linux-sg2042/drivers/gpu/drm/omapdrm/omap_crtc.c

689 lines
18 KiB
C

/*
* drivers/gpu/drm/omapdrm/omap_crtc.c
*
* Copyright (C) 2011 Texas Instruments
* Author: Rob Clark <rob@ti.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "omap_drv.h"
#include <drm/drm_mode.h>
#include "drm_crtc.h"
#include "drm_crtc_helper.h"
#define to_omap_crtc(x) container_of(x, struct omap_crtc, base)
struct omap_crtc {
struct drm_crtc base;
struct drm_plane *plane;
const char *name;
int pipe;
enum omap_channel channel;
struct omap_overlay_manager_info info;
/*
* Temporary: eventually this will go away, but it is needed
* for now to keep the output's happy. (They only need
* mgr->id.) Eventually this will be replaced w/ something
* more common-panel-framework-y
*/
struct omap_overlay_manager *mgr;
struct omap_video_timings timings;
bool enabled;
bool full_update;
struct omap_drm_apply apply;
struct omap_drm_irq apply_irq;
struct omap_drm_irq error_irq;
/* list of in-progress apply's: */
struct list_head pending_applies;
/* list of queued apply's: */
struct list_head queued_applies;
/* for handling queued and in-progress applies: */
struct work_struct apply_work;
/* if there is a pending flip, these will be non-null: */
struct drm_pending_vblank_event *event;
struct drm_framebuffer *old_fb;
/* for handling page flips without caring about what
* the callback is called from. Possibly we should just
* make omap_gem always call the cb from the worker so
* we don't have to care about this..
*
* XXX maybe fold into apply_work??
*/
struct work_struct page_flip_work;
};
uint32_t pipe2vbl(struct drm_crtc *crtc)
{
struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
return dispc_mgr_get_vsync_irq(omap_crtc->channel);
}
/*
* Manager-ops, callbacks from output when they need to configure
* the upstream part of the video pipe.
*
* Most of these we can ignore until we add support for command-mode
* panels.. for video-mode the crtc-helpers already do an adequate
* job of sequencing the setup of the video pipe in the proper order
*/
/* ovl-mgr-id -> crtc */
static struct omap_crtc *omap_crtcs[8];
/* we can probably ignore these until we support command-mode panels: */
static int omap_crtc_connect(struct omap_overlay_manager *mgr,
struct omap_dss_device *dst)
{
if (mgr->output)
return -EINVAL;
if ((mgr->supported_outputs & dst->id) == 0)
return -EINVAL;
dst->manager = mgr;
mgr->output = dst;
return 0;
}
static void omap_crtc_disconnect(struct omap_overlay_manager *mgr,
struct omap_dss_device *dst)
{
mgr->output->manager = NULL;
mgr->output = NULL;
}
static void omap_crtc_start_update(struct omap_overlay_manager *mgr)
{
}
static int omap_crtc_enable(struct omap_overlay_manager *mgr)
{
return 0;
}
static void omap_crtc_disable(struct omap_overlay_manager *mgr)
{
}
static void omap_crtc_set_timings(struct omap_overlay_manager *mgr,
const struct omap_video_timings *timings)
{
struct omap_crtc *omap_crtc = omap_crtcs[mgr->id];
DBG("%s", omap_crtc->name);
omap_crtc->timings = *timings;
omap_crtc->full_update = true;
}
static void omap_crtc_set_lcd_config(struct omap_overlay_manager *mgr,
const struct dss_lcd_mgr_config *config)
{
struct omap_crtc *omap_crtc = omap_crtcs[mgr->id];
DBG("%s", omap_crtc->name);
dispc_mgr_set_lcd_config(omap_crtc->channel, config);
}
static int omap_crtc_register_framedone_handler(
struct omap_overlay_manager *mgr,
void (*handler)(void *), void *data)
{
return 0;
}
static void omap_crtc_unregister_framedone_handler(
struct omap_overlay_manager *mgr,
void (*handler)(void *), void *data)
{
}
static const struct dss_mgr_ops mgr_ops = {
.connect = omap_crtc_connect,
.disconnect = omap_crtc_disconnect,
.start_update = omap_crtc_start_update,
