linux/drivers/gpu/drm/exynos/exynos_drm_hdmi.c
Seung-Woo Kim d873ab99ac drm/exynos: cleanup device pointer usages
Struct device pointer got from platform device pointer is already
alsigned as variable, but some functions do not use device pointer.
So this patch replaces thoes usages.

Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
2013-05-23 19:48:34 +09:00

484 lines
11 KiB
C

/*
* Copyright (C) 2011 Samsung Electronics Co.Ltd
* Authors:
* Inki Dae <inki.dae@samsung.com>
* Seung-Woo Kim <sw0312.kim@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/wait.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <drm/exynos_drm.h>
#include "exynos_drm_drv.h"
#include "exynos_drm_hdmi.h"
#define to_context(dev) platform_get_drvdata(to_platform_device(dev))
#define to_subdrv(dev) to_context(dev)
#define get_ctx_from_subdrv(subdrv) container_of(subdrv,\
struct drm_hdmi_context, subdrv);
/* platform device pointer for common drm hdmi device. */
static struct platform_device *exynos_drm_hdmi_pdev;
/* Common hdmi subdrv needs to access the hdmi and mixer though context.
* These should be initialied by the repective drivers */
static struct exynos_drm_hdmi_context *hdmi_ctx;
static struct exynos_drm_hdmi_context *mixer_ctx;
/* these callback points shoud be set by specific drivers. */
static struct exynos_hdmi_ops *hdmi_ops;
static struct exynos_mixer_ops *mixer_ops;
struct drm_hdmi_context {
struct exynos_drm_subdrv subdrv;
struct exynos_drm_hdmi_context *hdmi_ctx;
struct exynos_drm_hdmi_context *mixer_ctx;
bool enabled[MIXER_WIN_NR];
};
int exynos_platform_device_hdmi_register(void)
{
struct platform_device *pdev;
if (exynos_drm_hdmi_pdev)
return -EEXIST;
pdev = platform_device_register_simple(
"exynos-drm-hdmi", -1, NULL, 0);
if (IS_ERR(pdev))
return PTR_ERR(pdev);
exynos_drm_hdmi_pdev = pdev;
return 0;
}
void exynos_platform_device_hdmi_unregister(void)
{
if (exynos_drm_hdmi_pdev) {
platform_device_unregister(exynos_drm_hdmi_pdev);
exynos_drm_hdmi_pdev = NULL;
}
}
void exynos_hdmi_drv_attach(struct exynos_drm_hdmi_context *ctx)
{
if (ctx)
hdmi_ctx = ctx;
}
void exynos_mixer_drv_attach(struct exynos_drm_hdmi_context *ctx)
{
if (ctx)
mixer_ctx = ctx;
}
void exynos_hdmi_ops_register(struct exynos_hdmi_ops *ops)
{
DRM_DEBUG_KMS("%s\n", __FILE__);
if (ops)
hdmi_ops = ops;
}
void exynos_mixer_ops_register(struct exynos_mixer_ops *ops)
{
DRM_DEBUG_KMS("%s\n", __FILE__);
if (ops)
mixer_ops = ops;
}
static bool drm_hdmi_is_connected(struct device *dev)
{
struct drm_hdmi_context *ctx = to_context(dev);
DRM_DEBUG_KMS("%s\n", __FILE__);
if (hdmi_ops && hdmi_ops->is_connected)
return hdmi_ops->is_connected(ctx->hdmi_ctx->ctx);
return false;
}
static struct edid *drm_hdmi_get_edid(struct device *dev,
struct drm_connector *connector)
{
struct drm_hdmi_context *ctx = to_context(dev);
DRM_DEBUG_KMS("%s\n", __FILE__);
if (hdmi_ops && hdmi_ops->get_edid)
return hdmi_ops->get_edid(ctx->hdmi_ctx->ctx, connector);
return NULL;
}
static int drm_hdmi_check_timing(struct device *dev, void *timing)
{
struct drm_hdmi_context *ctx = to_context(dev);
int ret = 0;
DRM_DEBUG_KMS("%s\n", __FILE__);
/*
* Both, mixer and hdmi should be able to handle the requested mode.
* If any of the two fails, return mode as BAD.
