2 * rcar_du_kms.c -- R-Car Display Unit Mode Setting
4 * Copyright (C) 2013-2015 Renesas Electronics 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_atomic.h>
16 #include <drm/drm_atomic_helper.h>
17 #include <drm/drm_crtc.h>
18 #include <drm/drm_crtc_helper.h>
19 #include <drm/drm_fb_cma_helper.h>
20 #include <drm/drm_gem_cma_helper.h>
22 #include <linux/of_graph.h>
23 #include <linux/wait.h>
25 #include "rcar_du_crtc.h"
26 #include "rcar_du_drv.h"
27 #include "rcar_du_encoder.h"
28 #include "rcar_du_kms.h"
29 #include "rcar_du_lvdsenc.h"
30 #include "rcar_du_regs.h"
31 #include "rcar_du_vsp.h"
33 /* -----------------------------------------------------------------------------
37 static const struct rcar_du_format_info rcar_du_format_infos[] = {
39 .fourcc = DRM_FORMAT_RGB565,
42 .pnmr = PnMR_SPIM_TP | PnMR_DDDF_16BPP,
43 .edf = PnDDCR4_EDF_NONE,
45 .fourcc = DRM_FORMAT_ARGB1555,
48 .pnmr = PnMR_SPIM_ALP | PnMR_DDDF_ARGB,
49 .edf = PnDDCR4_EDF_NONE,
51 .fourcc = DRM_FORMAT_XRGB1555,
54 .pnmr = PnMR_SPIM_ALP | PnMR_DDDF_ARGB,
55 .edf = PnDDCR4_EDF_NONE,
57 .fourcc = DRM_FORMAT_XRGB8888,
60 .pnmr = PnMR_SPIM_TP | PnMR_DDDF_16BPP,
61 .edf = PnDDCR4_EDF_RGB888,
63 .fourcc = DRM_FORMAT_ARGB8888,
66 .pnmr = PnMR_SPIM_ALP | PnMR_DDDF_16BPP,
67 .edf = PnDDCR4_EDF_ARGB8888,
69 .fourcc = DRM_FORMAT_UYVY,
72 .pnmr = PnMR_SPIM_TP_OFF | PnMR_DDDF_YC,
73 .edf = PnDDCR4_EDF_NONE,
75 .fourcc = DRM_FORMAT_YUYV,
78 .pnmr = PnMR_SPIM_TP_OFF | PnMR_DDDF_YC,
79 .edf = PnDDCR4_EDF_NONE,
81 .fourcc = DRM_FORMAT_NV12,
84 .pnmr = PnMR_SPIM_TP_OFF | PnMR_DDDF_YC,
85 .edf = PnDDCR4_EDF_NONE,
87 .fourcc = DRM_FORMAT_NV21,
90 .pnmr = PnMR_SPIM_TP_OFF | PnMR_DDDF_YC,
91 .edf = PnDDCR4_EDF_NONE,
93 .fourcc = DRM_FORMAT_NV16,
96 .pnmr = PnMR_SPIM_TP_OFF | PnMR_DDDF_YC,
97 .edf = PnDDCR4_EDF_NONE,
99 /* The following formats are not supported on Gen2 and thus have no
100 * associated .pnmr or .edf settings.
103 .fourcc = DRM_FORMAT_NV61,
107 .fourcc = DRM_FORMAT_YUV420,
111 .fourcc = DRM_FORMAT_YVU420,
115 .fourcc = DRM_FORMAT_YUV422,
119 .fourcc = DRM_FORMAT_YVU422,
123 .fourcc = DRM_FORMAT_YUV444,
127 .fourcc = DRM_FORMAT_YVU444,
133 const struct rcar_du_format_info *rcar_du_format_info(u32 fourcc)
137 for (i = 0; i < ARRAY_SIZE(rcar_du_format_infos); ++i) {
138 if (rcar_du_format_infos[i].fourcc == fourcc)
139 return &rcar_du_format_infos[i];
145 /* -----------------------------------------------------------------------------
149 int rcar_du_dumb_create(struct drm_file *file, struct drm_device *dev,
150 struct drm_mode_create_dumb *args)
152 struct rcar_du_device *rcdu = dev->dev_private;
153 unsigned int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
156 /* The R8A7779 DU requires a 16 pixels pitch alignment as documented,
157 * but the R8A7790 DU seems to require a 128 bytes pitch alignment.