.enable = omap_crtc_enable,
.disable = omap_crtc_disable,
.set_timings = omap_crtc_set_timings,
.set_lcd_config = omap_crtc_set_lcd_config,
.register_framedone_handler = omap_crtc_register_framedone_handler,
.unregister_framedone_handler = omap_crtc_unregister_framedone_handler,
};
/*
* CRTC funcs:
*/
static void omap_crtc_destroy(struct drm_crtc *crtc)
{
struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
DBG("%s", omap_crtc->name);
WARN_ON(omap_crtc->apply_irq.registered);
omap_irq_unregister(crtc->dev, &omap_crtc->error_irq);
omap_crtc->plane->funcs->destroy(omap_crtc->plane);
drm_crtc_cleanup(crtc);
kfree(omap_crtc);
}
static void omap_crtc_dpms(struct drm_crtc *crtc, int mode)
{
struct omap_drm_private *priv = crtc->dev->dev_private;
struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
bool enabled = (mode == DRM_MODE_DPMS_ON);
int i;
DBG("%s: %d", omap_crtc->name, mode);
if (enabled != omap_crtc->enabled) {
omap_crtc->enabled = enabled;
omap_crtc->full_update = true;
omap_crtc_apply(crtc, &omap_crtc->apply);
/* also enable our private plane: */
WARN_ON(omap_plane_dpms(omap_crtc->plane, mode));
/* and any attached overlay planes: */
for (i = 0; i < priv->num_planes; i++) {
struct drm_plane *plane = priv->planes[i];
if (plane->crtc == crtc)
WARN_ON(omap_plane_dpms(plane, mode));
}
}
}
static bool omap_crtc_mode_fixup(struct drm_crtc *crtc,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
return true;
}
static int omap_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 omap_crtc *omap_crtc = to_omap_crtc(crtc);
mode = adjusted_mode;
DBG("%s: set mode: %d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x",
omap_crtc->name, mode->base.id, mode->name,
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);
copy_timings_drm_to_omap(&omap_crtc->timings, mode);
omap_crtc->full_update = true;
return omap_plane_mode_set(omap_crtc->plane, crtc, crtc->fb,
0, 0, mode->hdisplay, mode->vdisplay,
x << 16, y << 16,
mode->hdisplay << 16, mode->vdisplay << 16,
NULL, NULL);
}
static void omap_crtc_prepare(struct drm_crtc *crtc)
{
struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
DBG("%s", omap_crtc->name);
omap_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
}
static void omap_crtc_commit(struct drm_crtc *crtc)
{
struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
DBG("%s", omap_crtc->name);
omap_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
}
static int omap_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
struct drm_framebuffer *old_fb)
{
struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
struct drm_plane *plane = omap_crtc->plane;
struct drm_display_mode *mode = &crtc->mode;
return omap_plane_mode_set(plane, crtc, crtc->fb,
0, 0, mode->hdisplay, mode->vdisplay,
x << 16, y << 16,
mode->hdisplay << 16, mode->vdisplay << 16,
NULL, NULL);
}
static void vblank_cb(void *arg)
{
struct drm_crtc *crtc = arg;
struct drm_device *dev = crtc->dev;
struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
unsigned long flags;
spin_lock_irqsave(&dev->event_lock, flags);
/* wakeup userspace */
if (omap_crtc->event)
drm_send_vblank_event(dev, omap_crtc->pipe, omap_crtc->event);
omap_crtc->event = NULL;
omap_crtc->old_fb = NULL;
spin_unlock_irqrestore(&dev->event_lock, flags);
}
static void page_flip_worker(struct work_struct *work)
{
struct omap_crtc *omap_crtc =
container_of(work, struct omap_crtc, page_flip_work);
struct drm_crtc *crtc = &omap_crtc->base;
struct drm_display_mode *mode = &crtc->mode;
struct drm_gem_object *bo;
mutex_lock(&crtc->mutex);
omap_plane_mode_set(omap_crtc->plane, crtc, crtc->fb,
0, 0, mode->hdisplay, mode->vdisplay,
crtc->x << 16, crtc->y << 16,
mode->hdisplay << 16, mode->vdisplay << 16,
