blob: 0fefc68372b93ca326b9c194f4529fd201b6161c [file] [log] [blame]
/*
* Copyright (C) 2011 Texas Instruments
* Author: Tomi Valkeinen <tomi.valkeinen@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/>.
*/
#define DSS_SUBSYS_NAME "APPLY"
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/jiffies.h>
#include <video/omapdss.h>
#include "dss.h"
#include "dss_features.h"
/*
* We have 4 levels of cache for the dispc settings. First two are in SW and
* the latter two in HW.
*
* set_info()
* v
* +--------------------+
* | user_info |
* +--------------------+
* v
* apply()
* v
* +--------------------+
* | info |
* +--------------------+
* v
* write_regs()
* v
* +--------------------+
* | shadow registers |
* +--------------------+
* v
* VFP or lcd/digit_enable
* v
* +--------------------+
* | registers |
* +--------------------+
*/
struct ovl_priv_data {
bool user_info_dirty;
struct omap_overlay_info user_info;
bool info_dirty;
struct omap_overlay_info info;
bool shadow_info_dirty;
bool extra_info_dirty;
bool shadow_extra_info_dirty;
bool enabled;
enum omap_channel channel;
u32 fifo_low, fifo_high;
/*
* True if overlay is to be enabled. Used to check and calculate configs
* for the overlay before it is enabled in the HW.
*/
bool enabling;
};
struct mgr_priv_data {
bool user_info_dirty;
struct omap_overlay_manager_info user_info;
bool info_dirty;
struct omap_overlay_manager_info info;
bool shadow_info_dirty;
/* If true, GO bit is up and shadow registers cannot be written.
* Never true for manual update displays */
bool busy;
/* If true, dispc output is enabled */
bool updating;
/* If true, a display is enabled using this manager */
bool enabled;
bool extra_info_dirty;
bool shadow_extra_info_dirty;
struct omap_video_timings timings;
struct dss_lcd_mgr_config lcd_config;
};
static struct {
struct ovl_priv_data ovl_priv_data_array[MAX_DSS_OVERLAYS];
struct mgr_priv_data mgr_priv_data_array[MAX_DSS_MANAGERS];
bool fifo_merge_dirty;
bool fifo_merge;
bool irq_enabled;
} dss_data;
/* protects dss_data */
static spinlock_t data_lock;
/* lock for blocking functions */
static DEFINE_MUTEX(apply_lock);
static DECLARE_COMPLETION(extra_updated_completion);
static void dss_register_vsync_isr(void);
static struct ovl_priv_data *get_ovl_priv(struct omap_overlay *ovl)
{
return &dss_data.ovl_priv_data_array[ovl->id];
}
static struct mgr_priv_data *get_mgr_priv(struct omap_overlay_manager *mgr)
{
return &dss_data.mgr_priv_data_array[mgr->id];
}
void dss_apply_init(void)
{
const int num_ovls = dss_feat_get_num_ovls();
struct mgr_priv_data *mp;
int i;
spin_lock_init(&data_lock);
for (i = 0; i < num_ovls; ++i) {
struct ovl_priv_data *op;
op = &dss_data.ovl_priv_data_array[i];
op->info.global_alpha = 255;
switch (i) {
case 0:
op->info.zorder = 0;
break;
case 1:
op->info.zorder =
dss_has_feature(FEAT_ALPHA_FREE_ZORDER) ? 3 : 0;
break;
case 2:
op->info.zorder =
dss_has_feature(FEAT_ALPHA_FREE_ZORDER) ? 2 : 0;
break;
case 3:
op->info.zorder =
dss_has_feature(FEAT_ALPHA_FREE_ZORDER) ? 1 : 0;
break;
}
op->user_info = op->info;
}
/*
* Initialize some of the lcd_config fields for TV manager, this lets
* us prevent checking if the manager is LCD or TV at some places
*/
mp = &dss_data.mgr_priv_data_array[OMAP_DSS_CHANNEL_DIGIT];
mp->lcd_config.video_port_width = 24;
mp->lcd_config.clock_info.lck_div = 1;
mp->lcd_config.clock_info.pck_div = 1;
}
/*
* A LCD manager's stallmode decides whether it is in manual or auto update. TV
* manager is always auto update, stallmode field for TV manager is false by
* default
*/
static bool ovl_manual_update(struct omap_overlay *ovl)
{
struct mgr_priv_data *mp = get_mgr_priv(ovl->manager);
return mp->lcd_config.stallmode;
