linux/drivers/gpu/drm/sti/sti_drm_crtc.c
Dave Airlie 8bb652eb38 drm/sti: fix warning in build.
Signed-off-by: Dave Airlie <airlied@redhat.com>
2014-08-05 09:41:42 +10:00

422 lines
11 KiB
C

/*
* Copyright (C) STMicroelectronics SA 2014
* Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
* Fabien Dessenne <fabien.dessenne@st.com>
* for STMicroelectronics.
* License terms: GNU General Public License (GPL), version 2
*/
#include <linux/clk.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include "sti_compositor.h"
#include "sti_drm_drv.h"
#include "sti_drm_crtc.h"
#include "sti_vtg.h"
static void sti_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
{
DRM_DEBUG_KMS("\n");
}
static void sti_drm_crtc_prepare(struct drm_crtc *crtc)
{
struct sti_mixer *mixer = to_sti_mixer(crtc);
struct device *dev = mixer->dev;
struct sti_compositor *compo = dev_get_drvdata(dev);
compo->enable = true;
/* Prepare and enable the compo IP clock */
if (mixer->id == STI_MIXER_MAIN) {
if (clk_prepare_enable(compo->clk_compo_main))
DRM_INFO("Failed to prepare/enable compo_main clk\n");
} else {
if (clk_prepare_enable(compo->clk_compo_aux))
DRM_INFO("Failed to prepare/enable compo_aux clk\n");
}
}
static void sti_drm_crtc_commit(struct drm_crtc *crtc)
{
struct sti_mixer *mixer = to_sti_mixer(crtc);
struct device *dev = mixer->dev;
struct sti_compositor *compo = dev_get_drvdata(dev);
struct sti_layer *layer;
if ((!mixer || !compo)) {
DRM_ERROR("Can not find mixer or compositor)\n");
return;
}
/* get GDP which is reserved to the CRTC FB */
layer = to_sti_layer(crtc->primary);
if (layer)
sti_layer_commit(layer);
else
DRM_ERROR("Can not find CRTC dedicated plane (GDP0)\n");
/* Enable layer on mixer */
if (sti_mixer_set_layer_status(mixer, layer, true))
DRM_ERROR("Can not enable layer at mixer\n");
}
static bool sti_drm_crtc_mode_fixup(struct drm_crtc *crtc,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
/* accept the provided drm_display_mode, do not fix it up */
return true;
}
static int
sti_drm_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode, int x, int y,
struct drm_framebuffer *old_fb)
{
struct sti_mixer *mixer = to_sti_mixer(crtc);
struct device *dev = mixer->dev;
struct sti_compositor *compo = dev_get_drvdata(dev);
struct sti_layer *layer;
struct clk *clk;
int rate = mode->clock * 1000;
int res;
unsigned int w, h;
DRM_DEBUG_KMS("CRTC:%d (%s) fb:%d mode:%d (%s)\n",
crtc->base.id, sti_mixer_to_str(mixer),
crtc->primary->fb->base.id, mode->base.id, mode->name);
DRM_DEBUG_KMS("%d %d %d %d %d %d %d %d %d %d 0x%x 0x%x\n",
mode->vrefresh, mode->clock,
mode->hdisplay,
mode->hsync_start, mode->hsync_end,
mode->htotal,
mode->vdisplay,
mode->vsync_start, mode->vsync_end,
mode->vtotal, mode->type, mode->flags);
/* Set rate and prepare/enable pixel clock */
if (mixer->id == STI_MIXER_MAIN)
clk = compo->clk_pix_main;
else
clk = compo->clk_pix_aux;
res = clk_set_rate(clk, rate);
if (res < 0) {
DRM_ERROR("Cannot set rate (%dHz) for pix clk\n", rate);
return -EINVAL;
}
if (clk_prepare_enable(clk)) {
DRM_ERROR("Failed to prepare/enable pix clk\n");
return -EINVAL;
}
sti_vtg_set_config(mixer->id == STI_MIXER_MAIN ?