vblank_cb, crtc);
mutex_unlock(&crtc->mutex);
bo = omap_framebuffer_bo(crtc->fb, 0);
drm_gem_object_unreference_unlocked(bo);
}
static void page_flip_cb(void *arg)
{
struct drm_crtc *crtc = arg;
struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
struct omap_drm_private *priv = crtc->dev->dev_private;
/* avoid assumptions about what ctxt we are called from: */
queue_work(priv->wq, &omap_crtc->page_flip_work);
}
static int omap_crtc_page_flip_locked(struct drm_crtc *crtc,
struct drm_framebuffer *fb,
struct drm_pending_vblank_event *event)
{
struct drm_device *dev = crtc->dev;
struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
struct drm_gem_object *bo;
DBG("%d -> %d (event=%p)", crtc->fb ? crtc->fb->base.id : -1,
fb->base.id, event);
if (omap_crtc->old_fb) {
dev_err(dev->dev, "already a pending flip\n");
return -EINVAL;
}
omap_crtc->event = event;
crtc->fb = fb;
/*
* Hold a reference temporarily until the crtc is updated
* and takes the reference to the bo. This avoids it
* getting freed from under us:
*/
bo = omap_framebuffer_bo(fb, 0);
drm_gem_object_reference(bo);
omap_gem_op_async(bo, OMAP_GEM_READ, page_flip_cb, crtc);
return 0;
}
static int omap_crtc_set_property(struct drm_crtc *crtc,
struct drm_property *property, uint64_t val)
{
struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
struct omap_drm_private *priv = crtc->dev->dev_private;
if (property == priv->rotation_prop) {
crtc->invert_dimensions =
!!(val & ((1LL << DRM_ROTATE_90) | (1LL << DRM_ROTATE_270)));
}
return omap_plane_set_property(omap_crtc->plane, property, val);
}
static const struct drm_crtc_funcs omap_crtc_funcs = {
.set_config = drm_crtc_helper_set_config,
.destroy = omap_crtc_destroy,
.page_flip = omap_crtc_page_flip_locked,
.set_property = omap_crtc_set_property,
};
static const struct drm_crtc_helper_funcs omap_crtc_helper_funcs = {
.dpms = omap_crtc_dpms,
.mode_fixup = omap_crtc_mode_fixup,
.mode_set = omap_crtc_mode_set,
.prepare = omap_crtc_prepare,
.commit = omap_crtc_commit,
.mode_set_base = omap_crtc_mode_set_base,
};
const struct omap_video_timings *omap_crtc_timings(struct drm_crtc *crtc)
{
struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
return &omap_crtc->timings;
}
enum omap_channel omap_crtc_channel(struct drm_crtc *crtc)
{
struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
return omap_crtc->channel;
}
static void omap_crtc_error_irq(struct omap_drm_irq *irq, uint32_t irqstatus)
{
struct omap_crtc *omap_crtc =
container_of(irq, struct omap_crtc, error_irq);
struct drm_crtc *crtc = &omap_crtc->base;
DRM_ERROR("%s: errors: %08x\n", omap_crtc->name, irqstatus);
/* avoid getting in a flood, unregister the irq until next vblank */
omap_irq_unregister(crtc->dev, &omap_crtc->error_irq);
}
static void omap_crtc_apply_irq(struct omap_drm_irq *irq, uint32_t irqstatus)
{
struct omap_crtc *omap_crtc =
container_of(irq, struct omap_crtc, apply_irq);
struct drm_crtc *crtc = &omap_crtc->base;
if (!omap_crtc->error_irq.registered)
omap_irq_register(crtc->dev, &omap_crtc->error_irq);
if (!dispc_mgr_go_busy(omap_crtc->channel)) {
struct omap_drm_private *priv =
crtc->dev->dev_private;
DBG("%s: apply done", omap_crtc->name);
omap_irq_unregister(crtc->dev, &omap_crtc->apply_irq);
queue_work(priv->wq, &omap_crtc->apply_work);
}
}
static void apply_worker(struct work_struct *work)
{
struct omap_crtc *omap_crtc =
container_of(work, struct omap_crtc, apply_work);
struct drm_crtc *crtc = &omap_crtc->base;
struct drm_device *dev = crtc->dev;
struct omap_drm_apply *apply, *n;
bool need_apply;
/*
* Synchronize everything on mode_config.mutex, to keep
* the callbacks and list modification all serialized
* with respect to modesetting ioctls from userspace.
