/* * rcar_du_kms.c -- R-Car Display Unit Mode Setting * * Copyright (C) 2013-2015 Renesas Electronics Corporation * * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com) * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ #include #include #include #include #include #include #include #include #include #include "rcar_du_crtc.h" #include "rcar_du_drv.h" #include "rcar_du_encoder.h" #include "rcar_du_kms.h" #include "rcar_du_lvdsenc.h" #include "rcar_du_regs.h" #include "rcar_du_vsp.h" /* ----------------------------------------------------------------------------- * Format helpers */ static const struct rcar_du_format_info rcar_du_format_infos[] = { { .fourcc = DRM_FORMAT_RGB565, .bpp = 16, .planes = 1, .pnmr = PnMR_SPIM_TP | PnMR_DDDF_16BPP, .edf = PnDDCR4_EDF_NONE, }, { .fourcc = DRM_FORMAT_ARGB1555, .bpp = 16, .planes = 1, .pnmr = PnMR_SPIM_ALP | PnMR_DDDF_ARGB, .edf = PnDDCR4_EDF_NONE, }, { .fourcc = DRM_FORMAT_XRGB1555, .bpp = 16, .planes = 1, .pnmr = PnMR_SPIM_ALP | PnMR_DDDF_ARGB, .edf = PnDDCR4_EDF_NONE, }, { .fourcc = DRM_FORMAT_XRGB8888, .bpp = 32, .planes = 1, .pnmr = PnMR_SPIM_TP | PnMR_DDDF_16BPP, .edf = PnDDCR4_EDF_RGB888, }, { .fourcc = DRM_FORMAT_ARGB8888, .bpp = 32, .planes = 1, .pnmr = PnMR_SPIM_ALP | PnMR_DDDF_16BPP, .edf = PnDDCR4_EDF_ARGB8888, }, { .fourcc = DRM_FORMAT_UYVY, .bpp = 16, .planes = 1, .pnmr = PnMR_SPIM_TP_OFF | PnMR_DDDF_YC, .edf = PnDDCR4_EDF_NONE, }, { .fourcc = DRM_FORMAT_YUYV, .bpp = 16, .planes = 1, .pnmr = PnMR_SPIM_TP_OFF | PnMR_DDDF_YC, .edf = PnDDCR4_EDF_NONE, }, { .fourcc = DRM_FORMAT_NV12, .bpp = 12, .planes = 2, .pnmr = PnMR_SPIM_TP_OFF | PnMR_DDDF_YC, .edf = PnDDCR4_EDF_NONE, }, { .fourcc = DRM_FORMAT_NV21, .bpp = 12, .planes = 2, .pnmr = PnMR_SPIM_TP_OFF | PnMR_DDDF_YC, .edf = PnDDCR4_EDF_NONE, }, { .fourcc = DRM_FORMAT_NV16, .bpp = 16, .planes = 2, .pnmr = PnMR_SPIM_TP_OFF | PnMR_DDDF_YC, .edf = PnDDCR4_EDF_NONE, }, /* The following formats are not supported on Gen2 and thus have no * associated .pnmr or .edf settings. */ { .fourcc = DRM_FORMAT_NV61, .bpp = 16, .planes = 2, }, { .fourcc = DRM_FORMAT_YUV420, .bpp = 12, .planes = 3, }, { .fourcc = DRM_FORMAT_YVU420, .bpp = 12, .planes = 3, }, { .fourcc = DRM_FORMAT_YUV422, .bpp = 16, .planes = 3, }, { .fourcc = DRM_FORMAT_YVU422, .bpp = 16, .planes = 3, }, { .fourcc = DRM_FORMAT_YUV444, .bpp = 24, .planes = 3, }, { .fourcc = DRM_FORMAT_YVU444, .bpp = 24, .planes = 3, }, }; const struct rcar_du_format_info *rcar_du_format_info(u32 fourcc) { unsigned int i; for (i = 0; i < ARRAY_SIZE(rcar_du_format_infos); ++i) { if (rcar_du_format_infos[i].fourcc == fourcc) return &rcar_du_format_infos[i]; } return NULL; } /* ----------------------------------------------------------------------------- * Frame buffer */ int rcar_du_dumb_create(struct drm_file *file, struct drm_device *dev, struct drm_mode_create_dumb *args) { struct rcar_du_device *rcdu = dev->dev_private; unsigned int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8); unsigned int align; /* The R8A7779 DU requires a 16 pixels pitch alignment as documented, * but the R8A7790 DU seems to require a 128 bytes pitch alignment. */ if (rcar_du_needs(rcdu, RCAR_DU_QUIRK_ALIGN_128B)) align = 128; else align = 16 * args->bpp / 8; args->pitch = roundup(min_pitch, align); return drm_gem_cma_dumb_create_internal(file, dev, args); } static struct drm_framebuffer * rcar_du_fb_create(struct drm_device *dev, struct drm_file *file_priv, const struct drm_mode_fb_cmd2 *mode_cmd) { struct rcar_du_device *rcdu = dev->dev_private; const struct rcar_du_format_info *format; unsigned int max_pitch; unsigned int