- 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 <drm/exynos_drm.h>
#include <drm/drm_edid.h>
#include <drm/drm_crtc_helper.h>
#include "exynos_drm_drv.h"
#include "exynos_drm_crtc.h"
#include "exynos_drm_encoder.h"
#include "exynos_drm_vidi.h"
/* vidi has totally three virtual windows. */
#define WINDOWS_NR 3
#define get_vidi_context(dev) platform_get_drvdata(to_platform_device(dev))
struct vidi_win_data {
unsigned int offset_x;
unsigned int offset_y;
unsigned int ovl_width;
unsigned int ovl_height;
unsigned int fb_width;
unsigned int fb_height;
unsigned int bpp;
dma_addr_t dma_addr;
unsigned int buf_offsize;
unsigned int line_size; /* bytes */
bool enabled;
};
struct vidi_context {
struct exynos_drm_subdrv subdrv;
struct drm_crtc *crtc;
struct vidi_win_data win_data[WINDOWS_NR];
struct edid *raw_edid;
unsigned int clkdiv;
unsigned int default_win;
unsigned long irq_flags;
unsigned int connected;
bool vblank_on;
bool suspended;
bool direct_vblank;
struct work_struct work;
struct mutex lock;
};
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 bool vidi_display_is_connected(struct device *dev)
{
struct vidi_context *ctx = get_vidi_context(dev);
/*
* connection request would come from user side
* to do hotplug through specific ioctl.
*/
return ctx->connected ? true : false;
}
static struct edid *vidi_get_edid(struct device *dev,
struct drm_connector *connector)
{
struct vidi_context *ctx = get_vidi_context(dev);
struct edid *edid;
/*
* 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 ERR_PTR(-EFAULT);
}
edid = drm_edid_duplicate(ctx->raw_edid);
if (!edid) {
DRM_DEBUG_KMS("failed to allocate edid\n");
return ERR_PTR(-ENOMEM);
}
return edid;
}
static void *vidi_get_panel(struct device *dev)
{
/* TODO. */
return NULL;
}
static int vidi_check_mode(struct device *dev, struct drm_display_mode *mode)
{
/* TODO. */
return 0;
}
static int vidi_display_power_on(struct device *dev, int mode)
{
/* TODO */
return 0;
}
static struct exynos_drm_display_ops vidi_display_ops = {
.type = EXYNOS_DISPLAY_TYPE_VIDI,
.is_connected = vidi_display_is_connected,
.get_edid = vidi_get_edid,
.get_panel = vidi_get_panel,
.check_mode = vidi_check_mode,
.power_on = vidi_display_power_on,
};
static void vidi_dpms(struct device *subdrv_dev, int mode)
{
struct vidi_context *ctx = get_vidi_context(subdrv_dev);
DRM_DEBUG_KMS("%d\n", mode);
mutex_lock(&ctx->lock);
switch (mode) {
case DRM_MODE_DPMS_ON:
/* TODO. */
break;
case DRM_MODE_DPMS_STANDBY:
case DRM_MODE_DPMS_SUSPEND:
case DRM_MODE_DPMS_OFF:
/* TODO. */
break;
default:
DRM_DEBUG_KMS("unspecified mode %d\n", mode);
break;
}
mutex_unlock(&ctx->lock);
}
static void vidi_apply(struct device *subdrv_dev)
{
struct vidi_context *ctx = get_vidi_context(subdrv_dev);
struct exynos_drm_manager *mgr = ctx->subdrv.manager;
struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
struct exynos_drm_overlay_ops *ovl_ops = mgr->overlay_ops;
struct vidi_win_data *win_data;
int i;
for (i = 0; i < WINDOWS_NR; i++) {
win_data = &ctx->win_data[i];
if (win_data->enabled && (ovl_ops && ovl_ops->commit))
ovl_ops->commit(subdrv_dev, i);
}
if (mgr_ops && mgr_ops->commit)
mgr_ops->commit(subdrv_dev);
}
static void vidi_commit(struct device *dev)
{
struct vidi_context *ctx = get_vidi_context(dev);
if (ctx->suspended)
return;
}
static int vidi_enable_vblank(struct device *dev)
{
struct vidi_context *ctx = get_vidi_context(dev);
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 overlay_ops->commit callback
*/
schedule_work(&ctx->work);
return 0;
}
static void vidi_disable_vblank(struct device *dev)
{
