Merge branches 'arm/rockchip', 'arm/exynos', 'arm/smmu', 'x86/vt-d', 'x86/amd', ...
[sfrench/cifs-2.6.git] / drivers / gpu / drm / exynos / exynos_drm_plane.c
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
22 static 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  */
49 static 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
64 int 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 + fb->offsets[i];
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
88 void 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         unsigned int actual_w;
96         unsigned int actual_h;
97
98         actual_w = exynos_plane_get_size(crtc_x, crtc_w, crtc->mode.hdisplay);
99         actual_h = exynos_plane_get_size(crtc_y, crtc_h, crtc->mode.vdisplay);
100
101         if (crtc_x < 0) {
102                 if (actual_w)
103                         src_x -= crtc_x;
104                 crtc_x = 0;
105         }
106
107         if (crtc_y < 0) {
108                 if (actual_h)
109                         src_y -= crtc_y;
110                 crtc_y = 0;
111         }
112
113         /* set ratio */
114         exynos_plane->h_ratio = (src_w << 16) / crtc_w;
115         exynos_plane->v_ratio = (src_h << 16) / crtc_h;
116
117         /* set drm framebuffer data. */
118         exynos_plane->src_x = src_x;
119         exynos_plane->src_y = src_y;
120         exynos_plane->src_width = (actual_w * exynos_plane->h_ratio) >> 16;
121         exynos_plane->src_height = (actual_h * exynos_plane->v_ratio) >> 16;
122         exynos_plane->fb_width = fb->width;
123         exynos_plane->fb_height = fb->height;
124         exynos_plane->bpp = fb->bits_per_pixel;
125         exynos_plane->pitch = fb->pitches[0];
126         exynos_plane->pixel_format = fb->pixel_format;
127
128         /* set plane range to be displayed. */
129         exynos_plane->crtc_x = crtc_x;
130         exynos_plane->crtc_y = crtc_y;
131         exynos_plane->crtc_width = actual_w;
132         exynos_plane->crtc_height = actual_h;
133
134         /* set drm mode data. */
135         exynos_plane->mode_width = crtc->mode.hdisplay;
136         exynos_plane->mode_height = crtc->mode.vdisplay;
137         exynos_plane->refresh = crtc->mode.vrefresh;
138         exynos_plane->scan_flag = crtc->mode.flags;
139
140         DRM_DEBUG_KMS("plane : offset_x/y(%d,%d), width/height(%d,%d)",
141                         exynos_plane->crtc_x, exynos_plane->crtc_y,
142                         exynos_plane->crtc_width, exynos_plane->crtc_height);
143
144         plane->crtc = crtc;
145 }
146
147 int
148 exynos_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
173 static 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
185 static struct drm_plane_funcs exynos_plane_funcs = {
186         .update_plane   = exynos_update_plane,
187         .disable_plane  = exynos_disable_plane,
188         .destroy        = drm_plane_cleanup,
189 };
190
191 static void exynos_plane_attach_zpos_property(struct drm_plane *plane,
192                                               unsigned int zpos)
193 {
194         struct drm_device *dev = plane->dev;
195         struct exynos_drm_private *dev_priv = dev->dev_private;
196         struct drm_property *prop;
197
198         prop = dev_priv->plane_zpos_property;
199         if (!prop) {
200                 prop = drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE,
201                                                  "zpos", 0, MAX_PLANE - 1);
202                 if (!prop)
203                         return;
204
205                 dev_priv->plane_zpos_property = prop;
206         }
207
208         drm_object_attach_property(&plane->base, prop, zpos);
209 }
210
211 int exynos_plane_init(struct drm_device *dev,
212                       struct exynos_drm_plane *exynos_plane,
213                       unsigned long possible_crtcs, enum drm_plane_type type,
214                       unsigned int zpos)
215 {
216         int err;
217
218         err = drm_universal_plane_init(dev, &exynos_plane->base, possible_crtcs,
219                                        &exynos_plane_funcs, formats,
220                                        ARRAY_SIZE(formats), type);
221         if (err) {
222                 DRM_ERROR("failed to initialize plane\n");
223                 return err;
224         }
225
226         exynos_plane->zpos = zpos;
227
228         if (type == DRM_PLANE_TYPE_OVERLAY)
229                 exynos_plane_attach_zpos_property(&exynos_plane->base, zpos);
230
231         return 0;
232 }