linux_dsm_epyc7002/drivers/gpu/drm/exynos/exynos_drm_vidi.c
Andrzej Hajda 8574e927b4 drm/exynos/vidi: use timer for vblanks instead of sleeping worker
VIDI driver uses fake vblank handler to generate vblank events.
It was implemented using worker which slept for vblank time, additionally
it did not work if there were no page flips. The patch replaces it with
timer, uses drm_crtc_vblank_(on|off) helpers to manage it and fixes
behavior for non-page-flip cases.
This change allows further improvements of vblank in exynos-drm framework.

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
2016-10-01 00:39:35 +09:00

532 lines
13 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;
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 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 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_timer(unsigned long arg)
{
struct vidi_context *ctx = (void *)arg;
int win;
if (ctx->pipe < 0)
return;
if (drm_crtc_handle_vblank(&ctx->crtc->base))
mod_timer(&ctx->timer,
jiffies + msecs_to_jiffies(VIDI_REFRESH_TIME) - 1);
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 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 = {
.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 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_connector_register(connector);
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 pipe, ret;
vidi_ctx_initialize(ctx, 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,
1 << ctx->pipe, &plane_config);
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, NULL);
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)
{
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;
setup_timer(&ctx->timer, vidi_fake_vblank_timer, (unsigned long)ctx);
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,
},
};