}
static bool mgr_manual_update(struct omap_overlay_manager *mgr)
{
struct mgr_priv_data *mp = get_mgr_priv(mgr);
return mp->lcd_config.stallmode;
}
static int dss_check_settings_low(struct omap_overlay_manager *mgr,
bool applying)
{
struct omap_overlay_info *oi;
struct omap_overlay_manager_info *mi;
struct omap_overlay *ovl;
struct omap_overlay_info *ois[MAX_DSS_OVERLAYS];
struct ovl_priv_data *op;
struct mgr_priv_data *mp;
mp = get_mgr_priv(mgr);
if (!mp->enabled)
return 0;
if (applying && mp->user_info_dirty)
mi = &mp->user_info;
else
mi = &mp->info;
/* collect the infos to be tested into the array */
list_for_each_entry(ovl, &mgr->overlays, list) {
op = get_ovl_priv(ovl);
if (!op->enabled && !op->enabling)
oi = NULL;
else if (applying && op->user_info_dirty)
oi = &op->user_info;
else
oi = &op->info;
ois[ovl->id] = oi;
}
return dss_mgr_check(mgr, mi, &mp->timings, &mp->lcd_config, ois);
}
/*
* check manager and overlay settings using overlay_info from data->info
*/
static int dss_check_settings(struct omap_overlay_manager *mgr)
{
return dss_check_settings_low(mgr, false);
}
/*
* check manager and overlay settings using overlay_info from ovl->info if
* dirty and from data->info otherwise
*/
static int dss_check_settings_apply(struct omap_overlay_manager *mgr)
{
return dss_check_settings_low(mgr, true);
}
static bool need_isr(void)
{
const int num_mgrs = dss_feat_get_num_mgrs();
int i;
for (i = 0; i < num_mgrs; ++i) {
struct omap_overlay_manager *mgr;
struct mgr_priv_data *mp;
struct omap_overlay *ovl;
mgr = omap_dss_get_overlay_manager(i);
mp = get_mgr_priv(mgr);
if (!mp->enabled)
continue;
if (mgr_manual_update(mgr)) {
/* to catch FRAMEDONE */
if (mp->updating)
return true;
} else {
/* to catch GO bit going down */
if (mp->busy)
return true;
/* to write new values to registers */
if (mp->info_dirty)
return true;
/* to set GO bit */
if (mp->shadow_info_dirty)
return true;
/*
* NOTE: we don't check extra_info flags for disabled
* managers, once the manager is enabled, the extra_info
* related manager changes will be taken in by HW.
*/
/* to write new values to registers */
if (mp->extra_info_dirty)
return true;
/* to set GO bit */
if (mp->shadow_extra_info_dirty)
return true;
list_for_each_entry(ovl, &mgr->overlays, list) {
struct ovl_priv_data *op;
op = get_ovl_priv(ovl);
/*
* NOTE: we check extra_info flags even for
* disabled overlays, as extra_infos need to be
* always written.
*/
/* to write new values to registers */
if (op->extra_info_dirty)
return true;
/* to set GO bit */
if (op->shadow_extra_info_dirty)
return true;
if (!op->enabled)
continue;
/* to write new values to registers */
if (op->info_dirty)
return true;
/* to set GO bit */
if (op->shadow_info_dirty)
return true;
}
}
}
return false;
}
static bool need_go(struct omap_overlay_manager *mgr)
{
struct omap_overlay *ovl;
struct mgr_priv_data *mp;
struct ovl_priv_data *op;
mp = get_mgr_priv(mgr);
if (mp->shadow_info_dirty || mp->shadow_extra_info_dirty)
return true;
list_for_each_entry(ovl, &mgr->overlays, list) {
op = get_ovl_priv(ovl);
if (op->shadow_info_dirty || op->shadow_extra_info_dirty)
return true;
}
return false;
}
/* returns true if an extra_info field is currently being updated */
static bool extra_info_update_ongoing(void)
{
const int num_mgrs = dss_feat_get_num_mgrs();
int i;
for (i = 0; i < num_mgrs; ++i) {
struct omap_overlay_manager *mgr;
struct omap_overlay *ovl;
struct mgr_priv_data *mp;
mgr = omap_dss_get_overlay_manager(i);
mp = get_mgr_priv(mgr);
if (!mp->enabled)
continue;
if (!mp->updating)
continue;
if (mp->extra_info_dirty || mp->shadow_extra_info_dirty)
return true;
list_for_each_entry(ovl, &mgr->overlays, list) {