*/
mutex_lock(&crtc->mutex);
dispc_runtime_get();
/*
* If we are still pending a previous update, wait.. when the
* pending update completes, we get kicked again.
*/
if (omap_crtc->apply_irq.registered)
goto out;
/* finish up previous apply's: */
list_for_each_entry_safe(apply, n,
&omap_crtc->pending_applies, pending_node) {
apply->post_apply(apply);
list_del(&apply->pending_node);
}
need_apply = !list_empty(&omap_crtc->queued_applies);
/* then handle the next round of of queued apply's: */
list_for_each_entry_safe(apply, n,
&omap_crtc->queued_applies, queued_node) {
apply->pre_apply(apply);
list_del(&apply->queued_node);
apply->queued = false;
list_add_tail(&apply->pending_node,
&omap_crtc->pending_applies);
}
if (need_apply) {
enum omap_channel channel = omap_crtc->channel;
DBG("%s: GO", omap_crtc->name);
if (dispc_mgr_is_enabled(channel)) {
omap_irq_register(dev, &omap_crtc->apply_irq);
dispc_mgr_go(channel);
} else {
struct omap_drm_private *priv = dev->dev_private;
queue_work(priv->wq, &omap_crtc->apply_work);
}
}
out:
dispc_runtime_put();
mutex_unlock(&crtc->mutex);
}
int omap_crtc_apply(struct drm_crtc *crtc,
struct omap_drm_apply *apply)
{
struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
WARN_ON(!mutex_is_locked(&crtc->mutex));
/* no need to queue it again if it is already queued: */
if (apply->queued)
return 0;
apply->queued = true;
list_add_tail(&apply->queued_node, &omap_crtc->queued_applies);
/*
* If there are no currently pending updates, then go ahead and
* kick the worker immediately, otherwise it will run again when
* the current update finishes.
*/
if (list_empty(&omap_crtc->pending_applies)) {
struct omap_drm_private *priv = crtc->dev->dev_private;
queue_work(priv->wq, &omap_crtc->apply_work);
}
return 0;
}
/* called only from apply */
static void set_enabled(struct drm_crtc *crtc, bool enable)
{
struct drm_device *dev = crtc->dev;
struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
enum omap_channel channel = omap_crtc->channel;
struct omap_irq_wait *wait = NULL;
if (dispc_mgr_is_enabled(channel) == enable)
return;
/* ignore sync-lost irqs during enable/disable */
omap_irq_unregister(crtc->dev, &omap_crtc->error_irq);
if (dispc_mgr_get_framedone_irq(channel)) {
if (!enable) {
wait = omap_irq_wait_init(dev,
dispc_mgr_get_framedone_irq(channel), 1);
}
} else {
/*
* When we disable digit output, we need to wait until fields
* are done. Otherwise the DSS is still working, and turning
* off the clocks prevents DSS from going to OFF mode. And when
* enabling, we need to wait for the extra sync losts
*/
wait = omap_irq_wait_init(dev,
dispc_mgr_get_vsync_irq(channel), 2);
}
dispc_mgr_enable(channel, enable);
if (wait) {
int ret = omap_irq_wait(dev, wait, msecs_to_jiffies(100));
if (ret) {
dev_err(dev->dev, "%s: timeout waiting for %s\n",
omap_crtc->name, enable ? "enable" : "disable");
}
}
omap_irq_register(crtc->dev, &omap_crtc->error_irq);
}
static void omap_crtc_pre_apply(struct omap_drm_apply *apply)