159 if (rcar_du_needs(rcdu, RCAR_DU_QUIRK_ALIGN_128B))
162 align = 16 * args->bpp / 8;
164 args->pitch = roundup(min_pitch, align);
166 return drm_gem_cma_dumb_create_internal(file, dev, args);
169 static struct drm_framebuffer *
170 rcar_du_fb_create(struct drm_device *dev, struct drm_file *file_priv,
171 const struct drm_mode_fb_cmd2 *mode_cmd)
173 struct rcar_du_device *rcdu = dev->dev_private;
174 const struct rcar_du_format_info *format;
175 unsigned int max_pitch;
180 format = rcar_du_format_info(mode_cmd->pixel_format);
181 if (format == NULL) {
182 dev_dbg(dev->dev, "unsupported pixel format %08x\n",
183 mode_cmd->pixel_format);
184 return ERR_PTR(-EINVAL);
188 * The pitch and alignment constraints are expressed in pixels on the
189 * hardware side and in bytes in the DRM API.
191 bpp = format->planes == 1 ? format->bpp / 8 : 1;
192 max_pitch = 4096 * bpp;
194 if (rcar_du_needs(rcdu, RCAR_DU_QUIRK_ALIGN_128B))
199 if (mode_cmd->pitches[0] & (align - 1) ||
200 mode_cmd->pitches[0] >= max_pitch) {
201 dev_dbg(dev->dev, "invalid pitch value %u\n",
202 mode_cmd->pitches[0]);
203 return ERR_PTR(-EINVAL);
206 for (i = 1; i < format->planes; ++i) {
207 if (mode_cmd->pitches[i] != mode_cmd->pitches[0]) {
209 "luma and chroma pitches do not match\n");
210 return ERR_PTR(-EINVAL);
214 return drm_fb_cma_create(dev, file_priv, mode_cmd);
217 static void rcar_du_output_poll_changed(struct drm_device *dev)
219 struct rcar_du_device *rcdu = dev->dev_private;
221 drm_fbdev_cma_hotplug_event(rcdu->fbdev);
224 /* -----------------------------------------------------------------------------
225 * Atomic Check and Update
228 static int rcar_du_atomic_check(struct drm_device *dev,
229 struct drm_atomic_state *state)
231 struct rcar_du_device *rcdu = dev->dev_private;
234 ret = drm_atomic_helper_check(dev, state);
238 if (rcar_du_has(rcdu, RCAR_DU_FEATURE_VSP1_SOURCE))
241 return rcar_du_atomic_check_planes(dev, state);
244 struct rcar_du_commit {
245 struct work_struct work;
246 struct drm_device *dev;
247 struct drm_atomic_state *state;
251 static void rcar_du_atomic_complete(struct rcar_du_commit *commit)
253 struct drm_device *dev = commit->dev;
254 struct rcar_du_device *rcdu = dev->dev_private;
255 struct drm_atomic_state *old_state = commit->state;
257 /* Apply the atomic update. */
258 drm_atomic_helper_commit_modeset_disables(dev, old_state);
259 drm_atomic_helper_commit_modeset_enables(dev, old_state);
260 drm_atomic_helper_commit_planes(dev, old_state, true);
262 drm_atomic_helper_wait_for_vblanks(dev, old_state);
264 drm_atomic_helper_cleanup_planes(dev, old_state);
266 drm_atomic_state_free(old_state);
268 /* Complete the commit, wake up any waiter. */
269 spin_lock(&rcdu->commit.wait.lock);
270 rcdu->commit.pending &= ~commit->crtcs;
271 wake_up_all_locked(&rcdu->commit.wait);
272 spin_unlock(&rcdu->commit.wait.lock);
277 static void rcar_du_atomic_work(struct work_struct *work)
279 struct rcar_du_commit *commit =
280 container_of(work, struct rcar_du_commit, work);
282 rcar_du_atomic_complete(commit);
285 static int rcar_du_atomic_commit(struct drm_device *dev,
286 struct drm_atomic_state *state,
289 struct rcar_du_device *rcdu = dev->dev_private;
290 struct rcar_du_commit *commit;
294 ret = drm_atomic_helper_prepare_planes(dev, state);
298 /* Allocate the commit object. */
299 commit = kzalloc(sizeof(*commit), GFP_KERNEL);
300 if (commit == NULL) {
305 INIT_WORK(&commit->work, rcar_du_atomic_work);
307 commit->state = state;
309 /* Wait until all affected CRTCs have completed previous commits and
310 * mark them as pending.