struct ovl_priv_data *op = get_ovl_priv(ovl);
if (op->extra_info_dirty || op->shadow_extra_info_dirty)
return true;
}
}
return false;
}
/* wait until no extra_info updates are pending */
static void wait_pending_extra_info_updates(void)
{
bool updating;
unsigned long flags;
unsigned long t;
int r;
spin_lock_irqsave(&data_lock, flags);
updating = extra_info_update_ongoing();
if (!updating) {
spin_unlock_irqrestore(&data_lock, flags);
return;
}
init_completion(&extra_updated_completion);
spin_unlock_irqrestore(&data_lock, flags);
t = msecs_to_jiffies(500);
r = wait_for_completion_timeout(&extra_updated_completion, t);
if (r == 0)
DSSWARN("timeout in wait_pending_extra_info_updates\n");
else if (r < 0)
DSSERR("wait_pending_extra_info_updates failed: %d\n", r);
}
int dss_mgr_wait_for_go(struct omap_overlay_manager *mgr)
{
unsigned long timeout = msecs_to_jiffies(500);
struct mgr_priv_data *mp;
u32 irq;
int r;
int i;
struct omap_dss_device *dssdev = mgr->device;
if (!dssdev || dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
return 0;
if (mgr_manual_update(mgr))
return 0;
r = dispc_runtime_get();
if (r)
return r;
irq = dispc_mgr_get_vsync_irq(mgr->id);
mp = get_mgr_priv(mgr);
i = 0;
while (1) {
unsigned long flags;
bool shadow_dirty, dirty;
spin_lock_irqsave(&data_lock, flags);
dirty = mp->info_dirty;
shadow_dirty = mp->shadow_info_dirty;
spin_unlock_irqrestore(&data_lock, flags);
if (!dirty && !shadow_dirty) {
r = 0;
break;
}
/* 4 iterations is the worst case:
* 1 - initial iteration, dirty = true (between VFP and VSYNC)
* 2 - first VSYNC, dirty = true
* 3 - dirty = false, shadow_dirty = true
* 4 - shadow_dirty = false */
if (i++ == 3) {
DSSERR("mgr(%d)->wait_for_go() not finishing\n",
mgr->id);
r = 0;
break;
}
r = omap_dispc_wait_for_irq_interruptible_timeout(irq, timeout);
if (r == -ERESTARTSYS)
break;
if (r) {
DSSERR("mgr(%d)->wait_for_go() timeout\n", mgr->id);
break;
}
}
dispc_runtime_put();
return r;
}
int dss_mgr_wait_for_go_ovl(struct omap_overlay *ovl)
{
unsigned long timeout = msecs_to_jiffies(500);
struct ovl_priv_data *op;
struct omap_dss_device *dssdev;
u32 irq;
int r;
int i;
if (!ovl->manager)
return 0;
dssdev = ovl->manager->device;
if (!dssdev || dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
return 0;
if (ovl_manual_update(ovl))
return 0;
r = dispc_runtime_get();
if (r)
return r;
irq = dispc_mgr_get_vsync_irq(ovl->manager->id);
op = get_ovl_priv(ovl);
i = 0;
while (1) {
unsigned long flags;
bool shadow_dirty, dirty;
spin_lock_irqsave(&data_lock, flags);
dirty = op->info_dirty;
shadow_dirty = op->shadow_info_dirty;
spin_unlock_irqrestore(&data_lock, flags);
if (!dirty && !shadow_dirty) {
r = 0;
break;
}
/* 4 iterations is the worst case:
* 1 - initial iteration, dirty = true (between VFP and VSYNC)
* 2 - first VSYNC, dirty = true
* 3 - dirty = false, shadow_dirty = true
* 4 - shadow_dirty = false */
if (i++ == 3) {
DSSERR("ovl(%d)->wait_for_go() not finishing\n",
ovl->id);
r = 0;
break;
}
r = omap_dispc_wait_for_irq_interruptible_timeout(irq, timeout);
if (r == -ERESTARTSYS)
break;
if (r) {
DSSERR("ovl(%d)->wait_for_go() timeout\n", ovl->id);
break;
}
}
dispc_runtime_put();
return r;
}
static void dss_ovl_write_regs(struct omap_overlay *ovl)
{
struct ovl_priv_data *op = get_ovl_priv(ovl);
struct omap_overlay_info *oi;
bool replication;
struct mgr_priv_data *mp;
int r;
DSSDBGF("%d", ovl->id);
if (!op->enabled || !op->info_dirty)
return;
oi = &op->info;
mp = get_mgr_priv(ovl->manager);
replication = dss_ovl_use_replication(mp->lcd_config, oi->color_mode);
r = dispc_ovl_setup(ovl->id, oi, replication, &mp->timings);
if (r) {
/*
* We can't do much here, as this function can be called from
* vsync interrupt.