align; unsigned int bpp; unsigned int i; format = rcar_du_format_info(mode_cmd->pixel_format); if (format == NULL) { dev_dbg(dev->dev, "unsupported pixel format %08x\n", mode_cmd->pixel_format); return ERR_PTR(-EINVAL); } /* * The pitch and alignment constraints are expressed in pixels on the * hardware side and in bytes in the DRM API. */ bpp = format->planes == 1 ? format->bpp / 8 : 1; max_pitch = 4096 * bpp; if (rcar_du_needs(rcdu, RCAR_DU_QUIRK_ALIGN_128B)) align = 128; else align = 16 * bpp; if (mode_cmd->pitches[0] & (align - 1) || mode_cmd->pitches[0] >= max_pitch) { dev_dbg(dev->dev, "invalid pitch value %u\n", mode_cmd->pitches[0]); return ERR_PTR(-EINVAL); } for (i = 1; i < format->planes; ++i) { if (mode_cmd->pitches[i] != mode_cmd->pitches[0]) { dev_dbg(dev->dev, "luma and chroma pitches do not match\n"); return ERR_PTR(-EINVAL); } } return drm_fb_cma_create(dev, file_priv, mode_cmd); } static void rcar_du_output_poll_changed(struct drm_device *dev) { struct rcar_du_device *rcdu = dev->dev_private; drm_fbdev_cma_hotplug_event(rcdu->fbdev); } /* ----------------------------------------------------------------------------- * Atomic Check and Update */ static int rcar_du_atomic_check(struct drm_device *dev, struct drm_atomic_state *state) { struct rcar_du_device *rcdu = dev->dev_private; int ret; ret = drm_atomic_helper_check(dev, state); if (ret < 0) return ret; if (rcar_du_has(rcdu, RCAR_DU_FEATURE_VSP1_SOURCE)) return 0; return rcar_du_atomic_check_planes(dev, state); } struct rcar_du_commit { struct work_struct work; struct drm_device *dev; struct drm_atomic_state *state; u32 crtcs; }; static void rcar_du_atomic_complete(struct rcar_du_commit *commit) { struct drm_device *dev = commit->dev; struct rcar_du_device *rcdu = dev->dev_private; struct drm_atomic_state *old_state = commit->state; /* Apply the atomic update. */ drm_atomic_helper_commit_modeset_disables(dev, old_state); drm_atomic_helper_commit_modeset_enables(dev, old_state); drm_atomic_helper_commit_planes(dev, old_state, true); drm_atomic_helper_wait_for_vblanks(dev, old_state); drm_atomic_helper_cleanup_planes(dev, old_state); drm_atomic_state_free(old_state); /* Complete the commit, wake up any waiter. */ spin_lock(&rcdu->commit.wait.lock); rcdu->commit.pending &= ~commit->crtcs; wake_up_all_locked(&rcdu->commit.wait); spin_unlock(&rcdu->commit.wait.lock); kfree(commit); } static void rcar_du_atomic_work(struct work_struct *work) { struct rcar_du_commit *commit = container_of(work, struct rcar_du_commit, work); rcar_du_atomic_complete(commit); } static int rcar_du_atomic_commit(struct drm_device *dev, struct drm_atomic_state *state, bool nonblock) { struct rcar_du_device *rcdu = dev->dev_private; struct rcar_du_commit *commit; struct drm_crtc *crtc; struct drm_crtc_state *crtc_state; unsigned int i; int ret; ret = drm_atomic_helper_prepare_planes(dev, state); if (ret) return ret; /* Allocate the commit object. */ commit = kzalloc(sizeof(*commit), GFP_KERNEL); if (commit == NULL) { ret = -ENOMEM; goto error; } INIT_WORK(&commit->work, rcar_du_atomic_work); commit->dev = dev; commit->state = state; /* Wait until all affected CRTCs have completed previous commits and * mark them as pending. */ for_each_crtc_in_state(state, crtc, crtc_state, i) commit->crtcs |= drm_crtc_mask(crtc); spin_lock(&rcdu->commit.wait.lock); ret = wait_event_interruptible_locked(rcdu->commit.wait, !