compo->vtg_main : compo->vtg_aux, &crtc->mode);
/* a GDP is reserved to the CRTC FB */
layer = to_sti_layer(crtc->primary);
if (!layer) {
DRM_ERROR("Can not find GDP0)\n");
return -EINVAL;
}
/* copy the mode data adjusted by mode_fixup() into crtc->mode
* so that hardware can be set to proper mode
*/
memcpy(&crtc->mode, adjusted_mode, sizeof(*adjusted_mode));
res = sti_mixer_set_layer_depth(mixer, layer);
if (res) {
DRM_ERROR("Can not set layer depth\n");
return -EINVAL;
}
res = sti_mixer_active_video_area(mixer, &crtc->mode);
if (res) {
DRM_ERROR("Can not set active video area\n");
return -EINVAL;
}
w = crtc->primary->fb->width - x;
h = crtc->primary->fb->height - y;
return sti_layer_prepare(layer, crtc->primary->fb, &crtc->mode,
mixer->id, 0, 0, w, h, x, y, w, h);
}
static int sti_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
struct drm_framebuffer *old_fb)
{
struct sti_mixer *mixer = to_sti_mixer(crtc);
struct sti_layer *layer;
unsigned int w, h;
int ret;
DRM_DEBUG_KMS("CRTC:%d (%s) fb:%d (%d,%d)\n",
crtc->base.id, sti_mixer_to_str(mixer),
crtc->primary->fb->base.id, x, y);
/* GDP is reserved to the CRTC FB */
layer = to_sti_layer(crtc->primary);
if (!layer) {
DRM_ERROR("Can not find GDP0)\n");
ret = -EINVAL;
goto out;
}
w = crtc->primary->fb->width - crtc->x;
h = crtc->primary->fb->height - crtc->y;
ret = sti_layer_prepare(layer, crtc->primary->fb, &crtc->mode,
mixer->id, 0, 0, w, h,
crtc->x, crtc->y, w, h);
if (ret) {
DRM_ERROR("Can not prepare layer\n");
goto out;
}
sti_drm_crtc_commit(crtc);
out:
return ret;
}
static void sti_drm_crtc_load_lut(struct drm_crtc *crtc)
{
/* do nothing */
}
static void sti_drm_crtc_disable(struct drm_crtc *crtc)
{
struct sti_mixer *mixer = to_sti_mixer(crtc);
struct device *dev = mixer->dev;
struct sti_compositor *compo = dev_get_drvdata(dev);
struct sti_layer *layer;
if (!compo->enable)
return;
DRM_DEBUG_KMS("CRTC:%d (%s)\n", crtc->base.id, sti_mixer_to_str(mixer));
/* Disable Background */
sti_mixer_set_background_status(mixer, false);
/* Disable GDP */
layer = to_sti_layer(crtc->primary);
if (!layer) {
DRM_ERROR("Cannot find GDP0\n");
return;
}
/* Disable layer at mixer level */
if (sti_mixer_set_layer_status(mixer, layer, false))
DRM_ERROR("Can not disable %s layer at mixer\n",
sti_layer_to_str(layer));
/* Wait a while to be sure that a Vsync event is received */
msleep(WAIT_NEXT_VSYNC_MS);
/* Then disable layer itself */
sti_layer_disable(layer);
drm_vblank_off(crtc->dev, mixer->id);
/* Disable pixel clock and compo IP clocks */
if (mixer->id == STI_MIXER_MAIN) {
clk_disable_unprepare(compo->clk_pix_main);
clk_disable_unprepare(compo->clk_compo_main);
} else {
clk_disable_unprepare(compo->clk_pix_aux);
clk_disable_unprepare(compo->clk_compo_aux);
}
compo->enable = false;
}
static struct drm_crtc_helper_funcs sti_crtc_helper_funcs = {
.dpms = sti_drm_crtc_dpms,
.prepare = sti_drm_crtc_prepare,
.commit = sti_drm_crtc_commit,
.mode_fixup = sti_drm_crtc_mode_fixup,
.mode_set = sti_drm_crtc_mode_set,
.mode_set_base = sti_drm_crtc_mode_set_base,
.load_lut = sti_drm_crtc_load_lut,
.disable = sti_drm_crtc_disable,
};
static int sti_drm_crtc_page_flip(struct drm_crtc *crtc,
struct drm_framebuffer *fb,
struct drm_pending_vblank_event *event,
uint32_t page_flip_flags)
{
struct drm_device *drm_dev = crtc->dev;
struct drm_framebuffer *old_fb;
struct sti_mixer *mixer = to_sti_mixer(crtc);
unsigned long flags;
int ret;
DRM_DEBUG_KMS("fb %d --> fb %d\n",
crtc->primary->fb->base.id, fb->base.id);
mutex_lock(&drm_dev->struct_mutex);
old_fb = crtc->primary->fb;
crtc->primary->fb = fb;
ret = sti_drm_crtc_mode_set_base(crtc, crtc->x, crtc->y, old_fb);