*/
DSSERR("dispc_ovl_setup failed for ovl %d\n", ovl->id);
/* This will leave fifo configurations in a nonoptimal state */
op->enabled = false;
dispc_ovl_enable(ovl->id, false);
return;
}
op->info_dirty = false;
if (mp->updating)
op->shadow_info_dirty = true;
}
static void dss_ovl_write_regs_extra(struct omap_overlay *ovl)
{
struct ovl_priv_data *op = get_ovl_priv(ovl);
struct mgr_priv_data *mp;
DSSDBGF("%d", ovl->id);
if (!op->extra_info_dirty)
return;
/* note: write also when op->enabled == false, so that the ovl gets
* disabled */
dispc_ovl_enable(ovl->id, op->enabled);
dispc_ovl_set_channel_out(ovl->id, op->channel);
dispc_ovl_set_fifo_threshold(ovl->id, op->fifo_low, op->fifo_high);
mp = get_mgr_priv(ovl->manager);
op->extra_info_dirty = false;
if (mp->updating)
op->shadow_extra_info_dirty = true;
}
static void dss_mgr_write_regs(struct omap_overlay_manager *mgr)
{
struct mgr_priv_data *mp = get_mgr_priv(mgr);
struct omap_overlay *ovl;
DSSDBGF("%d", mgr->id);
if (!mp->enabled)
return;
WARN_ON(mp->busy);
/* Commit overlay settings */
list_for_each_entry(ovl, &mgr->overlays, list) {
dss_ovl_write_regs(ovl);
dss_ovl_write_regs_extra(ovl);
}
if (mp->info_dirty) {
dispc_mgr_setup(mgr->id, &mp->info);
mp->info_dirty = false;
if (mp->updating)
mp->shadow_info_dirty = true;
}
}
static void dss_mgr_write_regs_extra(struct omap_overlay_manager *mgr)
{
struct mgr_priv_data *mp = get_mgr_priv(mgr);
DSSDBGF("%d", mgr->id);
if (!mp->extra_info_dirty)
return;
dispc_mgr_set_timings(mgr->id, &mp->timings);
/* lcd_config parameters */
if (dss_mgr_is_lcd(mgr->id)) {
dispc_mgr_set_io_pad_mode(mp->lcd_config.io_pad_mode);
dispc_mgr_enable_stallmode(mgr->id, mp->lcd_config.stallmode);
dispc_mgr_enable_fifohandcheck(mgr->id,
mp->lcd_config.fifohandcheck);
dispc_mgr_set_clock_div(mgr->id, &mp->lcd_config.clock_info);
dispc_mgr_set_tft_data_lines(mgr->id,
mp->lcd_config.video_port_width);
dispc_lcd_enable_signal_polarity(mp->lcd_config.lcden_sig_polarity);
dispc_mgr_set_lcd_type_tft(mgr->id);
}
mp->extra_info_dirty = false;
if (mp->updating)
mp->shadow_extra_info_dirty = true;
}
static void dss_write_regs_common(void)
{
const int num_mgrs = omap_dss_get_num_overlay_managers();
int i;
if (!dss_data.fifo_merge_dirty)
return;
for (i = 0; i < num_mgrs; ++i) {
struct omap_overlay_manager *mgr;
struct mgr_priv_data *mp;
mgr = omap_dss_get_overlay_manager(i);
mp = get_mgr_priv(mgr);
if (mp->enabled) {
if (dss_data.fifo_merge_dirty) {
dispc_enable_fifomerge(dss_data.fifo_merge);
dss_data.fifo_merge_dirty = false;
}
if (mp->updating)
mp->shadow_info_dirty = true;
}
}
}
static void dss_write_regs(void)
{
const int num_mgrs = omap_dss_get_num_overlay_managers();
int i;
dss_write_regs_common();
for (i = 0; i < num_mgrs; ++i) {
struct omap_overlay_manager *mgr;
struct mgr_priv_data *mp;
int r;
mgr = omap_dss_get_overlay_manager(i);
mp = get_mgr_priv(mgr);
if (!mp->enabled || mgr_manual_update(mgr) || mp->busy)
continue;
r = dss_check_settings(mgr);
if (r) {
DSSERR("cannot write registers for manager %s: "
"illegal configuration\n", mgr->name);
continue;
}
dss_mgr_write_regs(mgr);
dss_mgr_write_regs_extra(mgr);
}
}
static void dss_set_go_bits(void)
{
const int num_mgrs = omap_dss_get_num_overlay_managers();
int i;
for (i = 0; i < num_mgrs; ++i) {
struct omap_overlay_manager *mgr;
struct mgr_priv_data *mp;
mgr = omap_dss_get_overlay_manager(i);
mp = get_mgr_priv(mgr);
if (!mp->enabled || mgr_manual_update(mgr) || mp->busy)
continue;
if (!need_go(mgr))
continue;
mp->busy = true;
if (!dss_data.irq_enabled && need_isr())
dss_register_vsync_isr();
dispc_mgr_go(mgr->id);
}
}
static void mgr_clear_shadow_dirty(struct omap_overlay_manager *mgr)
{
struct omap_overlay *ovl;
struct mgr_priv_data *mp;
struct ovl_priv_data *op;
mp = get_mgr_priv(mgr);
mp->shadow_info_dirty = false;
mp->shadow_extra_info_dirty = false;
list_for_each_entry(ovl, &mgr->overlays, list) {
op = get_ovl_priv(ovl);
op->shadow_info_dirty = false;
op->shadow_extra_info_dirty = false;
}
}
void dss_mgr_start_update(struct omap_overlay_manager *mgr)
{
struct mgr_priv_data *mp = get_mgr_priv(mgr);
unsigned long flags;
int r;
spin_lock_irqsave(&data_lock, flags);
