- 根目录:
- drivers
- gpu
- drm
- exynos
- exynos_drm_vidi.c
/* exynos_drm_vidi.c
*
* Copyright (C) 2012 Samsung Electronics Co.Ltd
* Authors:
* Inki Dae <inki.dae@samsung.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 <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/component.h>
#include <drm/exynos_drm.h>
#include <drm/drm_edid.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_atomic_helper.h>
#include "exynos_drm_drv.h"
#include "exynos_drm_crtc.h"
#include "exynos_drm_plane.h"
#include "exynos_drm_vidi.h"
/* vidi has totally three virtual windows. */
#define WINDOWS_NR 3
#define CURSOR_WIN 2
#define ctx_from_connector(c) container_of(c, struct vidi_context, \
connector)
struct vidi_context {
struct drm_encoder encoder;
struct platform_device *pdev;
struct drm_device *drm_dev;
struct exynos_drm_crtc *crtc;
struct drm_connector connector;
struct exynos_drm_plane planes[WINDOWS_NR];
struct edid *raw_edid;
unsigned int clkdiv;
unsigned long irq_flags;
unsigned int connected;
bool vblank_on;
bool suspended;
bool direct_vblank;
struct work_struct work;
struct mutex lock;
int pipe;
};
static inline struct vidi_context *encoder_to_vidi(struct drm_encoder *e)
{
return container_of(e, struct vidi_context, encoder);
}
static const char fake_edid_info[] = {
0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x06
};
static const uint32_t formats[] = {
DRM_FORMAT_XRGB8888,
DRM_FORMAT_ARGB8888,
DRM_FORMAT_NV12,
};
static int vidi_enable_vblank(struct exynos_drm_crtc *crtc)
{
struct vidi_context *ctx = crtc->ctx;
if (ctx->suspended)
return -EPERM;
if (!test_and_set_bit(0, &ctx->irq_flags))
ctx->vblank_on = true;
ctx->direct_vblank = true;
/*
* in case of page flip request, vidi_finish_pageflip function
* will not be called because direct_vblank is true and then
* that function will be called by crtc_ops->update_plane callback
*/
schedule_work(&ctx->work);
return 0;
}
static void vidi_disable_vblank(struct exynos_drm_crtc *crtc)
{
struct vidi_context *ctx = crtc->ctx;
if (ctx->suspended)
return;
if (test_and_clear_bit(0, &ctx->irq_flags))
ctx->vblank_on = false;
}
static void vidi_update_plane(struct exynos_drm_crtc *crtc,
struct exynos_drm_plane *plane)
{
struct vidi_context *ctx = crtc->ctx;
if (ctx->suspended)
return;
DRM_DEBUG_KMS("dma_addr = %pad\n", plane->dma_addr);
if (ctx->vblank_on)
schedule_work(&ctx->work);
}
static void vidi_enable(struct exynos_drm_crtc *crtc)
{
struct vidi_context *ctx = crtc->ctx;
mutex_lock(&ctx->lock);
ctx->suspended = false;
/* if vblank was enabled status, enable it again. */
if (test_and_clear_bit(0, &ctx->irq_flags))
vidi_enable_vblank(ctx->crtc);
mutex_unlock(&ctx->lock);
}
static void vidi_disable(struct exynos_drm_crtc *crtc)
{
struct vidi_context *ctx = crtc->ctx;
mutex_lock(&ctx->lock);
ctx->suspended = true;
mutex_unlock(&ctx->lock);
}
static int vidi_ctx_initialize(struct vidi_context *ctx,
struct drm_device *drm_dev)
{
struct exynos_drm_private *priv = drm_dev->dev_private;
ctx->drm_dev = drm_dev;
ctx->pipe = priv->pipe++;
return 0;
}
static const struct exynos_drm_crtc_ops vidi_crtc_ops = {
.enable = vidi_enable,
.disable = vidi_disable,
.enable_vblank = vidi_enable_vblank,
.disable_vblank = vidi_disable_vblank,
.update_plane = vidi_update_plane,
};
static void vidi_fake_vblank_handler(struct work_struct *work)
{
struct vidi_context *ctx = container_of(work, struct vidi_context,
work);
int win;
if (ctx->pipe < 0)
return;