(rcdu->commit.pending & commit->crtcs)); if (ret == 0) rcdu->commit.pending |= commit->crtcs; spin_unlock(&rcdu->commit.wait.lock); if (ret) { kfree(commit); goto error; } /* Swap the state, this is the point of no return. */ drm_atomic_helper_swap_state(state, true); if (nonblock) schedule_work(&commit->work); else rcar_du_atomic_complete(commit); return 0; error: drm_atomic_helper_cleanup_planes(dev, state); return ret; } /* ----------------------------------------------------------------------------- * Initialization */ static const struct drm_mode_config_funcs rcar_du_mode_config_funcs = { .fb_create = rcar_du_fb_create, .output_poll_changed = rcar_du_output_poll_changed, .atomic_check = rcar_du_atomic_check, .atomic_commit = rcar_du_atomic_commit, }; static int rcar_du_encoders_init_one(struct rcar_du_device *rcdu, enum rcar_du_output output, struct of_endpoint *ep) { static const struct { const char *compatible; enum rcar_du_encoder_type type; } encoders[] = { { "adi,adv7123", RCAR_DU_ENCODER_VGA }, { "adi,adv7511w", RCAR_DU_ENCODER_HDMI }, { "thine,thc63lvdm83d", RCAR_DU_ENCODER_LVDS }, }; enum rcar_du_encoder_type enc_type = RCAR_DU_ENCODER_NONE; struct device_node *connector = NULL; struct device_node *encoder = NULL; struct device_node *ep_node = NULL; struct device_node *entity_ep_node; struct device_node *entity; int ret; /* * Locate the connected entity and infer its type from the number of * endpoints. */ entity = of_graph_get_remote_port_parent(ep->local_node); if (!entity) { dev_dbg(rcdu->dev, "unconnected endpoint %s, skipping\n", ep->local_node->full_name); return -ENODEV; } entity_ep_node = of_parse_phandle(ep->local_node, "remote-endpoint", 0); for_each_endpoint_of_node(entity, ep_node) { if (ep_node == entity_ep_node) continue; /* * We've found one endpoint other than the input, this must * be an encoder. Locate the connector. */ encoder = entity; connector = of_graph_get_remote_port_parent(ep_node); of_node_put(ep_node); if (!connector) { dev_warn(rcdu->dev, "no connector for encoder %s, skipping\n", encoder->full_name); of_node_put(entity_ep_node); of_node_put(encoder); return -ENODEV; } break; } of_node_put(entity_ep_node); if (encoder) { /* * If an encoder has been found, get its type based on its * compatible string. */ unsigned int i; for (i = 0; i < ARRAY_SIZE(encoders); ++i) { if (of_device_is_compatible(encoder, encoders[i].compatible)) { enc_type = encoders[i].type; break; } } if (i == ARRAY_SIZE(encoders)) { dev_warn(rcdu->dev, "unknown encoder type for %s, skipping\n", encoder->full_name); of_node_put(encoder); of_node_put(connector); return -EINVAL; } } else { /* * If no encoder has been found the entity must be the * connector. */ connector = entity; } ret = rcar_du_encoder_init(rcdu, enc_type, output, encoder, connector); of_node_put(encoder); of_node_put(connector); if (ret && ret != -EPROBE_DEFER) dev_warn(rcdu->dev, "failed to initialize encoder %s (%d), skipping\n", encoder->full_name, ret); return ret; } static int rcar_du_encoders_init(struct rcar_du_device *rcdu) { struct device_node *np = rcdu->dev->of_node; struct device_node *ep_node; unsigned int num_encoders = 0; /* * Iterate over the endpoints and create one encoder for each output * pipeline. */ for_each_endpoint_of_node(np, ep_node) { enum rcar_du_output output; struct of_endpoint ep; unsigned int i; int ret; ret = of_graph_parse_endpoint(ep_node, &ep); if (ret < 0) { of_node_put(ep_node); return ret; } /* Find the output route corresponding to the port number. */ for (i = 0; i < RCAR_DU_OUTPUT_MAX; ++i) { if (rcdu->info->routes[i].possible_crtcs && rcdu->info->routes[i].port == ep.port) { output = i; break; } } if (i == RCAR_DU_OUTPUT_MAX) { dev_warn(rcdu->dev, "port %u references unexisting output, skipping\n", ep.port); continue; } /* Process the output