WARN_ON(mp->updating);
r = dss_check_settings(mgr);
if (r) {
DSSERR("cannot start manual update: illegal configuration\n");
spin_unlock_irqrestore(&data_lock, flags);
return;
}
dss_mgr_write_regs(mgr);
dss_mgr_write_regs_extra(mgr);
dss_write_regs_common();
mp->updating = true;
if (!dss_data.irq_enabled && need_isr())
dss_register_vsync_isr();
dispc_mgr_enable(mgr->id, true);
mgr_clear_shadow_dirty(mgr);
spin_unlock_irqrestore(&data_lock, flags);
}
static void dss_apply_irq_handler(void *data, u32 mask);
static void dss_register_vsync_isr(void)
{
const int num_mgrs = dss_feat_get_num_mgrs();
u32 mask;
int r, i;
mask = 0;
for (i = 0; i < num_mgrs; ++i)
mask |= dispc_mgr_get_vsync_irq(i);
for (i = 0; i < num_mgrs; ++i)
mask |= dispc_mgr_get_framedone_irq(i);
r = omap_dispc_register_isr(dss_apply_irq_handler, NULL, mask);
WARN_ON(r);
dss_data.irq_enabled = true;
}
static void dss_unregister_vsync_isr(void)
{
const int num_mgrs = dss_feat_get_num_mgrs();
u32 mask;
int r, i;
mask = 0;
for (i = 0; i < num_mgrs; ++i)
mask |= dispc_mgr_get_vsync_irq(i);
for (i = 0; i < num_mgrs; ++i)
mask |= dispc_mgr_get_framedone_irq(i);
r = omap_dispc_unregister_isr(dss_apply_irq_handler, NULL, mask);
WARN_ON(r);
dss_data.irq_enabled = false;
}
static void dss_apply_irq_handler(void *data, u32 mask)
{
const int num_mgrs = dss_feat_get_num_mgrs();
int i;
bool extra_updating;
spin_lock(&data_lock);
/* clear busy, updating flags, shadow_dirty flags */
for (i = 0; i < num_mgrs; i++) {
struct omap_overlay_manager *mgr;
struct mgr_priv_data *mp;
bool was_updating;
mgr = omap_dss_get_overlay_manager(i);
mp = get_mgr_priv(mgr);
if (!mp->enabled)
continue;
was_updating = mp->updating;
mp->updating = dispc_mgr_is_enabled(i);
if (!mgr_manual_update(mgr)) {
bool was_busy = mp->busy;
mp->busy = dispc_mgr_go_busy(i);
if (was_busy && !mp->busy)
mgr_clear_shadow_dirty(mgr);
}
}
dss_write_regs();
dss_set_go_bits();
extra_updating = extra_info_update_ongoing();
if (!extra_updating)
complete_all(&extra_updated_completion);
if (!need_isr())
dss_unregister_vsync_isr();
spin_unlock(&data_lock);
}
static void omap_dss_mgr_apply_ovl(struct omap_overlay *ovl)
{
struct ovl_priv_data *op;
op = get_ovl_priv(ovl);
if (!op->user_info_dirty)
return;
op->user_info_dirty = false;
op->info_dirty = true;
op->info = op->user_info;
}
static void omap_dss_mgr_apply_mgr(struct omap_overlay_manager *mgr)
{
struct mgr_priv_data *mp;
mp = get_mgr_priv(mgr);
if (!mp->user_info_dirty)
return;
mp->user_info_dirty = false;
mp->info_dirty = true;
mp->info = mp->user_info;
}
int omap_dss_mgr_apply(struct omap_overlay_manager *mgr)
{
unsigned long flags;
struct omap_overlay *ovl;
int r;
DSSDBG("omap_dss_mgr_apply(%s)\n", mgr->name);
spin_lock_irqsave(&data_lock, flags);
r = dss_check_settings_apply(mgr);
if (r) {
spin_unlock_irqrestore(&data_lock, flags);
DSSERR("failed to apply settings: illegal configuration.\n");
return r;
}
/* Configure overlays */
list_for_each_entry(ovl, &mgr->overlays, list)
omap_dss_mgr_apply_ovl(ovl);
/* Configure manager */
omap_dss_mgr_apply_mgr(mgr);
dss_write_regs();
dss_set_go_bits();
spin_unlock_irqrestore(&data_lock, flags);
return 0;
}
static void dss_apply_ovl_enable(struct omap_overlay *ovl, bool enable)
{
struct ovl_priv_data *op;
op = get_ovl_priv(ovl);
if (op->enabled == enable)
return;
op->enabled = enable;
op->extra_info_dirty = true;
}
static void dss_apply_ovl_fifo_thresholds(struct omap_overlay *ovl,
u32 fifo_low, u32 fifo_high)
{
struct ovl_priv_data *op = get_ovl_priv(ovl);
if (op->fifo_low == fifo_low && op->fifo_high == fifo_high)
return;
op->fifo_low = fifo_low;
op->fifo_high = fifo_high;
op->extra_info_dirty = true;
}
static void dss_apply_fifo_merge(bool use_fifo_merge)
{
if (dss_data.fifo_merge == use_fifo_merge)
return;
dss_data.fifo_merge = use_fifo_merge;
dss_data.fifo_merge_dirty = true;
}
static void dss_ovl_setup_fifo(struct omap_overlay *ovl,
bool use_fifo_merge)
{
struct ovl_priv_data *op = get_ovl_priv(ovl);
u32 fifo_low, fifo_high;
if (!op->enabled && !op->enabling)
return;
dispc_ovl_compute_fifo_thresholds(ovl->id, &fifo_low, &fifo_high,
use_fifo_merge, ovl_manual_update(ovl));
