exynos_disable_plane(plane);
190 drm_plane_cleanup(plane);
191 kfree(exynos_plane);
192}
193
194static int exynos_plane_set_property(struct drm_plane *plane,
195 struct drm_property *property,
196 uint64_t val)
197{
198 struct drm_device *dev = plane->dev;
199 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
200 struct exynos_drm_private *dev_priv = dev->dev_private;
201
202 if (property == dev_priv->plane_zpos_property) {
203 exynos_plane->zpos = val;
204 return 0;
205 }
206
207 return -EINVAL;
208}
209
210static struct drm_plane_funcs exynos_plane_funcs = {
211 .update_plane = exynos_update_plane,
212 .disable_plane = exynos_disable_plane,
213 .destroy = exynos_plane_destroy,
214 .set_property = exynos_plane_set_property,
215};
216
217static void exynos_plane_attach_zpos_property(struct drm_plane *plane)
218{
219 struct drm_device *dev = plane->dev;
220 struct exynos_drm_private *dev_priv = dev->dev_private;
221 struct drm_property *prop;
222
223 prop = dev_priv->plane_zpos_property;
224 if (!prop) {
225 prop = drm_property_create_range(dev, 0, "zpos", 0,
226 MAX_PLANE - 1);
227 if (!prop)
228 return;
229
230 dev_priv->plane_zpos_property = prop;
231 }
232
233 drm_object_attach_property(&plane->base, prop, 0);
234}
235
236struct drm_plane *exynos_plane_init(struct drm_device *dev,
237 unsigned long possible_crtcs,
238 enum drm_plane_type type)
239{
240 struct exynos_drm_plane *exynos_plane;
241 int err;
242
243 exynos_plane = kzalloc(sizeof(struct exynos_drm_plane), GFP_KERNEL);
244 if (!exynos_plane)
245 return ERR_PTR(-ENOMEM);
246
247 err = drm_universal_plane_init(dev, &exynos_plane->base, possible_crtcs,
248 &exynos_plane_funcs, formats,
249 ARRAY_SIZE(formats), type);
250 if (err) {
251 DRM_ERROR("failed to initialize plane\n");
252 kfree(exynos_plane);
253 return ERR_PTR(err);
254 }
255
256 if (type == DRM_PLANE_TYPE_PRIMARY)
257 exynos_plane->zpos = DEFAULT_ZPOS;
258 else
259 exynos_plane_attach_zpos_property(&exynos_plane->base);
260
261 return &exynos_plane->base;
262}