2 * rcar_du_kms.c -- R-Car Display Unit Mode Setting
4 * Copyright (C) 2013 Renesas Corporation
6 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
15 #include <drm/drm_crtc.h>
16 #include <drm/drm_crtc_helper.h>
17 #include <drm/drm_fb_cma_helper.h>
18 #include <drm/drm_gem_cma_helper.h>
20 #include "rcar_du_crtc.h"
21 #include "rcar_du_drv.h"
22 #include "rcar_du_encoder.h"
23 #include "rcar_du_kms.h"
24 #include "rcar_du_lvdsenc.h"
25 #include "rcar_du_regs.h"
27 /* -----------------------------------------------------------------------------
31 static const struct rcar_du_format_info rcar_du_format_infos[] = {
33 .fourcc = DRM_FORMAT_RGB565,
36 .pnmr = PnMR_SPIM_TP | PnMR_DDDF_16BPP,
37 .edf = PnDDCR4_EDF_NONE,
39 .fourcc = DRM_FORMAT_ARGB1555,
42 .pnmr = PnMR_SPIM_ALP | PnMR_DDDF_ARGB,
43 .edf = PnDDCR4_EDF_NONE,
45 .fourcc = DRM_FORMAT_XRGB1555,
48 .pnmr = PnMR_SPIM_ALP | PnMR_DDDF_ARGB,
49 .edf = PnDDCR4_EDF_NONE,
51 .fourcc = DRM_FORMAT_XRGB8888,
54 .pnmr = PnMR_SPIM_TP | PnMR_DDDF_16BPP,
55 .edf = PnDDCR4_EDF_RGB888,
57 .fourcc = DRM_FORMAT_ARGB8888,
60 .pnmr = PnMR_SPIM_ALP | PnMR_DDDF_16BPP,
61 .edf = PnDDCR4_EDF_ARGB8888,
63 .fourcc = DRM_FORMAT_UYVY,
66 .pnmr = PnMR_SPIM_TP_OFF | PnMR_DDDF_YC,
67 .edf = PnDDCR4_EDF_NONE,
69 .fourcc = DRM_FORMAT_YUYV,
72 .pnmr = PnMR_SPIM_TP_OFF | PnMR_DDDF_YC,
73 .edf = PnDDCR4_EDF_NONE,
75 .fourcc = DRM_FORMAT_NV12,
78 .pnmr = PnMR_SPIM_TP_OFF | PnMR_DDDF_YC,
79 .edf = PnDDCR4_EDF_NONE,
81 .fourcc = DRM_FORMAT_NV21,
84 .pnmr = PnMR_SPIM_TP_OFF | PnMR_DDDF_YC,
85 .edf = PnDDCR4_EDF_NONE,
87 /* In YUV 4:2:2, only NV16 is supported (NV61 isn't) */
88 .fourcc = DRM_FORMAT_NV16,
91 .pnmr = PnMR_SPIM_TP_OFF | PnMR_DDDF_YC,
92 .edf = PnDDCR4_EDF_NONE,
96 const struct rcar_du_format_info *rcar_du_format_info(u32 fourcc)
100 for (i = 0; i < ARRAY_SIZE(rcar_du_format_infos); ++i) {
101 if (rcar_du_format_infos[i].fourcc == fourcc)
102 return &rcar_du_format_infos[i];
108 /* -----------------------------------------------------------------------------
112 int rcar_du_dumb_create(struct drm_file *file, struct drm_device *dev,
113 struct drm_mode_create_dumb *args)
115 struct rcar_du_device *rcdu = dev->dev_private;
116 unsigned int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
119 /* The R8A7779 DU requires a 16 pixels pitch alignment as documented,
120 * but the R8A7790 DU seems to require a 128 bytes pitch alignment.
122 if (rcar_du_needs(rcdu, RCAR_DU_QUIRK_ALIGN_128B))
125 align = 16 * args->bpp / 8;
127 args->pitch = roundup(max(args->pitch, min_pitch), align);
129 return drm_gem_cma_dumb_create(file, dev, args);
132 static struct drm_framebuffer *
133 rcar_du_fb_create(struct drm_device *dev, struct drm_file *file_priv,
134 struct drm_mode_fb_cmd2 *mode_cmd)
136 struct rcar_du_device *rcdu = dev->dev_private;
137 const struct rcar_du_format_info *format;
138 unsigned int max_pitch;
142 format = rcar_du_format_info(mode_cmd->pixel_format);
143 if (format == NULL) {
144 dev_dbg(dev->dev, "unsupported pixel format %08x\n",
145 mode_cmd->pixel_format);
146 return ERR_PTR(-EINVAL);
150 * The pitch and alignment constraints are expressed in pixels on the
151 * hardware side and in bytes in the DRM API.