dss_apply_ovl_fifo_thresholds(ovl, fifo_low, fifo_high);
}
static void dss_mgr_setup_fifos(struct omap_overlay_manager *mgr,
bool use_fifo_merge)
{
struct omap_overlay *ovl;
struct mgr_priv_data *mp;
mp = get_mgr_priv(mgr);
if (!mp->enabled)
return;
list_for_each_entry(ovl, &mgr->overlays, list)
dss_ovl_setup_fifo(ovl, use_fifo_merge);
}
static void dss_setup_fifos(bool use_fifo_merge)
{
const int num_mgrs = omap_dss_get_num_overlay_managers();
struct omap_overlay_manager *mgr;
int i;
for (i = 0; i < num_mgrs; ++i) {
mgr = omap_dss_get_overlay_manager(i);
dss_mgr_setup_fifos(mgr, use_fifo_merge);
}
}
static int get_num_used_managers(void)
{
const int num_mgrs = omap_dss_get_num_overlay_managers();
struct omap_overlay_manager *mgr;
struct mgr_priv_data *mp;
int i;
int enabled_mgrs;
enabled_mgrs = 0;
for (i = 0; i < num_mgrs; ++i) {
mgr = omap_dss_get_overlay_manager(i);
mp = get_mgr_priv(mgr);
if (!mp->enabled)
continue;
enabled_mgrs++;
}
return enabled_mgrs;
}
static int get_num_used_overlays(void)
{
const int num_ovls = omap_dss_get_num_overlays();
struct omap_overlay *ovl;
struct ovl_priv_data *op;
struct mgr_priv_data *mp;
int i;
int enabled_ovls;
enabled_ovls = 0;
for (i = 0; i < num_ovls; ++i) {
ovl = omap_dss_get_overlay(i);
op = get_ovl_priv(ovl);
if (!op->enabled && !op->enabling)
continue;
mp = get_mgr_priv(ovl->manager);
if (!mp->enabled)
continue;
enabled_ovls++;
}
return enabled_ovls;
}
static bool get_use_fifo_merge(void)
{
int enabled_mgrs = get_num_used_managers();
int enabled_ovls = get_num_used_overlays();
if (!dss_has_feature(FEAT_FIFO_MERGE))
return false;
/*
* In theory the only requirement for fifomerge is enabled_ovls <= 1.
* However, if we have two managers enabled and set/unset the fifomerge,
* we need to set the GO bits in particular sequence for the managers,
* and wait in between.
*
* This is rather difficult as new apply calls can happen at any time,
* so we simplify the problem by requiring also that enabled_mgrs <= 1.
* In practice this shouldn't matter, because when only one overlay is
* enabled, most likely only one output is enabled.
*/
return enabled_mgrs <= 1 && enabled_ovls <= 1;
}
int dss_mgr_enable(struct omap_overlay_manager *mgr)
{
struct mgr_priv_data *mp = get_mgr_priv(mgr);
unsigned long flags;
int r;
bool fifo_merge;
mutex_lock(&apply_lock);
if (mp->enabled)
goto out;
spin_lock_irqsave(&data_lock, flags);
mp->enabled = true;
r = dss_check_settings(mgr);
if (r) {
DSSERR("failed to enable manager %d: check_settings failed\n",
mgr->id);
goto err;
}
/* step 1: setup fifos/fifomerge before enabling the manager */
fifo_merge = get_use_fifo_merge();
dss_setup_fifos(fifo_merge);
dss_apply_fifo_merge(fifo_merge);
dss_write_regs();
dss_set_go_bits();
spin_unlock_irqrestore(&data_lock, flags);
/* wait until fifo config is in */
wait_pending_extra_info_updates();
/* step 2: enable the manager */
spin_lock_irqsave(&data_lock, flags);
if (!mgr_manual_update(mgr))
mp->updating = true;
spin_unlock_irqrestore(&data_lock, flags);
if (!mgr_manual_update(mgr))
dispc_mgr_enable(mgr->id, true);
out:
mutex_unlock(&apply_lock);
return 0;
err:
mp->enabled = false;
spin_unlock_irqrestore(&data_lock, flags);
mutex_unlock(&apply_lock);
return r;
}
void dss_mgr_disable(struct omap_overlay_manager *mgr)
{
struct mgr_priv_data *mp = get_mgr_priv(mgr);
unsigned long flags;
bool fifo_merge;
mutex_lock(&apply_lock);
if (!mp->enabled)
goto out;
if (!mgr_manual_update(mgr))
dispc_mgr_enable(mgr->id, false);
spin_lock_irqsave(&data_lock, flags);
mp->updating = false;
mp->enabled = false;
fifo_merge = get_use_fifo_merge();
dss_setup_fifos(fifo_merge);
dss_apply_fifo_merge(fifo_merge);
dss_write_regs();
dss_set_go_bits();
spin_unlock_irqrestore(&data_lock, flags);
wait_pending_extra_info_updates();
out:
mutex_unlock(&apply_lock);
}
int dss_mgr_set_info(struct omap_overlay_manager *mgr,
struct omap_overlay_manager_info *info)
{
struct mgr_priv_data *mp = get_mgr_priv(mgr);
unsigned long flags;
int r;
r = dss_mgr_simple_check(mgr, info);
if (r)
return r;
spin_lock_irqsave(&data_lock, flags);
mp->user_info = *info;
mp->user_info_dirty = true;
spin_unlock_irqrestore(&data_lock, flags);
