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

541 lines
14 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 <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_mode.h>
#include <drm/drm_plane_helper.h>
#include "omap_drv.h"
#define to_omap_crtc(x) container_of(x, struct omap_crtc, base)
struct omap_crtc {
struct drm_crtc base;
const char *name;
enum omap_channel channel;
/*
* 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;
struct omap_drm_irq vblank_irq;
struct omap_drm_irq error_irq;
bool ignore_digit_sync_lost;
bool pending;
wait_queue_head_t pending_wait;
};
/* -----------------------------------------------------------------------------
* Helper Functions
*/
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);
}
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;
}
int omap_crtc_wait_pending(struct drm_crtc *crtc)
{
struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
return wait_event_timeout(omap_crtc->pending_wait,
!omap_crtc->pending,
msecs_to_jiffies(50));
}
/* -----------------------------------------------------------------------------
* DSS Manager Functions
*/
/*
* 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_dss_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_dss_disconnect(struct omap_overlay_manager *mgr,
struct omap_dss_device *dst)
{
mgr->output->manager = NULL;
mgr->output = NULL;
}
static void omap_crtc_dss_start_update(struct omap_overlay_manager *mgr)
{
}
/* Called only from the encoder enable/disable and suspend/resume handlers. */
static void omap_crtc_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;
u32 framedone_irq, vsync_irq;
int ret;
if (dispc_mgr_is_enabled(channel) == enable)
return;
if (omap_crtc->channel == OMAP_DSS_CHANNEL_DIGIT) {
/*
* Digit output produces some sync lost interrupts during the
* first frame when enabling, so we need to ignore those.
*/
omap_crtc->ignore_digit_sync_lost = true;
}
framedone_irq = dispc_mgr_get_framedone_irq(channel);
vsync_irq = dispc_mgr_get_vsync_irq(channel);
if (enable) {
wait = omap_irq_wait_init(dev, vsync_irq, 1);
} else {
/*
* When we disable the digit output, we need to wait for
* FRAMEDONE to know that DISPC has finished with the output.
*
* OMAP2/3 does not have FRAMEDONE irq for digit output, and in
* that case we need to use vsync interrupt, and wait for both
* even and odd frames.
*/
if (framedone_irq)
wait = omap_irq_wait_init(dev, framedone_irq, 1);
else
wait = omap_irq_wait_init(dev, vsync_irq, 2);
}
dispc_mgr_enable(channel, enable);
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");
}
if (omap_crtc->channel == OMAP_DSS_CHANNEL_DIGIT) {
omap_crtc->ignore_digit_sync_lost = false;
/* make sure the irq handler sees the value above */
mb();
}
}
static int omap_crtc_dss_enable(struct omap_overlay_manager *mgr)
{
struct omap_crtc *omap_crtc = omap_crtcs[mgr->id];
struct omap_overlay_manager_info info;
memset(&info, 0, sizeof(info));
info.default_color = 0x00000000;
info.trans_key = 0x00000000;
info.trans_key_type = OMAP_DSS_COLOR_KEY_GFX_DST;
info.trans_enabled = false;
dispc_mgr_setup(omap_crtc->channel, &info);
dispc_mgr_set_timings(omap_crtc->channel,
&omap_crtc->timings);
omap_crtc_set_enabled(&omap_crtc->base, true);
return 0;
}
static void omap_crtc_dss_disable(struct omap_overlay_manager *mgr)
{
struct omap_crtc *omap_crtc = omap_crtcs[mgr->id];
omap_crtc_set_enabled(&omap_crtc->base, false);
}
static void omap_crtc_dss_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;
}
static void omap_crtc_dss_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_dss_register_framedone(
struct omap_overlay_manager *mgr,
void (*handler)(void *), void *data)
{
return 0;
}
static void omap_crtc_dss_unregister_framedone(
struct omap_overlay_manager *mgr,
void (*handler)(void *), void *data)
{
}
static const struct dss_mgr_ops mgr_ops = {
.connect = omap_crtc_dss_connect,
.disconnect = omap_crtc_dss_disconnect,
.start_update = omap_crtc_dss_start_update,
.enable = omap_crtc_dss_enable,
.disable = omap_crtc_dss_disable,
.set_timings = omap_crtc_dss_set_timings,
.set_lcd_config = omap_crtc_dss_set_lcd_config,
.register_framedone_handler = omap_crtc_dss_register_framedone,
.unregister_framedone_handler = omap_crtc_dss_unregister_framedone,
};
/* -----------------------------------------------------------------------------
* Setup, Flush and Page Flip
*/
static void omap_crtc_complete_page_flip(struct drm_crtc *crtc)
{
struct drm_pending_vblank_event *event;
struct drm_device *dev = crtc->dev;
unsigned long flags;
event = crtc->state->event;
if (!event)
return;
spin_lock_irqsave(&dev->event_lock, flags);
list_del(&event->base.link);
/*
* Queue the event for delivery if it's still linked to a file
* handle, otherwise just destroy it.
