2 * Copyright 2015 Freescale Semiconductor, Inc.
4 * Freescale DCU drm device driver
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
12 #include <linux/regmap.h>
15 #include <drm/drm_atomic_helper.h>
16 #include <drm/drm_crtc.h>
17 #include <drm/drm_crtc_helper.h>
18 #include <drm/drm_fb_cma_helper.h>
19 #include <drm/drm_gem_cma_helper.h>
20 #include <drm/drm_plane_helper.h>
22 #include "fsl_dcu_drm_drv.h"
23 #include "fsl_dcu_drm_plane.h"
25 static int fsl_dcu_drm_plane_index(struct drm_plane *plane)
27 struct fsl_dcu_drm_device *fsl_dev = plane->dev->dev_private;
28 unsigned int total_layer = fsl_dev->soc->total_layer;
31 index = drm_plane_index(plane);
32 if (index < total_layer)
33 return total_layer - index - 1;
35 dev_err(fsl_dev->dev, "No more layer left\n");
39 static int fsl_dcu_drm_plane_atomic_check(struct drm_plane *plane,
40 struct drm_plane_state *state)
42 struct drm_framebuffer *fb = state->fb;
44 switch (fb->pixel_format) {
45 case DRM_FORMAT_RGB565:
46 case DRM_FORMAT_RGB888:
47 case DRM_FORMAT_ARGB8888:
48 case DRM_FORMAT_BGRA4444:
49 case DRM_FORMAT_ARGB1555:
50 case DRM_FORMAT_YUV422:
57 static void fsl_dcu_drm_plane_atomic_disable(struct drm_plane *plane,
58 struct drm_plane_state *old_state)
60 struct fsl_dcu_drm_device *fsl_dev = plane->dev->dev_private;
64 index = fsl_dcu_drm_plane_index(plane);
68 ret = regmap_read(fsl_dev->regmap, DCU_CTRLDESCLN(index, 4), &value);
70 dev_err(fsl_dev->dev, "read DCU_INT_MASK failed\n");
71 value &= ~DCU_LAYER_EN;
72 ret = regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 4), value);
74 dev_err(fsl_dev->dev, "set DCU register failed\n");
77 static void fsl_dcu_drm_plane_atomic_update(struct drm_plane *plane,
78 struct drm_plane_state *old_state)
81 struct fsl_dcu_drm_device *fsl_dev = plane->dev->dev_private;
82 struct drm_plane_state *state = plane->state;
83 struct drm_framebuffer *fb = plane->state->fb;
84 struct drm_gem_cma_object *gem;
85 unsigned int alpha, bpp;
91 index = fsl_dcu_drm_plane_index(plane);
95 gem = drm_fb_cma_get_gem_obj(fb, 0);
97 switch (fb->pixel_format) {
98 case DRM_FORMAT_RGB565:
102 case DRM_FORMAT_RGB888:
103 bpp = FSL_DCU_RGB888;
106 case DRM_FORMAT_ARGB8888:
107 bpp = FSL_DCU_ARGB8888;
110 case DRM_FORMAT_BGRA4444:
111 bpp = FSL_DCU_ARGB4444;
114 case DRM_FORMAT_ARGB1555:
115 bpp = FSL_DCU_ARGB1555;
118 case DRM_FORMAT_YUV422:
119 bpp = FSL_DCU_YUV422;
126 ret = regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 1),
127 DCU_LAYER_HEIGHT(state->crtc_h) |
128 DCU_LAYER_WIDTH(state->crtc_w));
131 ret = regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 2),
132 DCU_LAYER_POSY(state->crtc_y) |
133 DCU_LAYER_POSX(state->crtc_x));
136 ret = regmap_write(fsl_dev->regmap,
137 DCU_CTRLDESCLN(index, 3), gem->paddr);
140 ret = regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 4),
142 DCU_LAYER_TRANS(alpha) |
147 ret = regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 5),
148 DCU_LAYER_CKMAX_R(0xFF) |
149 DCU_LAYER_CKMAX_G(0xFF) |
150 DCU_LAYER_CKMAX_B(0xFF));
153 ret = regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 6),
154 DCU_LAYER_CKMIN_R(0) |
155 DCU_LAYER_CKMIN_G(0) |
156 DCU_LAYER_CKMIN_B(0));
159 ret = regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 7), 0);
162 ret = regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 8),
163 DCU_LAYER_FG_FCOLOR(0));
166 ret = regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 9),
167 DCU_LAYER_BG_BCOLOR(0));
170 if (!strcmp(fsl_dev->soc->name, "ls1021a")) {
171 ret = regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 10),
172 DCU_LAYER_POST_SKIP(0) |
173 DCU_LAYER_PRE_SKIP(0));
177 ret = regmap_update_bits(fsl_dev->regmap, DCU_DCU_MODE,
178 DCU_MODE_DCU_MODE_MASK,
179 DCU_MODE_DCU_MODE(DCU_MODE_NORMAL));
182 ret = regmap_write(fsl_dev->regmap,
183 DCU_UPDATE_MODE, DCU_UPDATE_MODE_READREG);
189 dev_err(fsl_dev->dev, "set DCU register failed\n");
193 fsl_dcu_drm_plane_cleanup_fb(struct drm_plane *plane,
194 struct drm_framebuffer *fb,
195 const struct drm_plane_state *new_state)
200 fsl_dcu_drm_plane_prepare_fb(struct drm_plane *plane,
201 struct drm_framebuffer *fb,
202 const struct drm_plane_state *new_state)
207 static const struct drm_plane_helper_funcs fsl_dcu_drm_plane_helper_funcs = {
208 .atomic_check = fsl_dcu_drm_plane_atomic_check,
209 .atomic_disable = fsl_dcu_drm_plane_atomic_disable,
210 .atomic_update = fsl_dcu_drm_plane_atomic_update,
211 .cleanup_fb = fsl_dcu_drm_plane_cleanup_fb,
212 .prepare_fb = fsl_dcu_drm_plane_prepare_fb,
215 static void fsl_dcu_drm_plane_destroy(struct drm_plane *plane)
217 drm_plane_cleanup(plane);
220 static const struct drm_plane_funcs fsl_dcu_drm_plane_funcs = {
221 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
222 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
223 .destroy = fsl_dcu_drm_plane_destroy,
224 .disable_plane = drm_atomic_helper_disable_plane,
225 .reset = drm_atomic_helper_plane_reset,
226 .update_plane = drm_atomic_helper_update_plane,
229 static const u32 fsl_dcu_drm_plane_formats[] = {
238 struct drm_plane *fsl_dcu_drm_primary_create_plane(struct drm_device *dev)
240 struct drm_plane *primary;
243 primary = kzalloc(sizeof(*primary), GFP_KERNEL);
245 DRM_DEBUG_KMS("Failed to allocate primary plane\n");
249 /* possible_crtc's will be filled in later by crtc_init */
250 ret = drm_universal_plane_init(dev, primary, 0,
251 &fsl_dcu_drm_plane_funcs,
252 fsl_dcu_drm_plane_formats,
253 ARRAY_SIZE(fsl_dcu_drm_plane_formats),
254 DRM_PLANE_TYPE_PRIMARY);
259 drm_plane_helper_add(primary, &fsl_dcu_drm_plane_helper_funcs);