/* refresh rate is about 50Hz. */
usleep_range(16000, 20000);
mutex_lock(&ctx->lock);
if (ctx->direct_vblank) {
drm_crtc_handle_vblank(&ctx->crtc->base);
ctx->direct_vblank = false;
mutex_unlock(&ctx->lock);
return;
}
mutex_unlock(&ctx->lock);
for (win = 0 ; win < WINDOWS_NR ; win++) {
struct exynos_drm_plane *plane = &ctx->planes[win];
if (!plane->pending_fb)
continue;
exynos_drm_crtc_finish_update(ctx->crtc, plane);
}
}
static int vidi_show_connection(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct vidi_context *ctx = dev_get_drvdata(dev);
int rc;
mutex_lock(&ctx->lock);
rc = sprintf(buf, "%d\n", ctx->connected);
mutex_unlock(&ctx->lock);
return rc;
}
static int vidi_store_connection(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len)
{
struct vidi_context *ctx = dev_get_drvdata(dev);
int ret;
ret = kstrtoint(buf, 0, &ctx->connected);
if (ret)
return ret;
if (ctx->connected > 1)
return -EINVAL;
/* use fake edid data for test. */
if (!ctx->raw_edid)
ctx->raw_edid = (struct edid *)fake_edid_info;
/* if raw_edid isn't same as fake data then it can't be tested. */
if (ctx->raw_edid != (struct edid *)fake_edid_info) {
DRM_DEBUG_KMS("edid data is not fake data.\n");
return -EINVAL;
}
DRM_DEBUG_KMS("requested connection.\n");
drm_helper_hpd_irq_event(ctx->drm_dev);
return len;
}
static DEVICE_ATTR(connection, 0644, vidi_show_connection,
vidi_store_connection);
int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
struct drm_file *file_priv)
{
struct vidi_context *ctx = dev_get_drvdata(drm_dev->dev);
struct drm_exynos_vidi_connection *vidi = data;
if (!vidi) {
DRM_DEBUG_KMS("user data for vidi is null.\n");
return -EINVAL;
}
if (vidi->connection > 1) {
DRM_DEBUG_KMS("connection should be 0 or 1.\n");
return -EINVAL;
}
if (ctx->connected == vidi->connection) {
DRM_DEBUG_KMS("same connection request.\n");
return -EINVAL;
}
if (vidi->connection) {
struct edid *raw_edid = (struct edid *)(uint32_t)vidi->edid;
if (!drm_edid_is_valid(raw_edid)) {
DRM_DEBUG_KMS("edid data is invalid.\n");
return -EINVAL;
}
ctx->raw_edid = drm_edid_duplicate(raw_edid);
if (!ctx->raw_edid) {
DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
return -ENOMEM;
}
} else {
/*
* with connection = 0, free raw_edid
* only if raw edid data isn't same as fake data.
*/
if (ctx->raw_edid && ctx->raw_edid !=
(struct edid *)fake_edid_info) {
kfree(ctx->raw_edid);
ctx->raw_edid = NULL;
}
}
ctx->connected = vidi->connection;
drm_helper_hpd_irq_event(ctx->drm_dev);
return 0;
}
static enum drm_connector_status vidi_detect(struct drm_connector *connector,
bool force)
{
struct vidi_context *ctx = ctx_from_connector(connector);
/*
* connection request would come from user side
* to do hotplug through specific ioctl.
*/
return ctx->connected ? connector_status_connected :
connector_status_disconnected;
}
static void vidi_connector_destroy(struct drm_connector *connector)
{
}
static struct drm_connector_funcs vidi_connector_funcs = {
.dpms = drm_atomic_helper_connector_dpms,
.fill_modes = drm_helper_probe_single_connector_modes,
.detect = vidi_detect,
.destroy = vidi_connector_destroy,
.reset = drm_atomic_helper_connector_reset,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
static int vidi_get_modes(struct drm_connector *connector)
{
struct vidi_context *ctx = ctx_from_connector(connector);
struct edid *edid;
int edid_len;
/*
* the edid data comes from user side and it would be set
* to ctx->raw_edid through specific ioctl.