pipeline. */ ret = rcar_du_encoders_init_one(rcdu, output, &ep); if (ret < 0) { if (ret == -EPROBE_DEFER) { of_node_put(ep_node); return ret; } continue; } num_encoders++; } return num_encoders; } static int rcar_du_properties_init(struct rcar_du_device *rcdu) { rcdu->props.alpha = drm_property_create_range(rcdu->ddev, 0, "alpha", 0, 255); if (rcdu->props.alpha == NULL) return -ENOMEM; /* The color key is expressed as an RGB888 triplet stored in a 32-bit * integer in XRGB8888 format. Bit 24 is used as a flag to disable (0) * or enable source color keying (1). */ rcdu->props.colorkey = drm_property_create_range(rcdu->ddev, 0, "colorkey", 0, 0x01ffffff); if (rcdu->props.colorkey == NULL) return -ENOMEM; return 0; } int rcar_du_modeset_init(struct rcar_du_device *rcdu) { static const unsigned int mmio_offsets[] = { DU0_REG_OFFSET, DU2_REG_OFFSET }; struct drm_device *dev = rcdu->ddev; struct drm_encoder *encoder; struct drm_fbdev_cma *fbdev; unsigned int num_encoders; unsigned int num_groups; unsigned int i; int ret; drm_mode_config_init(dev); dev->mode_config.min_width = 0; dev->mode_config.min_height = 0; dev->mode_config.max_width = 4095; dev->mode_config.max_height = 2047; dev->mode_config.funcs = &rcar_du_mode_config_funcs; rcdu->num_crtcs = rcdu->info->num_crtcs; ret = rcar_du_properties_init(rcdu); if (ret < 0) return ret; /* Initialize the groups. */ num_groups = DIV_ROUND_UP(rcdu->num_crtcs, 2); for (i = 0; i < num_groups; ++i) { struct rcar_du_group *rgrp = &rcdu->groups[i]; mutex_init(&rgrp->lock); rgrp->dev = rcdu; rgrp->mmio_offset = mmio_offsets[i]; rgrp->index = i; rgrp->num_crtcs = min(rcdu->num_crtcs - 2 * i, 2U); /* If we have more than one CRTCs in this group pre-associate * the low-order planes with CRTC 0 and the high-order planes * with CRTC 1 to minimize flicker occurring when the * association is changed. */ rgrp->dptsr_planes = rgrp->num_crtcs > 1 ? (rcdu->info->gen >= 3 ? 0x04 : 0xf0) : 0; if (!rcar_du_has(rcdu, RCAR_DU_FEATURE_VSP1_SOURCE)) { ret = rcar_du_planes_init(rgrp); if (ret < 0) return ret; } } /* Initialize the compositors. */ if (rcar_du_has(rcdu, RCAR_DU_FEATURE_VSP1_SOURCE)) { for (i = 0; i < rcdu->num_crtcs; ++i) { struct rcar_du_vsp *vsp = &rcdu->vsps[i]; vsp->index = i; vsp->dev = rcdu; rcdu->crtcs[i].vsp = vsp; ret = rcar_du_vsp_init(vsp); if (ret < 0) return ret; } } /* Create the CRTCs. */ for (i = 0; i < rcdu->num_crtcs; ++i) { struct rcar_du_group *rgrp = &rcdu->groups[i / 2]; ret = rcar_du_crtc_create(rgrp, i); if (ret < 0) return ret; } /* Initialize the encoders. */ ret = rcar_du_lvdsenc_init(rcdu); if (ret < 0) return ret; ret = rcar_du_encoders_init(rcdu); if (ret < 0) return ret; if (ret == 0) { dev_err(rcdu->dev, "error: no encoder could be initialized\n"); return -EINVAL; } num_encoders = ret; /* Set the possible CRTCs and possible clones. There's always at least * one way for all encoders to clone each other, set all bits in the * possible clones field. */ list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { struct rcar_du_encoder *renc = to_rcar_encoder(encoder); const struct rcar_du_output_routing *route = &rcdu->info->routes[renc->output]; encoder->possible_crtcs = route->possible_crtcs; encoder->possible_clones = (1 << num_encoders) - 1; } drm_mode_config_reset(dev); drm_kms_helper_poll_init(dev); if (dev->mode_config.num_connector) { fbdev = drm_fbdev_cma_init(dev, 32, dev->mode_config.num_crtc, dev->mode_config.num_connector); if (IS_ERR(fbdev)) return PTR_ERR(fbdev); rcdu->fbdev = fbdev; } else { dev_info(rcdu->dev, "no connector found, disabling fbdev emulation\n"); } return 0; }