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linux-next/drivers/gpu/drm/exynos/exynos_drm_vidi.c
Gustavo Padovan cf67cc9a29 drm/exynos: remove struct exynos_drm_display 
This struct was just representing encoder information, it was a member of
struct exynos_drm_encoder, so any code trying to access encoder data would
have to go through the encoder struct, get the display struct and then get
the data it want.

During this patchset we also realized that the only data
exynos_drm_encoder needs to store is the drm_encoder parent and the
exynos_drm_encoder_ops.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
2015-08-16 10:23:36 +09:00

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/* 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_encoder.h"
#include "exynos_drm_vidi.h"
/* 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 exynos_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 default_win;
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 exynos_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 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);
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);
exynos_drm_crtc_finish_pageflip(ctx->crtc);
}
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.base;
}
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 exynos_drm_encoder *exynos_encoder)
{
struct vidi_context *ctx = encoder_to_vidi(exynos_encoder);
struct drm_encoder *encoder = &exynos_encoder->base;
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 struct exynos_drm_encoder_ops vidi_encoder_ops = {
.create_connector = vidi_create_connector,
};
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 exynos_drm_plane *exynos_plane;
enum drm_plane_type type;
unsigned int zpos;
int ret;
vidi_ctx_initialize(ctx, drm_dev);
for (zpos = 0; zpos < WINDOWS_NR; zpos++) {
type = (zpos == ctx->default_win) ? DRM_PLANE_TYPE_PRIMARY :
DRM_PLANE_TYPE_OVERLAY;
ret = exynos_plane_init(drm_dev, &ctx->planes[zpos],
1 << ctx->pipe, type, zpos);
if (ret)
return ret;
}
exynos_plane = &ctx->planes[ctx->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);
}
ret = exynos_drm_create_enc_conn(drm_dev, &ctx->encoder,
EXYNOS_DISPLAY_TYPE_VIDI);
if (ret) {
ctx->crtc->base.funcs->destroy(&ctx->crtc->base);
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->encoder.ops = &vidi_encoder_ops;
ctx->default_win = 0;
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,
},
};
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