*/
if (!ctx->raw_edid) {
DRM_DEBUG_KMS("raw_edid is null.\n");
return -EFAULT;
}
edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH;
edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL);
if (!edid) {
DRM_DEBUG_KMS("failed to allocate edid\n");
return -ENOMEM;
}
drm_mode_connector_update_edid_property(connector, edid);
return drm_add_edid_modes(connector, edid);
}
static struct drm_encoder *vidi_best_encoder(struct drm_connector *connector)
{
struct vidi_context *ctx = ctx_from_connector(connector);
return &ctx->encoder;
}
static struct drm_connector_helper_funcs vidi_connector_helper_funcs = {
.get_modes = vidi_get_modes,
.best_encoder = vidi_best_encoder,
};
static int vidi_create_connector(struct drm_encoder *encoder)
{
struct vidi_context *ctx = encoder_to_vidi(encoder);
struct drm_connector *connector = &ctx->connector;
int ret;
connector->polled = DRM_CONNECTOR_POLL_HPD;
ret = drm_connector_init(ctx->drm_dev, connector,
&vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
if (ret) {
DRM_ERROR("Failed to initialize connector with drm\n");
return ret;
}
drm_connector_helper_add(connector, &vidi_connector_helper_funcs);
drm_connector_register(connector);
drm_mode_connector_attach_encoder(connector, encoder);
return 0;
}
static bool exynos_vidi_mode_fixup(struct drm_encoder *encoder,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
return true;
}
static void exynos_vidi_mode_set(struct drm_encoder *encoder,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
}
static void exynos_vidi_enable(struct drm_encoder *encoder)
{
}
static void exynos_vidi_disable(struct drm_encoder *encoder)
{
}
static struct drm_encoder_helper_funcs exynos_vidi_encoder_helper_funcs = {
.mode_fixup = exynos_vidi_mode_fixup,
.mode_set = exynos_vidi_mode_set,
.enable = exynos_vidi_enable,
.disable = exynos_vidi_disable,
};
static struct drm_encoder_funcs exynos_vidi_encoder_funcs = {
.destroy = drm_encoder_cleanup,
};
static int vidi_bind(struct device *dev, struct device *master, void *data)
{
struct vidi_context *ctx = dev_get_drvdata(dev);
struct drm_device *drm_dev = data;
struct drm_encoder *encoder = &ctx->encoder;
struct exynos_drm_plane *exynos_plane;
enum drm_plane_type type;
unsigned int zpos;
int pipe, ret;
vidi_ctx_initialize(ctx, drm_dev);
for (zpos = 0; zpos < WINDOWS_NR; zpos++) {
type = exynos_plane_get_type(zpos, CURSOR_WIN);
ret = exynos_plane_init(drm_dev, &ctx->planes[zpos],
1 << ctx->pipe, type, formats,
ARRAY_SIZE(formats), zpos);
if (ret)
return ret;
}
exynos_plane = &ctx->planes[DEFAULT_WIN];
ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
ctx->pipe, EXYNOS_DISPLAY_TYPE_VIDI,
&vidi_crtc_ops, ctx);
if (IS_ERR(ctx->crtc)) {
DRM_ERROR("failed to create crtc.\n");
return PTR_ERR(ctx->crtc);
}
pipe = exynos_drm_crtc_get_pipe_from_type(drm_dev,
EXYNOS_DISPLAY_TYPE_VIDI);
if (pipe < 0)
return pipe;
encoder->possible_crtcs = 1 << pipe;
DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
drm_encoder_init(drm_dev, encoder, &exynos_vidi_encoder_funcs,
DRM_MODE_ENCODER_TMDS);
drm_encoder_helper_add(encoder, &exynos_vidi_encoder_helper_funcs);
ret = vidi_create_connector(encoder);
if (ret) {
DRM_ERROR("failed to create connector ret = %d\n", ret);
drm_encoder_cleanup(encoder);
return ret;
}
return 0;
}
static void vidi_unbind(struct device *dev, struct device *master, void *data)
{
}
static const struct component_ops vidi_component_ops = {
.bind = vidi_bind,
.unbind = vidi_unbind,
};
static int vidi_probe(struct platform_device *pdev)
{
struct vidi_context *ctx;
int ret;
ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
ctx->pdev = pdev;
INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
mutex_init(&ctx->lock);
platform_set_drvdata(pdev, ctx);
ret = device_create_file(&pdev->dev, &dev_attr_connection);
if (ret < 0) {
DRM_ERROR("failed to create connection sysfs.\n");
return ret;
}
ret = component_add(&pdev->dev, &vidi_component_ops);
if (ret)
goto err_remove_file;
return ret;
err_remove_file:
device_remove_file(&pdev->dev, &dev_attr_connection);
return ret;
}
static int vidi_remove(struct platform_device *pdev)
{
struct vidi_context *ctx = platform_get_drvdata(pdev);
if (ctx->raw_edid != (struct edid *)fake_edid_info) {
kfree(ctx->raw_edid);
ctx->raw_edid = NULL;
return -EINVAL;
}
component_del(&pdev->dev, &vidi_component_ops);
return 0;
}
struct platform_driver vidi_driver = {
.probe = vidi_probe,
.remove = vidi_remove,
.driver = {
.name = "exynos-drm-vidi",
.owner = THIS_MODULE,
},
};