if (ret) {
DRM_ERROR("failed\n");
crtc->primary->fb = old_fb;
goto out;
}
if (event) {
event->pipe = mixer->id;
ret = drm_vblank_get(drm_dev, event->pipe);
if (ret) {
DRM_ERROR("Cannot get vblank\n");
goto out;
}
spin_lock_irqsave(&drm_dev->event_lock, flags);
if (mixer->pending_event) {
drm_vblank_put(drm_dev, event->pipe);
ret = -EBUSY;
} else {
mixer->pending_event = event;
}
spin_unlock_irqrestore(&drm_dev->event_lock, flags);
}
out:
mutex_unlock(&drm_dev->struct_mutex);
return ret;
}
static void sti_drm_crtc_destroy(struct drm_crtc *crtc)
{
DRM_DEBUG_KMS("\n");
drm_crtc_cleanup(crtc);
}
static int sti_drm_crtc_set_property(struct drm_crtc *crtc,
struct drm_property *property,
uint64_t val)
{
DRM_DEBUG_KMS("\n");
return 0;
}
int sti_drm_crtc_vblank_cb(struct notifier_block *nb,
unsigned long event, void *data)
{
struct drm_device *drm_dev;
struct sti_compositor *compo =
container_of(nb, struct sti_compositor, vtg_vblank_nb);
int *crtc = data;
unsigned long flags;
struct sti_drm_private *priv;
drm_dev = compo->mixer[*crtc]->drm_crtc.dev;
priv = drm_dev->dev_private;
if ((event != VTG_TOP_FIELD_EVENT) &&
(event != VTG_BOTTOM_FIELD_EVENT)) {
DRM_ERROR("unknown event: %lu\n", event);
return -EINVAL;
}
drm_handle_vblank(drm_dev, *crtc);
spin_lock_irqsave(&drm_dev->event_lock, flags);
if (compo->mixer[*crtc]->pending_event) {
drm_send_vblank_event(drm_dev, -1,
compo->mixer[*crtc]->pending_event);
drm_vblank_put(drm_dev, *crtc);
compo->mixer[*crtc]->pending_event = NULL;
}
spin_unlock_irqrestore(&drm_dev->event_lock, flags);
return 0;
}
int sti_drm_crtc_enable_vblank(struct drm_device *dev, int crtc)
{
struct sti_drm_private *dev_priv = dev->dev_private;
struct sti_compositor *compo = dev_priv->compo;
struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb;
if (sti_vtg_register_client(crtc == STI_MIXER_MAIN ?
compo->vtg_main : compo->vtg_aux,
vtg_vblank_nb, crtc)) {
DRM_ERROR("Cannot register VTG notifier\n");
return -EINVAL;
}
return 0;
}
EXPORT_SYMBOL(sti_drm_crtc_enable_vblank);
void sti_drm_crtc_disable_vblank(struct drm_device *dev, int crtc)
{
struct sti_drm_private *priv = dev->dev_private;
struct sti_compositor *compo = priv->compo;
struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb;
unsigned long flags;
DRM_DEBUG_DRIVER("\n");
if (sti_vtg_unregister_client(crtc == STI_MIXER_MAIN ?
compo->vtg_main : compo->vtg_aux, vtg_vblank_nb))
DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n");
/* free the resources of the pending requests */
spin_lock_irqsave(&dev->event_lock, flags);
if (compo->mixer[crtc]->pending_event) {
drm_vblank_put(dev, crtc);
compo->mixer[crtc]->pending_event = NULL;
}
spin_unlock_irqrestore(&dev->event_lock, flags);
}
EXPORT_SYMBOL(sti_drm_crtc_disable_vblank);
static struct drm_crtc_funcs sti_crtc_funcs = {
.set_config = drm_crtc_helper_set_config,
.page_flip = sti_drm_crtc_page_flip,
.destroy = sti_drm_crtc_destroy,
.set_property = sti_drm_crtc_set_property,
};
bool sti_drm_crtc_is_main(struct drm_crtc *crtc)
{
struct sti_mixer *mixer = to_sti_mixer(crtc);
if (mixer->id == STI_MIXER_MAIN)
return true;
return false;
}
int sti_drm_crtc_init(struct drm_device *drm_dev, struct sti_mixer *mixer,
struct drm_plane *primary, struct drm_plane *cursor)
{
struct drm_crtc *crtc = &mixer->drm_crtc;
int res;
res = drm_crtc_init_with_planes(drm_dev, crtc, primary, cursor,
&sti_crtc_funcs);
if (res) {
DRM_ERROR("Can not initialze CRTC\n");
return -EINVAL;
}
drm_crtc_helper_add(crtc, &sti_crtc_helper_funcs);
DRM_DEBUG_DRIVER("drm CRTC:%d mapped to %s\n",
crtc->base.id, sti_mixer_to_str(mixer));
return 0;
}