struct vidi_context *ctx = get_vidi_context(dev);
if (ctx->suspended)
return;
if (test_and_clear_bit(0, &ctx->irq_flags))
ctx->vblank_on = false;
}
static struct exynos_drm_manager_ops vidi_manager_ops = {
.dpms = vidi_dpms,
.apply = vidi_apply,
.commit = vidi_commit,
.enable_vblank = vidi_enable_vblank,
.disable_vblank = vidi_disable_vblank,
};
static void vidi_win_mode_set(struct device *dev,
struct exynos_drm_overlay *overlay)
{
struct vidi_context *ctx = get_vidi_context(dev);
struct vidi_win_data *win_data;
int win;
unsigned long offset;
if (!overlay) {
dev_err(dev, "overlay is NULL\n");
return;
}
win = overlay->zpos;
if (win == DEFAULT_ZPOS)
win = ctx->default_win;
if (win < 0 || win >= WINDOWS_NR)
return;
offset = overlay->fb_x * (overlay->bpp >> 3);
offset += overlay->fb_y * overlay->pitch;
DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch);
win_data = &ctx->win_data[win];
win_data->offset_x = overlay->crtc_x;
win_data->offset_y = overlay->crtc_y;
win_data->ovl_width = overlay->crtc_width;
win_data->ovl_height = overlay->crtc_height;
win_data->fb_width = overlay->fb_width;
win_data->fb_height = overlay->fb_height;
win_data->dma_addr = overlay->dma_addr[0] + offset;
win_data->bpp = overlay->bpp;
win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) *
(overlay->bpp >> 3);
win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3);
/*
* some parts of win_data should be transferred to user side
* through specific ioctl.
*/
DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
win_data->offset_x, win_data->offset_y);
DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
win_data->ovl_width, win_data->ovl_height);
DRM_DEBUG_KMS("paddr = 0x%lx\n", (unsigned long)win_data->dma_addr);
DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
overlay->fb_width, overlay->crtc_width);
}
static void vidi_win_commit(struct device *dev, int zpos)
{
struct vidi_context *ctx = get_vidi_context(dev);
struct vidi_win_data *win_data;
int win = zpos;
if (ctx->suspended)
return;
if (win == DEFAULT_ZPOS)
win = ctx->default_win;
if (win < 0 || win >= WINDOWS_NR)
return;
win_data = &ctx->win_data[win];
win_data->enabled = true;
DRM_DEBUG_KMS("dma_addr = 0x%x\n", win_data->dma_addr);
if (ctx->vblank_on)
schedule_work(&ctx->work);
}
static void vidi_win_disable(struct device *dev, int zpos)
{
struct vidi_context *ctx = get_vidi_context(dev);
struct vidi_win_data *win_data;
int win = zpos;
if (win == DEFAULT_ZPOS)
win = ctx->default_win;
if (win < 0 || win >= WINDOWS_NR)
return;
win_data = &ctx->win_data[win];
win_data->enabled = false;
/* TODO. */
}
static struct exynos_drm_overlay_ops vidi_overlay_ops = {
.mode_set = vidi_win_mode_set,
.commit = vidi_win_commit,
.disable = vidi_win_disable,
};
static struct exynos_drm_manager vidi_manager = {
.pipe = -1,
.ops = &vidi_manager_ops,
.overlay_ops = &vidi_overlay_ops,
.display_ops = &vidi_display_ops,
};
static void vidi_fake_vblank_handler(struct work_struct *work)
{
struct vidi_context *ctx = container_of(work, struct vidi_context,
work);
struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
struct exynos_drm_manager *manager = subdrv->manager;
if (manager->pipe < 0)
return;
/* refresh rate is about 50Hz. */
usleep_range(16000, 20000);
mutex_lock(&ctx->lock);
if (ctx->direct_vblank) {
drm_handle_vblank(subdrv->drm_dev, manager->pipe);
ctx->direct_vblank = false;
mutex_unlock(&ctx->lock);
return;
}
mutex_unlock(&ctx->lock);
exynos_drm_crtc_finish_pageflip(subdrv->drm_dev, manager->pipe);
}
static int vidi_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
{
/*
* enable drm irq mode.
