500 lines
12 KiB
C
500 lines
12 KiB
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 <linux/timer.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_fb.h"
|
|
#include "exynos_drm_plane.h"
|
|
#include "exynos_drm_vidi.h"
|
|
|
|
/* VIDI uses fixed refresh rate of 50Hz */
|
|
#define VIDI_REFRESH_TIME (1000 / 50)
|
|
|
|
/* vidi has totally three virtual windows. */
|
|
#define WINDOWS_NR 3
|
|
|
|
#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 int connected;
|
|
bool suspended;
|
|
struct timer_list timer;
|
|
struct mutex lock;
|
|
};
|
|
|
|
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 const enum drm_plane_type vidi_win_types[WINDOWS_NR] = {
|
|
DRM_PLANE_TYPE_PRIMARY,
|
|
DRM_PLANE_TYPE_OVERLAY,
|
|
DRM_PLANE_TYPE_CURSOR,
|
|
};
|
|
|
|
static int vidi_enable_vblank(struct exynos_drm_crtc *crtc)
|
|
{
|
|
struct vidi_context *ctx = crtc->ctx;
|
|
|
|
if (ctx->suspended)
|
|
return -EPERM;
|
|
|
|
mod_timer(&ctx->timer,
|
|
jiffies + msecs_to_jiffies(VIDI_REFRESH_TIME) - 1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void vidi_disable_vblank(struct exynos_drm_crtc *crtc)
|
|
{
|
|
}
|
|
|
|
static void vidi_update_plane(struct exynos_drm_crtc *crtc,
|
|
struct exynos_drm_plane *plane)
|
|
{
|
|
struct drm_plane_state *state = plane->base.state;
|
|
struct vidi_context *ctx = crtc->ctx;
|
|
dma_addr_t addr;
|
|
|
|
if (ctx->suspended)
|
|
return;
|
|
|
|
addr = exynos_drm_fb_dma_addr(state->fb, 0);
|
|
DRM_DEBUG_KMS("dma_addr = %pad\n", &addr);
|
|
}
|
|
|
|
static void vidi_enable(struct exynos_drm_crtc *crtc)
|
|
{
|
|
struct vidi_context *ctx = crtc->ctx;
|
|
|
|
mutex_lock(&ctx->lock);
|
|
|
|
ctx->suspended = false;
|
|
|
|
mutex_unlock(&ctx->lock);
|
|
|
|
drm_crtc_vblank_on(&crtc->base);
|
|
}
|
|
|
|
static void vidi_disable(struct exynos_drm_crtc *crtc)
|
|
{
|
|
struct vidi_context *ctx = crtc->ctx;
|
|
|
|
drm_crtc_vblank_off(&crtc->base);
|
|
|
|
mutex_lock(&ctx->lock);
|
|
|
|
ctx->suspended = true;
|
|
|
|
mutex_unlock(&ctx->lock);
|
|
}
|
|
|
|
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,
|
|
.atomic_flush = exynos_crtc_handle_event,
|
|
};
|
|
|
|
static void vidi_fake_vblank_timer(struct timer_list *t)
|
|
{
|
|
struct vidi_context *ctx = from_timer(ctx, t, timer);
|
|
|
|
if (drm_crtc_handle_vblank(&ctx->crtc->base))
|
|
mod_timer(&ctx->timer,
|
|
jiffies + msecs_to_jiffies(VIDI_REFRESH_TIME) - 1);
|
|
}
|
|
|
|
static ssize_t 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 ssize_t 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;
|
|
|
|
raw_edid = (struct edid *)(unsigned long)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 const struct drm_connector_funcs vidi_connector_funcs = {
|
|
.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 const struct drm_connector_helper_funcs vidi_connector_helper_funcs = {
|
|
.get_modes = vidi_get_modes,
|
|
};
|
|
|
|
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_mode_connector_attach_encoder(connector, encoder);
|
|
|
|
return 0;
|
|
}
|
|
|
|
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 const struct drm_encoder_helper_funcs exynos_vidi_encoder_helper_funcs = {
|
|
.mode_set = exynos_vidi_mode_set,
|
|
.enable = exynos_vidi_enable,
|
|
.disable = exynos_vidi_disable,
|
|
};
|
|
|
|
static const 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;
|
|
struct exynos_drm_plane_config plane_config = { 0 };
|
|
unsigned int i;
|
|
int ret;
|
|
|
|
ctx->drm_dev = drm_dev;
|
|
|
|
plane_config.pixel_formats = formats;
|
|
plane_config.num_pixel_formats = ARRAY_SIZE(formats);
|
|
|
|
for (i = 0; i < WINDOWS_NR; i++) {
|
|
plane_config.zpos = i;
|
|
plane_config.type = vidi_win_types[i];
|
|
|
|
ret = exynos_plane_init(drm_dev, &ctx->planes[i], i,
|
|
&plane_config);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
exynos_plane = &ctx->planes[DEFAULT_WIN];
|
|
ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
|
|
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);
|
|
}
|
|
|
|
drm_encoder_init(drm_dev, encoder, &exynos_vidi_encoder_funcs,
|
|
DRM_MODE_ENCODER_TMDS, NULL);
|
|
|
|
drm_encoder_helper_add(encoder, &exynos_vidi_encoder_helper_funcs);
|
|
|
|
ret = exynos_drm_set_possible_crtcs(encoder, EXYNOS_DISPLAY_TYPE_VIDI);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
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)
|
|
{
|
|
struct vidi_context *ctx = dev_get_drvdata(dev);
|
|
|
|
del_timer_sync(&ctx->timer);
|
|
}
|
|
|
|
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;
|
|
|
|
timer_setup(&ctx->timer, vidi_fake_vblank_timer, 0);
|
|
|
|
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,
|
|
},
|
|
};
|