312 for (i = 0; i < dev->mode_config.num_crtc; ++i) {
314 commit->crtcs |= 1 << drm_crtc_index(state->crtcs[i]);
317 spin_lock(&rcdu->commit.wait.lock);
318 ret = wait_event_interruptible_locked(rcdu->commit.wait,
319 !(rcdu->commit.pending & commit->crtcs));
321 rcdu->commit.pending |= commit->crtcs;
322 spin_unlock(&rcdu->commit.wait.lock);
329 /* Swap the state, this is the point of no return. */
330 drm_atomic_helper_swap_state(dev, state);
333 schedule_work(&commit->work);
335 rcar_du_atomic_complete(commit);
340 drm_atomic_helper_cleanup_planes(dev, state);
344 /* -----------------------------------------------------------------------------
348 static const struct drm_mode_config_funcs rcar_du_mode_config_funcs = {
349 .fb_create = rcar_du_fb_create,
350 .output_poll_changed = rcar_du_output_poll_changed,
351 .atomic_check = rcar_du_atomic_check,
352 .atomic_commit = rcar_du_atomic_commit,
355 static int rcar_du_encoders_init_one(struct rcar_du_device *rcdu,
356 enum rcar_du_output output,
357 struct of_endpoint *ep)
359 static const struct {
360 const char *compatible;
361 enum rcar_du_encoder_type type;
363 { "adi,adv7123", RCAR_DU_ENCODER_VGA },
364 { "adi,adv7511w", RCAR_DU_ENCODER_HDMI },
365 { "thine,thc63lvdm83d", RCAR_DU_ENCODER_LVDS },
368 enum rcar_du_encoder_type enc_type = RCAR_DU_ENCODER_NONE;
369 struct device_node *connector = NULL;
370 struct device_node *encoder = NULL;
371 struct device_node *ep_node = NULL;
372 struct device_node *entity_ep_node;
373 struct device_node *entity;
377 * Locate the connected entity and infer its type from the number of
380 entity = of_graph_get_remote_port_parent(ep->local_node);
382 dev_dbg(rcdu->dev, "unconnected endpoint %s, skipping\n",
383 ep->local_node->full_name);
387 entity_ep_node = of_parse_phandle(ep->local_node, "remote-endpoint", 0);
389 for_each_endpoint_of_node(entity, ep_node) {
390 if (ep_node == entity_ep_node)
394 * We've found one endpoint other than the input, this must
395 * be an encoder. Locate the connector.
398 connector = of_graph_get_remote_port_parent(ep_node);
399 of_node_put(ep_node);
403 "no connector for encoder %s, skipping\n",
405 of_node_put(entity_ep_node);
406 of_node_put(encoder);
413 of_node_put(entity_ep_node);
417 * If an encoder has been found, get its type based on its
422 for (i = 0; i < ARRAY_SIZE(encoders); ++i) {
423 if (of_device_is_compatible(encoder,
424 encoders[i].compatible)) {
425 enc_type = encoders[i].type;
430 if (i == ARRAY_SIZE(encoders)) {
432 "unknown encoder type for %s, skipping\n",
434 of_node_put(encoder);
435 of_node_put(connector);
440 * If no encoder has been found the entity must be the
446 ret = rcar_du_encoder_init(rcdu, enc_type, output, encoder, connector);
447 of_node_put(encoder);
448 of_node_put(connector);
450 if (ret && ret != -EPROBE_DEFER)
452 "failed to initialize encoder %s (%d), skipping\n",
453 encoder->full_name, ret);
458 static int rcar_du_encoders_init(struct rcar_du_device *rcdu)
460 struct device_node *np = rcdu->dev->of_node;
461 struct device_node *ep_node;
462 unsigned int num_encoders = 0;
465 * Iterate over the endpoints and create one encoder for each output
468 for_each_endpoint_of_node(np, ep_node) {
469 enum rcar_du_output output;
470 struct of_endpoint ep;
474 ret = of_graph_parse_endpoint(ep_node, &ep);
476 of_node_put(ep_node);
480 /* Find the output route corresponding to the port number. */
481 for (i = 0; i < RCAR_DU_OUTPUT_MAX; ++i) {
482 if (rcdu->info->routes[i].possible_crtcs &&
483 rcdu->info->routes[i].port == ep.port) {
489 if (i == RCAR_DU_OUTPUT_MAX) {
491 "port %u references unexisting output, skipping\n",
496 /* Process the output pipeline. */
497 ret = rcar_du_encoders_init_one(rcdu, output, &ep);
499 if (ret == -EPROBE_DEFER) {
500 of_node_put(ep_node);
513 static int rcar_du_properties_init(struct rcar_du_device *rcdu)
516 drm_property_create_range(rcdu->ddev, 0, "alpha", 0, 255);
517 if (rcdu->props.alpha == NULL)
520 /* The color key is expressed as an RGB888 triplet stored in a 32-bit
521 * integer in XRGB8888 format. Bit 24 is used as a flag to disable (0)
522 * or enable source color keying (1).