{
struct omap_crtc *omap_crtc =
container_of(apply, struct omap_crtc, apply);
struct drm_crtc *crtc = &omap_crtc->base;
struct drm_encoder *encoder = NULL;
DBG("%s: enabled=%d, full=%d", omap_crtc->name,
omap_crtc->enabled, omap_crtc->full_update);
if (omap_crtc->full_update) {
struct omap_drm_private *priv = crtc->dev->dev_private;
int i;
for (i = 0; i < priv->num_encoders; i++) {
if (priv->encoders[i]->crtc == crtc) {
encoder = priv->encoders[i];
break;
}
}
}
if (!omap_crtc->enabled) {
set_enabled(&omap_crtc->base, false);
if (encoder)
omap_encoder_set_enabled(encoder, false);
} else {
if (encoder) {
omap_encoder_set_enabled(encoder, false);
omap_encoder_update(encoder, omap_crtc->mgr,
&omap_crtc->timings);
omap_encoder_set_enabled(encoder, true);
omap_crtc->full_update = false;
}
dispc_mgr_setup(omap_crtc->channel, &omap_crtc->info);
dispc_mgr_set_timings(omap_crtc->channel,
&omap_crtc->timings);
set_enabled(&omap_crtc->base, true);
}
omap_crtc->full_update = false;
}
static void omap_crtc_post_apply(struct omap_drm_apply *apply)
{
/* nothing needed for post-apply */
}
static const char *channel_names[] = {
[OMAP_DSS_CHANNEL_LCD] = "lcd",
[OMAP_DSS_CHANNEL_DIGIT] = "tv",
[OMAP_DSS_CHANNEL_LCD2] = "lcd2",
};
void omap_crtc_pre_init(void)
{
dss_install_mgr_ops(&mgr_ops);
}
/* initialize crtc */
struct drm_crtc *omap_crtc_init(struct drm_device *dev,
struct drm_plane *plane, enum omap_channel channel, int id)
{
struct drm_crtc *crtc = NULL;
struct omap_crtc *omap_crtc;
struct omap_overlay_manager_info *info;
DBG("%s", channel_names[channel]);
omap_crtc = kzalloc(sizeof(*omap_crtc), GFP_KERNEL);
if (!omap_crtc)
goto fail;
crtc = &omap_crtc->base;
INIT_WORK(&omap_crtc->page_flip_work, page_flip_worker);
INIT_WORK(&omap_crtc->apply_work, apply_worker);
INIT_LIST_HEAD(&omap_crtc->pending_applies);
INIT_LIST_HEAD(&omap_crtc->queued_applies);
omap_crtc->apply.pre_apply = omap_crtc_pre_apply;
omap_crtc->apply.post_apply = omap_crtc_post_apply;
omap_crtc->channel = channel;
omap_crtc->plane = plane;
omap_crtc->plane->crtc = crtc;
omap_crtc->name = channel_names[channel];
omap_crtc->pipe = id;
omap_crtc->apply_irq.irqmask = pipe2vbl(crtc);
omap_crtc->apply_irq.irq = omap_crtc_apply_irq;
omap_crtc->error_irq.irqmask =
dispc_mgr_get_sync_lost_irq(channel);
omap_crtc->error_irq.irq = omap_crtc_error_irq;
omap_irq_register(dev, &omap_crtc->error_irq);
/* temporary: */
omap_crtc->mgr = omap_dss_get_overlay_manager(channel);
/* TODO: fix hard-coded setup.. add properties! */
info = &omap_crtc->info;
info->default_color = 0x00000000;
info->trans_key = 0x00000000;
info->trans_key_type = OMAP_DSS_COLOR_KEY_GFX_DST;
info->trans_enabled = false;
drm_crtc_init(dev, crtc, &omap_crtc_funcs);
drm_crtc_helper_add(crtc, &omap_crtc_helper_funcs);
omap_plane_install_properties(omap_crtc->plane, &crtc->base);
omap_crtcs[channel] = omap_crtc;
return crtc;
fail:
if (crtc)
omap_crtc_destroy(crtc);
return NULL;
}