*/
if (mixer_ops && mixer_ops->check_timing)
ret = mixer_ops->check_timing(ctx->mixer_ctx->ctx, timing);
if (ret)
return ret;
if (hdmi_ops && hdmi_ops->check_timing)
return hdmi_ops->check_timing(ctx->hdmi_ctx->ctx, timing);
return 0;
}
static int drm_hdmi_power_on(struct device *dev, int mode)
{
struct drm_hdmi_context *ctx = to_context(dev);
DRM_DEBUG_KMS("%s\n", __FILE__);
if (hdmi_ops && hdmi_ops->power_on)
return hdmi_ops->power_on(ctx->hdmi_ctx->ctx, mode);
return 0;
}
static struct exynos_drm_display_ops drm_hdmi_display_ops = {
.type = EXYNOS_DISPLAY_TYPE_HDMI,
.is_connected = drm_hdmi_is_connected,
.get_edid = drm_hdmi_get_edid,
.check_timing = drm_hdmi_check_timing,
.power_on = drm_hdmi_power_on,
};
static int drm_hdmi_enable_vblank(struct device *subdrv_dev)
{
struct drm_hdmi_context *ctx = to_context(subdrv_dev);
struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
struct exynos_drm_manager *manager = subdrv->manager;
DRM_DEBUG_KMS("%s\n", __FILE__);
if (mixer_ops && mixer_ops->enable_vblank)
return mixer_ops->enable_vblank(ctx->mixer_ctx->ctx,
manager->pipe);
return 0;
}
static void drm_hdmi_disable_vblank(struct device *subdrv_dev)
{
struct drm_hdmi_context *ctx = to_context(subdrv_dev);
DRM_DEBUG_KMS("%s\n", __FILE__);
if (mixer_ops && mixer_ops->disable_vblank)
return mixer_ops->disable_vblank(ctx->mixer_ctx->ctx);
}
static void drm_hdmi_wait_for_vblank(struct device *subdrv_dev)
{
struct drm_hdmi_context *ctx = to_context(subdrv_dev);
DRM_DEBUG_KMS("%s\n", __FILE__);
if (mixer_ops && mixer_ops->wait_for_vblank)
mixer_ops->wait_for_vblank(ctx->mixer_ctx->ctx);
}
static void drm_hdmi_mode_fixup(struct device *subdrv_dev,
struct drm_connector *connector,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
struct drm_display_mode *m;
int mode_ok;
DRM_DEBUG_KMS("%s\n", __FILE__);
drm_mode_set_crtcinfo(adjusted_mode, 0);
mode_ok = drm_hdmi_check_timing(subdrv_dev, adjusted_mode);
/* just return if user desired mode exists. */
if (mode_ok == 0)
return;
/*
* otherwise, find the most suitable mode among modes and change it
* to adjusted_mode.
*/
list_for_each_entry(m, &connector->modes, head) {
mode_ok = drm_hdmi_check_timing(subdrv_dev, m);
if (mode_ok == 0) {
struct drm_mode_object base;
struct list_head head;
DRM_INFO("desired mode doesn't exist so\n");
DRM_INFO("use the most suitable mode among modes.\n");
DRM_DEBUG_KMS("Adjusted Mode: [%d]x[%d] [%d]Hz\n",
m->hdisplay, m->vdisplay, m->vrefresh);
/* preserve display mode header while copying. */
head = adjusted_mode->head;
base = adjusted_mode->base;
memcpy(adjusted_mode, m, sizeof(*m));
adjusted_mode->head = head;
adjusted_mode->base = base;
break;
}
}
}
static void drm_hdmi_mode_set(struct device *subdrv_dev, void *mode)
{
struct drm_hdmi_context *ctx = to_context(subdrv_dev);
DRM_DEBUG_KMS("%s\n", __FILE__);
if (hdmi_ops && hdmi_ops->mode_set)
hdmi_ops->mode_set(ctx->hdmi_ctx->ctx, mode);
}
static void drm_hdmi_get_max_resol(struct device *subdrv_dev,
unsigned int *width, unsigned int *height)
{
struct drm_hdmi_context *ctx = to_context(subdrv_dev);
DRM_DEBUG_KMS("%s\n", __FILE__);
if (hdmi_ops && hdmi_ops->get_max_resol)
hdmi_ops->get_max_resol(ctx->hdmi_ctx->ctx, width, height);
}
static void drm_hdmi_commit(struct device *subdrv_dev)
{
struct drm_hdmi_context *ctx = to_context(subdrv_dev);
DRM_DEBUG_KMS("%s\n", __FILE__);
if (hdmi_ops && hdmi_ops->commit)
hdmi_ops->commit(ctx->hdmi_ctx->ctx);
}
static void drm_hdmi_dpms(struct device *subdrv_dev, int mode)
{
struct drm_hdmi_context *ctx = to_context(subdrv_dev);
DRM_DEBUG_KMS("%s\n", __FILE__);
if (mixer_ops && mixer_ops->dpms)
mixer_ops->dpms(ctx->mixer_ctx->ctx, mode);
if (hdmi_ops && hdmi_ops->dpms)
hdmi_ops->dpms(ctx->hdmi_ctx->ctx, mode);
}
static void drm_hdmi_apply(struct device *subdrv_dev)
{
struct drm_hdmi_context *ctx = to_context(subdrv_dev);
int i;
DRM_DEBUG_KMS("%s\n", __FILE__);
for (i = 0; i < MIXER_WIN_NR; i++) {