return 0;
}
void dss_mgr_get_info(struct omap_overlay_manager *mgr,
struct omap_overlay_manager_info *info)
{
struct mgr_priv_data *mp = get_mgr_priv(mgr);
unsigned long flags;
spin_lock_irqsave(&data_lock, flags);
*info = mp->user_info;
spin_unlock_irqrestore(&data_lock, flags);
}
int dss_mgr_set_device(struct omap_overlay_manager *mgr,
struct omap_dss_device *dssdev)
{
int r;
mutex_lock(&apply_lock);
if (dssdev->manager) {
DSSERR("display '%s' already has a manager '%s'\n",
dssdev->name, dssdev->manager->name);
r = -EINVAL;
goto err;
}
if ((mgr->supported_displays & dssdev->type) == 0) {
DSSERR("display '%s' does not support manager '%s'\n",
dssdev->name, mgr->name);
r = -EINVAL;
goto err;
}
dssdev->manager = mgr;
mgr->device = dssdev;
mutex_unlock(&apply_lock);
return 0;
err:
mutex_unlock(&apply_lock);
return r;
}
int dss_mgr_unset_device(struct omap_overlay_manager *mgr)
{
int r;
mutex_lock(&apply_lock);
if (!mgr->device) {
DSSERR("failed to unset display, display not set.\n");
r = -EINVAL;
goto err;
}
/*
* Don't allow currently enabled displays to have the overlay manager
* pulled out from underneath them
*/
if (mgr->device->state != OMAP_DSS_DISPLAY_DISABLED) {
r = -EINVAL;
goto err;
}
mgr->device->manager = NULL;
mgr->device = NULL;
mutex_unlock(&apply_lock);
return 0;
err:
mutex_unlock(&apply_lock);
return r;
}
static void dss_apply_mgr_timings(struct omap_overlay_manager *mgr,
struct omap_video_timings *timings)
{
struct mgr_priv_data *mp = get_mgr_priv(mgr);
mp->timings = *timings;
mp->extra_info_dirty = true;
}
void dss_mgr_set_timings(struct omap_overlay_manager *mgr,
struct omap_video_timings *timings)
{
unsigned long flags;
mutex_lock(&apply_lock);
spin_lock_irqsave(&data_lock, flags);
dss_apply_mgr_timings(mgr, timings);
dss_write_regs();
dss_set_go_bits();
spin_unlock_irqrestore(&data_lock, flags);
wait_pending_extra_info_updates();
mutex_unlock(&apply_lock);
}
static void dss_apply_mgr_lcd_config(struct omap_overlay_manager *mgr,
const struct dss_lcd_mgr_config *config)
{
struct mgr_priv_data *mp = get_mgr_priv(mgr);
mp->lcd_config = *config;
mp->extra_info_dirty = true;
}
void dss_mgr_set_lcd_config(struct omap_overlay_manager *mgr,
const struct dss_lcd_mgr_config *config)
{
unsigned long flags;
struct mgr_priv_data *mp = get_mgr_priv(mgr);
mutex_lock(&apply_lock);
if (mp->enabled) {
DSSERR("cannot apply lcd config for %s: manager needs to be disabled\n",
mgr->name);
goto out;
}
spin_lock_irqsave(&data_lock, flags);
dss_apply_mgr_lcd_config(mgr, config);
dss_write_regs();
dss_set_go_bits();
spin_unlock_irqrestore(&data_lock, flags);
wait_pending_extra_info_updates();
out:
mutex_unlock(&apply_lock);
}
int dss_ovl_set_info(struct omap_overlay *ovl,
struct omap_overlay_info *info)
{
struct ovl_priv_data *op = get_ovl_priv(ovl);
unsigned long flags;
int r;
r = dss_ovl_simple_check(ovl, info);
if (r)
return r;
spin_lock_irqsave(&data_lock, flags);
op->user_info = *info;
op->user_info_dirty = true;
spin_unlock_irqrestore(&data_lock, flags);
return 0;
}
void dss_ovl_get_info(struct omap_overlay *ovl,
struct omap_overlay_info *info)
{
struct ovl_priv_data *op = get_ovl_priv(ovl);
unsigned long flags;
spin_lock_irqsave(&data_lock, flags);
*info = op->user_info;
spin_unlock_irqrestore(&data_lock, flags);
}
int dss_ovl_set_manager(struct omap_overlay *ovl,
struct omap_overlay_manager *mgr)
{
struct ovl_priv_data *op = get_ovl_priv(ovl);
unsigned long flags;
int r;
if (!mgr)
return -EINVAL;
mutex_lock(&apply_lock);
if (ovl->manager) {
DSSERR("overlay '%s' already has a manager '%s'\n",
ovl->name, ovl->manager->name);
r = -EINVAL;
goto err;
}
spin_lock_irqsave(&data_lock, flags);
if (op->enabled) {
spin_unlock_irqrestore(&data_lock, flags);
DSSERR("overlay has to be disabled to change the manager\n");
r = -EINVAL;
goto err;
}
op->channel = mgr->id;
op->extra_info_dirty = true;
ovl->manager = mgr;
list_add_tail(&ovl->list, &mgr->overlays);
spin_unlock_irqrestore(&data_lock, flags);
/* XXX: When there is an overlay on a DSI manual update display, and
* the overlay is first disabled, then moved to tv, and enabled, we
* seem to get SYNC_LOST_DIGIT error.
