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OpenCloudOS-Kernel/drivers/gpu/drm/rcar-du/rcar_du_kms.c

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/*
* 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 <drm/drmP.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <linux/of_graph.h>
#include <linux/wait.h>
#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;
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 (i = 0; i < dev->mode_config.num_crtc; ++i) {
if (state->crtcs[i])
commit->crtcs |= 1 << drm_crtc_index(state->crtcs[i]);
}
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(dev, state);
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;
rcdu->props.zpos =
drm_property_create_range(rcdu->ddev, 0, "zpos", 1, 7);
if (rcdu->props.zpos == 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;
}
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