* - with irq_enabled = true, we can use the vblank feature.
*
* P.S. note that we wouldn't use drm irq handler but
* just specific driver own one instead because
* drm framework supports only one irq handler.
*/
drm_dev->irq_enabled = true;
/*
* with vblank_disable_allowed = true, vblank interrupt will be disabled
* by drm timer once a current process gives up ownership of
* vblank event.(after drm_vblank_put function is called)
*/
drm_dev->vblank_disable_allowed = true;
return 0;
}
static void vidi_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
{
/* TODO. */
}
static int vidi_power_on(struct vidi_context *ctx, bool enable)
{
struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
struct device *dev = subdrv->dev;
if (enable) {
ctx->suspended = false;
/* if vblank was enabled status, enable it again. */
if (test_and_clear_bit(0, &ctx->irq_flags))
vidi_enable_vblank(dev);
vidi_apply(dev);
} else {
ctx->suspended = true;
}
return 0;
}
static int vidi_show_connection(struct device *dev,
struct device_attribute *attr, char *buf)
{
int rc;
struct vidi_context *ctx = get_vidi_context(dev);
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 = get_vidi_context(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->subdrv.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 = NULL;
struct drm_encoder *encoder;
struct exynos_drm_manager *manager;
struct exynos_drm_display_ops *display_ops;
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;
}
list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list,
head) {
manager = exynos_drm_get_manager(encoder);
display_ops = manager->display_ops;
if (display_ops->type == EXYNOS_DISPLAY_TYPE_VIDI) {
ctx = get_vidi_context(manager->dev);
break;
}
}
if (!ctx) {
DRM_DEBUG_KMS("not found virtual device type encoder.\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->subdrv.drm_dev);
return 0;
}
static int vidi_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct vidi_context *ctx;
struct exynos_drm_subdrv *subdrv;
int ret;
ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
ctx->default_win = 0;
INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
subdrv = &ctx->subdrv;
subdrv->dev = dev;
subdrv->manager = &vidi_manager;
subdrv->probe = vidi_subdrv_probe;
subdrv->remove = vidi_subdrv_remove;
mutex_init(&ctx->lock);
platform_set_drvdata(pdev, ctx);
ret = device_create_file(dev, &dev_attr_connection);
if (ret < 0)
DRM_INFO("failed to create connection sysfs.\n");
exynos_drm_subdrv_register(subdrv);
return 0;
}
static int vidi_remove(struct platform_device *pdev)
{
struct vidi_context *ctx = platform_get_drvdata(pdev);
exynos_drm_subdrv_unregister(&ctx->subdrv);
if (ctx->raw_edid != (struct edid *)fake_edid_info) {
kfree(ctx->raw_edid);
ctx->raw_edid = NULL;
}
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int vidi_suspend(struct device *dev)
{
struct vidi_context *ctx = get_vidi_context(dev);
return vidi_power_on(ctx, false);
}
static int vidi_resume(struct device *dev)
{
struct vidi_context *ctx = get_vidi_context(dev);
return vidi_power_on(ctx, true);
}
#endif
static const struct dev_pm_ops vidi_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(vidi_suspend, vidi_resume)
};
struct platform_driver vidi_driver = {
.probe = vidi_probe,
.remove = vidi_remove,
.driver = {
.name = "exynos-drm-vidi",
.owner = THIS_MODULE,
.pm = &vidi_pm_ops,
},
};