153 bpp = format->planes == 2 ? 1 : format->bpp / 8;
154 max_pitch = 4096 * bpp;
156 if (rcar_du_needs(rcdu, RCAR_DU_QUIRK_ALIGN_128B))
161 if (mode_cmd->pitches[0] & (align - 1) ||
162 mode_cmd->pitches[0] >= max_pitch) {
163 dev_dbg(dev->dev, "invalid pitch value %u\n",
164 mode_cmd->pitches[0]);
165 return ERR_PTR(-EINVAL);
168 if (format->planes == 2) {
169 if (mode_cmd->pitches[1] != mode_cmd->pitches[0]) {
171 "luma and chroma pitches do not match\n");
172 return ERR_PTR(-EINVAL);
176 return drm_fb_cma_create(dev, file_priv, mode_cmd);
179 static void rcar_du_output_poll_changed(struct drm_device *dev)
181 struct rcar_du_device *rcdu = dev->dev_private;
183 drm_fbdev_cma_hotplug_event(rcdu->fbdev);
186 static const struct drm_mode_config_funcs rcar_du_mode_config_funcs = {
187 .fb_create = rcar_du_fb_create,
188 .output_poll_changed = rcar_du_output_poll_changed,
191 int rcar_du_modeset_init(struct rcar_du_device *rcdu)
193 static const unsigned int mmio_offsets[] = {
194 DU0_REG_OFFSET, DU2_REG_OFFSET
197 struct drm_device *dev = rcdu->ddev;
198 struct drm_encoder *encoder;
199 struct drm_fbdev_cma *fbdev;
200 unsigned int num_groups;
204 drm_mode_config_init(dev);
206 dev->mode_config.min_width = 0;
207 dev->mode_config.min_height = 0;
208 dev->mode_config.max_width = 4095;
209 dev->mode_config.max_height = 2047;
210 dev->mode_config.funcs = &rcar_du_mode_config_funcs;
212 rcdu->num_crtcs = rcdu->info->num_crtcs;
214 /* Initialize the groups. */
215 num_groups = DIV_ROUND_UP(rcdu->num_crtcs, 2);
217 for (i = 0; i < num_groups; ++i) {
218 struct rcar_du_group *rgrp = &rcdu->groups[i];
221 rgrp->mmio_offset = mmio_offsets[i];
224 ret = rcar_du_planes_init(rgrp);
229 /* Create the CRTCs. */
230 for (i = 0; i < rcdu->num_crtcs; ++i) {
231 struct rcar_du_group *rgrp = &rcdu->groups[i / 2];
233 ret = rcar_du_crtc_create(rgrp, i);
238 /* Initialize the encoders. */
239 ret = rcar_du_lvdsenc_init(rcdu);
243 for (i = 0; i < rcdu->pdata->num_encoders; ++i) {
244 const struct rcar_du_encoder_data *pdata =
245 &rcdu->pdata->encoders[i];
246 const struct rcar_du_output_routing *route =
247 &rcdu->info->routes[pdata->output];
249 if (pdata->type == RCAR_DU_ENCODER_UNUSED)
252 if (pdata->output >= RCAR_DU_OUTPUT_MAX ||
253 route->possible_crtcs == 0) {
255 "encoder %u references unexisting output %u, skipping\n",
260 ret = rcar_du_encoder_init(rcdu, pdata->type, pdata->output,
266 /* Set the possible CRTCs and possible clones. There's always at least
267 * one way for all encoders to clone each other, set all bits in the
268 * possible clones field.
270 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
271 struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
272 const struct rcar_du_output_routing *route =
273 &rcdu->info->routes[renc->output];
275 encoder->possible_crtcs = route->possible_crtcs;
276 encoder->possible_clones = (1 << rcdu->pdata->num_encoders) - 1;
279 /* Now that the CRTCs have been initialized register the planes. */
280 for (i = 0; i < num_groups; ++i) {
281 ret = rcar_du_planes_register(&rcdu->groups[i]);
286 drm_kms_helper_poll_init(dev);
288 drm_helper_disable_unused_functions(dev);
290 fbdev = drm_fbdev_cma_init(dev, 32, dev->mode_config.num_crtc,
291 dev->mode_config.num_connector);
293 return PTR_ERR(fbdev);
295 #ifndef CONFIG_FRAMEBUFFER_CONSOLE
296 drm_fbdev_cma_restore_mode(fbdev);