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// SPDX-License-Identifier: GPL-2.0-or-later
/* exynos_drm_vidi.c
*
* Copyright (C) 2012 Samsung Electronics Co.Ltd
* Authors:
* Inki Dae <inki.dae@samsung.com>
*/
#include <linux/component.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/timer.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_edid.h>
#include <drm/drm_framebuffer.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_simple_kms_helper.h>
#include <drm/drm_vblank.h>
#include <drm/exynos_drm.h>
#include "exynos_drm_crtc.h"
#include "exynos_drm_drv.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 drm_device *drm_dev;
struct device *dev;
struct exynos_drm_crtc *crtc;
struct drm_connector connector;
struct exynos_drm_plane planes[WINDOWS_NR];
const struct drm_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_DEV_DEBUG_KMS(ctx->dev, "dma_addr = %pad\n", &addr);
}
static void vidi_atomic_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_atomic_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 = {
.atomic_enable = vidi_atomic_enable,
.atomic_disable = vidi_atomic_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 raw_edid is set then it can't be
* tested.
*/
if (ctx->raw_edid) {
DRM_DEV_DEBUG_KMS(dev, "edid data is not fake data.\n");
return -EINVAL;
}
DRM_DEV_DEBUG_KMS(dev, "requested connection.\n");
drm_helper_hpd_irq_event(ctx->drm_dev);
return len;
}
static DEVICE_ATTR(connection, 0644, vidi_show_connection,
vidi_store_connection);
static struct attribute *vidi_attrs[] = {
&dev_attr_connection.attr,
NULL,
};
ATTRIBUTE_GROUPS(vidi);
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_DEV_DEBUG_KMS(ctx->dev,
"user data for vidi is null.\n");
return -EINVAL;
}
if (vidi->connection > 1) {
DRM_DEV_DEBUG_KMS(ctx->dev,
"connection should be 0 or 1.\n");
return -EINVAL;
}
if (ctx->connected == vidi->connection) {
DRM_DEV_DEBUG_KMS(ctx->dev,
"same connection request.\n");
return -EINVAL;
}
if (vidi->connection) {
const struct drm_edid *drm_edid;
const struct edid *raw_edid;
size_t size;
raw_edid = (const struct edid *)(unsigned long)vidi->edid;
size = (raw_edid->extensions + 1) * EDID_LENGTH;
drm_edid = drm_edid_alloc(raw_edid, size);
if (!drm_edid)
return -ENOMEM;
if (!drm_edid_valid(drm_edid)) {
drm_edid_free(drm_edid);
DRM_DEV_DEBUG_KMS(ctx->dev,
"edid data is invalid.\n");
return -EINVAL;
}
ctx->raw_edid = drm_edid;
} else {
/* with connection = 0, free raw_edid */
drm_edid_free(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);
const struct drm_edid *drm_edid;
int count;
if (ctx->raw_edid)
drm_edid = drm_edid_dup(ctx->raw_edid);
else
drm_edid = drm_edid_alloc(fake_edid_info, sizeof(fake_edid_info));
if (!drm_edid)
return 0;
drm_edid_connector_update(connector, drm_edid);
count = drm_edid_connector_add_modes(connector);
drm_edid_free(drm_edid);
return count;
}
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_DEV_ERROR(ctx->dev,
"Failed to initialize connector with drm\n");
return ret;
}
drm_connector_helper_add(connector, &vidi_connector_helper_funcs);
drm_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 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_DEV_ERROR(dev, "failed to create crtc.\n");
return PTR_ERR(ctx->crtc);
}
drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_TMDS);
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_DEV_ERROR(dev, "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;
struct device *dev = &pdev->dev;
ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
ctx->dev = dev;
timer_setup(&ctx->timer, vidi_fake_vblank_timer, 0);
mutex_init(&ctx->lock);
platform_set_drvdata(pdev, ctx);
return component_add(dev, &vidi_component_ops);
}
static void vidi_remove(struct platform_device *pdev)
{
struct vidi_context *ctx = platform_get_drvdata(pdev);
drm_edid_free(ctx->raw_edid);
ctx->raw_edid = NULL;
component_del(&pdev->dev, &vidi_component_ops);
}
struct platform_driver vidi_driver = {
.probe = vidi_probe,
.remove = vidi_remove,
.driver = {
.name = "exynos-drm-vidi",
.dev_groups = vidi_groups,
},
};
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