linux/drivers/gpu/drm/exynos/exynos_drm_encoder.c
Matt Roper 0886327aae drm/exynos: Restrict plane loops to only operate on overlay planes (v2)
Ensure that existing driver loops over all planes do not change behavior
when we begin adding new types of planes (primary and cursor) to the DRM
plane list in future patches.

v2: Switch to using drm_for_each_legacy_plane()

Cc: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
2014-04-01 20:11:18 -04:00

198 lines
5.4 KiB
C

/* exynos_drm_encoder.c
*
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
* Authors:
* Inki Dae <inki.dae@samsung.com>
* Joonyoung Shim <jy0922.shim@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 <drm/drm_crtc_helper.h>
#include "exynos_drm_drv.h"
#include "exynos_drm_encoder.h"
#define to_exynos_encoder(x) container_of(x, struct exynos_drm_encoder,\
drm_encoder)
/*
* exynos specific encoder structure.
*
* @drm_encoder: encoder object.
* @display: the display structure that maps to this encoder
*/
struct exynos_drm_encoder {
struct drm_encoder drm_encoder;
struct exynos_drm_display *display;
};
static void exynos_drm_encoder_dpms(struct drm_encoder *encoder, int mode)
{
struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
struct exynos_drm_display *display = exynos_encoder->display;
DRM_DEBUG_KMS("encoder dpms: %d\n", mode);
if (display->ops->dpms)
display->ops->dpms(display, mode);
}
static bool
exynos_drm_encoder_mode_fixup(struct drm_encoder *encoder,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
struct drm_device *dev = encoder->dev;
struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
struct exynos_drm_display *display = exynos_encoder->display;
struct drm_connector *connector;
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
if (connector->encoder != encoder)
continue;
if (display->ops->mode_fixup)
display->ops->mode_fixup(display, connector, mode,
adjusted_mode);
}
return true;
}
static void exynos_drm_encoder_mode_set(struct drm_encoder *encoder,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
struct exynos_drm_display *display = exynos_encoder->display;
if (display->ops->mode_set)
display->ops->mode_set(display, adjusted_mode);
}
static void exynos_drm_encoder_prepare(struct drm_encoder *encoder)
{
/* drm framework doesn't check NULL. */
}
static void exynos_drm_encoder_commit(struct drm_encoder *encoder)
{
struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
struct exynos_drm_display *display = exynos_encoder->display;
if (display->ops->dpms)
display->ops->dpms(display, DRM_MODE_DPMS_ON);
if (display->ops->commit)
display->ops->commit(display);
}
static void exynos_drm_encoder_disable(struct drm_encoder *encoder)
{
struct drm_plane *plane;
struct drm_device *dev = encoder->dev;
exynos_drm_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
/* all planes connected to this encoder should be also disabled. */
drm_for_each_legacy_plane(plane, &dev->mode_config.plane_list) {
if (plane->crtc == encoder->crtc)
plane->funcs->disable_plane(plane);
}
}
static struct drm_encoder_helper_funcs exynos_encoder_helper_funcs = {
.dpms = exynos_drm_encoder_dpms,
.mode_fixup = exynos_drm_encoder_mode_fixup,
.mode_set = exynos_drm_encoder_mode_set,
.prepare = exynos_drm_encoder_prepare,
.commit = exynos_drm_encoder_commit,
.disable = exynos_drm_encoder_disable,
};
static void exynos_drm_encoder_destroy(struct drm_encoder *encoder)
{
struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
drm_encoder_cleanup(encoder);
kfree(exynos_encoder);
}
static struct drm_encoder_funcs exynos_encoder_funcs = {
.destroy = exynos_drm_encoder_destroy,
};
static unsigned int exynos_drm_encoder_clones(struct drm_encoder *encoder)
{
struct drm_encoder *clone;
struct drm_device *dev = encoder->dev;
struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
struct exynos_drm_display *display = exynos_encoder->display;
unsigned int clone_mask = 0;
int cnt = 0;
list_for_each_entry(clone, &dev->mode_config.encoder_list, head) {
switch (display->type) {
case EXYNOS_DISPLAY_TYPE_LCD:
case EXYNOS_DISPLAY_TYPE_HDMI:
case EXYNOS_DISPLAY_TYPE_VIDI:
clone_mask |= (1 << (cnt++));
break;
default:
continue;
}
}
return clone_mask;
}
void exynos_drm_encoder_setup(struct drm_device *dev)
{
struct drm_encoder *encoder;
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
encoder->possible_clones = exynos_drm_encoder_clones(encoder);
}
struct drm_encoder *
exynos_drm_encoder_create(struct drm_device *dev,
struct exynos_drm_display *display,
unsigned long possible_crtcs)
{
struct drm_encoder *encoder;
struct exynos_drm_encoder *exynos_encoder;
if (!possible_crtcs)
return NULL;
exynos_encoder = kzalloc(sizeof(*exynos_encoder), GFP_KERNEL);
if (!exynos_encoder)
return NULL;
exynos_encoder->display = display;
encoder = &exynos_encoder->drm_encoder;
encoder->possible_crtcs = possible_crtcs;
DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
drm_encoder_init(dev, encoder, &exynos_encoder_funcs,
DRM_MODE_ENCODER_TMDS);
drm_encoder_helper_add(encoder, &exynos_encoder_helper_funcs);
DRM_DEBUG_KMS("encoder has been created\n");
return encoder;
}
struct exynos_drm_display *exynos_drm_get_display(struct drm_encoder *encoder)
{
return to_exynos_encoder(encoder)->display;
}