*
* Waiting doesn't seem to help, but updating the manual update display
* after disabling the overlay seems to fix this. This hints that the
* overlay is perhaps somehow tied to the LCD output until the output
* is updated.
*
* Userspace workaround for this is to update the LCD after disabling
* the overlay, but before moving the overlay to TV.
*/
mutex_unlock(&apply_lock);
return 0;
err:
mutex_unlock(&apply_lock);
return r;
}
int dss_ovl_unset_manager(struct omap_overlay *ovl)
{
struct ovl_priv_data *op = get_ovl_priv(ovl);
unsigned long flags;
int r;
mutex_lock(&apply_lock);
if (!ovl->manager) {
DSSERR("failed to detach overlay: manager not set\n");
r = -EINVAL;
goto err;
}
spin_lock_irqsave(&data_lock, flags);
if (op->enabled) {
spin_unlock_irqrestore(&data_lock, flags);
DSSERR("overlay has to be disabled to unset the manager\n");
r = -EINVAL;
goto err;
}
op->channel = -1;
ovl->manager = NULL;
list_del(&ovl->list);
spin_unlock_irqrestore(&data_lock, flags);
mutex_unlock(&apply_lock);
return 0;
err:
mutex_unlock(&apply_lock);
return r;
}
bool dss_ovl_is_enabled(struct omap_overlay *ovl)
{
struct ovl_priv_data *op = get_ovl_priv(ovl);
unsigned long flags;
bool e;
spin_lock_irqsave(&data_lock, flags);
e = op->enabled;
spin_unlock_irqrestore(&data_lock, flags);
return e;
}
int dss_ovl_enable(struct omap_overlay *ovl)
{
struct ovl_priv_data *op = get_ovl_priv(ovl);
unsigned long flags;
bool fifo_merge;
int r;
mutex_lock(&apply_lock);
if (op->enabled) {
r = 0;
goto err1;
}
if (ovl->manager == NULL || ovl->manager->device == NULL) {
r = -EINVAL;
goto err1;
}
spin_lock_irqsave(&data_lock, flags);
op->enabling = true;
r = dss_check_settings(ovl->manager);
if (r) {
DSSERR("failed to enable overlay %d: check_settings failed\n",
ovl->id);
goto err2;
}
/* step 1: configure fifos/fifomerge for currently enabled ovls */
fifo_merge = get_use_fifo_merge();
dss_setup_fifos(fifo_merge);
dss_apply_fifo_merge(fifo_merge);
dss_write_regs();
dss_set_go_bits();
spin_unlock_irqrestore(&data_lock, flags);
/* wait for fifo configs to go in */
wait_pending_extra_info_updates();
/* step 2: enable the overlay */
spin_lock_irqsave(&data_lock, flags);
op->enabling = false;
dss_apply_ovl_enable(ovl, true);
dss_write_regs();
dss_set_go_bits();
spin_unlock_irqrestore(&data_lock, flags);
/* wait for overlay to be enabled */
wait_pending_extra_info_updates();
mutex_unlock(&apply_lock);
return 0;
err2:
op->enabling = false;
spin_unlock_irqrestore(&data_lock, flags);
err1:
mutex_unlock(&apply_lock);
return r;
}
int dss_ovl_disable(struct omap_overlay *ovl)
{
struct ovl_priv_data *op = get_ovl_priv(ovl);
unsigned long flags;
bool fifo_merge;
int r;
mutex_lock(&apply_lock);
if (!op->enabled) {
r = 0;
goto err;
}
if (ovl->manager == NULL || ovl->manager->device == NULL) {
r = -EINVAL;
goto err;
}
/* step 1: disable the overlay */
spin_lock_irqsave(&data_lock, flags);
dss_apply_ovl_enable(ovl, false);
dss_write_regs();
dss_set_go_bits();
spin_unlock_irqrestore(&data_lock, flags);
/* wait for the overlay to be disabled */
wait_pending_extra_info_updates();
/* step 2: configure fifos/fifomerge */
spin_lock_irqsave(&data_lock, flags);
fifo_merge = get_use_fifo_merge();
dss_setup_fifos(fifo_merge);
dss_apply_fifo_merge(fifo_merge);
dss_write_regs();
dss_set_go_bits();
spin_unlock_irqrestore(&data_lock, flags);
/* wait for fifo config to go in */
wait_pending_extra_info_updates();
mutex_unlock(&apply_lock);
return 0;
err:
mutex_unlock(&apply_lock);
return r;
}