*/
if (event->base.file_priv)
drm_crtc_send_vblank_event(crtc, event);
else
event->base.destroy(&event->base);
spin_unlock_irqrestore(&dev->event_lock, flags);
}
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);
if (omap_crtc->ignore_digit_sync_lost) {
irqstatus &= ~DISPC_IRQ_SYNC_LOST_DIGIT;
if (!irqstatus)
return;
}
DRM_ERROR_RATELIMITED("%s: errors: %08x\n", omap_crtc->name, irqstatus);
}
static void omap_crtc_vblank_irq(struct omap_drm_irq *irq, uint32_t irqstatus)
{
struct omap_crtc *omap_crtc =
container_of(irq, struct omap_crtc, vblank_irq);
struct drm_device *dev = omap_crtc->base.dev;
if (dispc_mgr_go_busy(omap_crtc->channel))
return;
DBG("%s: apply done", omap_crtc->name);
__omap_irq_unregister(dev, &omap_crtc->vblank_irq);
rmb();
WARN_ON(!omap_crtc->pending);
omap_crtc->pending = false;
wmb();
/* wake up userspace */
omap_crtc_complete_page_flip(&omap_crtc->base);
/* wake up omap_atomic_complete */
wake_up(&omap_crtc->pending_wait);
}
/* -----------------------------------------------------------------------------
* CRTC Functions
*/
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->vblank_irq.registered);
omap_irq_unregister(crtc->dev, &omap_crtc->error_irq);
drm_crtc_cleanup(crtc);
kfree(omap_crtc);
}
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 void omap_crtc_enable(struct drm_crtc *crtc)
{
struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
DBG("%s", omap_crtc->name);
rmb();
WARN_ON(omap_crtc->pending);
omap_crtc->pending = true;
wmb();
omap_irq_register(crtc->dev, &omap_crtc->vblank_irq);
drm_crtc_vblank_on(crtc);
}
static void omap_crtc_disable(struct drm_crtc *crtc)
{
struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
DBG("%s", omap_crtc->name);
drm_crtc_vblank_off(crtc);
}
static void omap_crtc_mode_set_nofb(struct drm_crtc *crtc)
{
struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
struct drm_display_mode *mode = &crtc->state->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);
}
static void omap_crtc_atomic_begin(struct drm_crtc *crtc,
struct drm_crtc_state *old_crtc_state)
{
}
static void omap_crtc_atomic_flush(struct drm_crtc *crtc,
struct drm_crtc_state *old_crtc_state)
{
struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
WARN_ON(omap_crtc->vblank_irq.registered);
if (dispc_mgr_is_enabled(omap_crtc->channel)) {
DBG("%s: GO", omap_crtc->name);
rmb();
WARN_ON(omap_crtc->pending);
omap_crtc->pending = true;
wmb();
dispc_mgr_go(omap_crtc->channel);
omap_irq_register(crtc->dev, &omap_crtc->vblank_irq);
}
}
static int omap_crtc_atomic_set_property(struct drm_crtc *crtc,
struct drm_crtc_state *state,
struct drm_property *property,
uint64_t val)
{
struct drm_plane_state *plane_state;
struct drm_plane *plane = crtc->primary;
/*
* Delegate property set to the primary plane. Get the plane state and
* set the property directly.
*/
plane_state = drm_atomic_get_plane_state(state->state, plane);
if (!plane_state)
return -EINVAL;
return drm_atomic_plane_set_property(plane, plane_state, property, val);
}
static int omap_crtc_atomic_get_property(struct drm_crtc *crtc,
const struct drm_crtc_state *state,
struct drm_property *property,
uint64_t *val)
{
/*
* Delegate property get to the primary plane. The
* drm_atomic_plane_get_property() function isn't exported, but can be
* called through drm_object_property_get_value() as that will call
* drm_atomic_get_property() for atomic drivers.
*/
return drm_object_property_get_value(&crtc->primary->base, property,
val);
}
static const struct drm_crtc_funcs omap_crtc_funcs = {
.reset = drm_atomic_helper_crtc_reset,
.set_config = drm_atomic_helper_set_config,
.destroy = omap_crtc_destroy,
.page_flip = drm_atomic_helper_page_flip,
.set_property = drm_atomic_helper_crtc_set_property,
.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
.atomic_set_property = omap_crtc_atomic_set_property,
.atomic_get_property = omap_crtc_atomic_get_property,
};
static const struct drm_crtc_helper_funcs omap_crtc_helper_funcs = {
.mode_fixup = omap_crtc_mode_fixup,
.mode_set_nofb = omap_crtc_mode_set_nofb,
.disable = omap_crtc_disable,
.enable = omap_crtc_enable,
.atomic_begin = omap_crtc_atomic_begin,
.atomic_flush = omap_crtc_atomic_flush,
};
/* -----------------------------------------------------------------------------
* Init and Cleanup
*/
static const char *channel_names[] = {
[OMAP_DSS_CHANNEL_LCD] = "lcd",
[OMAP_DSS_CHANNEL_DIGIT] = "tv",
[OMAP_DSS_CHANNEL_LCD2] = "lcd2",
[OMAP_DSS_CHANNEL_LCD3] = "lcd3",
};
void omap_crtc_pre_init(void)
{
dss_install_mgr_ops(&mgr_ops);
}
void omap_crtc_pre_uninit(void)
{
dss_uninstall_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;
int ret;
DBG("%s", channel_names[channel]);
omap_crtc = kzalloc(sizeof(*omap_crtc), GFP_KERNEL);
if (!omap_crtc)
return NULL;
crtc = &omap_crtc->base;
init_waitqueue_head(&omap_crtc->pending_wait);
omap_crtc->channel = channel;
omap_crtc->name = channel_names[channel];
omap_crtc->vblank_irq.irqmask = pipe2vbl(crtc);
omap_crtc->vblank_irq.irq = omap_crtc_vblank_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);
ret = drm_crtc_init_with_planes(dev, crtc, plane, NULL,
&omap_crtc_funcs);
if (ret < 0) {
kfree(omap_crtc);
return NULL;
}
drm_crtc_helper_add(crtc, &omap_crtc_helper_funcs);
omap_plane_install_properties(crtc->primary, &crtc->base);
omap_crtcs[channel] = omap_crtc;
return crtc;
}