524 rcdu->props.colorkey =
525 drm_property_create_range(rcdu->ddev, 0, "colorkey",
527 if (rcdu->props.colorkey == NULL)
531 drm_property_create_range(rcdu->ddev, 0, "zpos", 1, 7);
532 if (rcdu->props.zpos == NULL)
538 int rcar_du_modeset_init(struct rcar_du_device *rcdu)
540 static const unsigned int mmio_offsets[] = {
541 DU0_REG_OFFSET, DU2_REG_OFFSET
544 struct drm_device *dev = rcdu->ddev;
545 struct drm_encoder *encoder;
546 struct drm_fbdev_cma *fbdev;
547 unsigned int num_encoders;
548 unsigned int num_groups;
552 drm_mode_config_init(dev);
554 dev->mode_config.min_width = 0;
555 dev->mode_config.min_height = 0;
556 dev->mode_config.max_width = 4095;
557 dev->mode_config.max_height = 2047;
558 dev->mode_config.funcs = &rcar_du_mode_config_funcs;
560 rcdu->num_crtcs = rcdu->info->num_crtcs;
562 ret = rcar_du_properties_init(rcdu);
566 /* Initialize the groups. */
567 num_groups = DIV_ROUND_UP(rcdu->num_crtcs, 2);
569 for (i = 0; i < num_groups; ++i) {
570 struct rcar_du_group *rgrp = &rcdu->groups[i];
572 mutex_init(&rgrp->lock);
575 rgrp->mmio_offset = mmio_offsets[i];
577 rgrp->num_crtcs = min(rcdu->num_crtcs - 2 * i, 2U);
579 /* If we have more than one CRTCs in this group pre-associate
580 * the low-order planes with CRTC 0 and the high-order planes
581 * with CRTC 1 to minimize flicker occurring when the
582 * association is changed.
584 rgrp->dptsr_planes = rgrp->num_crtcs > 1
585 ? (rcdu->info->gen >= 3 ? 0x04 : 0xf0)
588 if (!rcar_du_has(rcdu, RCAR_DU_FEATURE_VSP1_SOURCE)) {
589 ret = rcar_du_planes_init(rgrp);
595 /* Initialize the compositors. */
596 if (rcar_du_has(rcdu, RCAR_DU_FEATURE_VSP1_SOURCE)) {
597 for (i = 0; i < rcdu->num_crtcs; ++i) {
598 struct rcar_du_vsp *vsp = &rcdu->vsps[i];
602 rcdu->crtcs[i].vsp = vsp;
604 ret = rcar_du_vsp_init(vsp);
610 /* Create the CRTCs. */
611 for (i = 0; i < rcdu->num_crtcs; ++i) {
612 struct rcar_du_group *rgrp = &rcdu->groups[i / 2];
614 ret = rcar_du_crtc_create(rgrp, i);
619 /* Initialize the encoders. */
620 ret = rcar_du_lvdsenc_init(rcdu);
624 ret = rcar_du_encoders_init(rcdu);
629 dev_err(rcdu->dev, "error: no encoder could be initialized\n");
635 /* Set the possible CRTCs and possible clones. There's always at least
636 * one way for all encoders to clone each other, set all bits in the
637 * possible clones field.
639 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
640 struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
641 const struct rcar_du_output_routing *route =
642 &rcdu->info->routes[renc->output];
644 encoder->possible_crtcs = route->possible_crtcs;
645 encoder->possible_clones = (1 << num_encoders) - 1;
648 drm_mode_config_reset(dev);
650 drm_kms_helper_poll_init(dev);
652 if (dev->mode_config.num_connector) {
653 fbdev = drm_fbdev_cma_init(dev, 32, dev->mode_config.num_crtc,
654 dev->mode_config.num_connector);
656 return PTR_ERR(fbdev);
661 "no connector found, disabling fbdev emulation\n");