if (!ctx->enabled[i])
continue;
if (mixer_ops && mixer_ops->win_commit)
mixer_ops->win_commit(ctx->mixer_ctx->ctx, i);
}
if (hdmi_ops && hdmi_ops->commit)
hdmi_ops->commit(ctx->hdmi_ctx->ctx);
}
static struct exynos_drm_manager_ops drm_hdmi_manager_ops = {
.dpms = drm_hdmi_dpms,
.apply = drm_hdmi_apply,
.enable_vblank = drm_hdmi_enable_vblank,
.disable_vblank = drm_hdmi_disable_vblank,
.wait_for_vblank = drm_hdmi_wait_for_vblank,
.mode_fixup = drm_hdmi_mode_fixup,
.mode_set = drm_hdmi_mode_set,
.get_max_resol = drm_hdmi_get_max_resol,
.commit = drm_hdmi_commit,
};
static void drm_mixer_mode_set(struct device *subdrv_dev,
struct exynos_drm_overlay *overlay)
{
struct drm_hdmi_context *ctx = to_context(subdrv_dev);
DRM_DEBUG_KMS("%s\n", __FILE__);
if (mixer_ops && mixer_ops->win_mode_set)
mixer_ops->win_mode_set(ctx->mixer_ctx->ctx, overlay);
}
static void drm_mixer_commit(struct device *subdrv_dev, int zpos)
{
struct drm_hdmi_context *ctx = to_context(subdrv_dev);
int win = (zpos == DEFAULT_ZPOS) ? MIXER_DEFAULT_WIN : zpos;
DRM_DEBUG_KMS("%s\n", __FILE__);
if (win < 0 || win > MIXER_WIN_NR) {
DRM_ERROR("mixer window[%d] is wrong\n", win);
return;
}
if (mixer_ops && mixer_ops->win_commit)
mixer_ops->win_commit(ctx->mixer_ctx->ctx, win);
ctx->enabled[win] = true;
}
static void drm_mixer_disable(struct device *subdrv_dev, int zpos)
{
struct drm_hdmi_context *ctx = to_context(subdrv_dev);
int win = (zpos == DEFAULT_ZPOS) ? MIXER_DEFAULT_WIN : zpos;
DRM_DEBUG_KMS("%s\n", __FILE__);
if (win < 0 || win > MIXER_WIN_NR) {
DRM_ERROR("mixer window[%d] is wrong\n", win);
return;
}
if (mixer_ops && mixer_ops->win_disable)
mixer_ops->win_disable(ctx->mixer_ctx->ctx, win);
ctx->enabled[win] = false;
}
static struct exynos_drm_overlay_ops drm_hdmi_overlay_ops = {
.mode_set = drm_mixer_mode_set,
.commit = drm_mixer_commit,
.disable = drm_mixer_disable,
};
static struct exynos_drm_manager hdmi_manager = {
.pipe = -1,
.ops = &drm_hdmi_manager_ops,
.overlay_ops = &drm_hdmi_overlay_ops,
.display_ops = &drm_hdmi_display_ops,
};
static int hdmi_subdrv_probe(struct drm_device *drm_dev,
struct device *dev)
{
struct exynos_drm_subdrv *subdrv = to_subdrv(dev);
struct drm_hdmi_context *ctx;
DRM_DEBUG_KMS("%s\n", __FILE__);
if (!hdmi_ctx) {
DRM_ERROR("hdmi context not initialized.\n");
return -EFAULT;
}
if (!mixer_ctx) {
DRM_ERROR("mixer context not initialized.\n");
return -EFAULT;
}
ctx = get_ctx_from_subdrv(subdrv);
if (!ctx) {
DRM_ERROR("no drm hdmi context.\n");
return -EFAULT;
}
ctx->hdmi_ctx = hdmi_ctx;
ctx->mixer_ctx = mixer_ctx;
ctx->hdmi_ctx->drm_dev = drm_dev;
ctx->mixer_ctx->drm_dev = drm_dev;
if (mixer_ops->iommu_on)
mixer_ops->iommu_on(ctx->mixer_ctx->ctx, true);
return 0;
}
static void hdmi_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
{
struct drm_hdmi_context *ctx;
struct exynos_drm_subdrv *subdrv = to_subdrv(dev);
ctx = get_ctx_from_subdrv(subdrv);
if (mixer_ops->iommu_on)
mixer_ops->iommu_on(ctx->mixer_ctx->ctx, false);
}
static int exynos_drm_hdmi_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct exynos_drm_subdrv *subdrv;
struct drm_hdmi_context *ctx;
DRM_DEBUG_KMS("%s\n", __FILE__);
ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx) {
DRM_LOG_KMS("failed to alloc common hdmi context.\n");
return -ENOMEM;
}
subdrv = &ctx->subdrv;
subdrv->dev = dev;
subdrv->manager = &hdmi_manager;
subdrv->probe = hdmi_subdrv_probe;
subdrv->remove = hdmi_subdrv_remove;
platform_set_drvdata(pdev, subdrv);
exynos_drm_subdrv_register(subdrv);
return 0;
}
static int exynos_drm_hdmi_remove(struct platform_device *pdev)
{
struct drm_hdmi_context *ctx = platform_get_drvdata(pdev);
DRM_DEBUG_KMS("%s\n", __FILE__);
exynos_drm_subdrv_unregister(&ctx->subdrv);
return 0;
}
struct platform_driver exynos_drm_common_hdmi_driver = {
.probe = exynos_drm_hdmi_probe,
.remove = exynos_drm_hdmi_remove,
.driver = {
.name = "exynos-drm-hdmi",
.owner = THIS_MODULE,
},
};