Signed-off-by: Tomi Valkeinen<tomi.valkei...@ti.com>
---
drivers/video/omap2/dss/apply.c | 215 ++++++++++++++++++++++++++++++++++++++-
1 files changed, 212 insertions(+), 3 deletions(-)
diff --git a/drivers/video/omap2/dss/apply.c b/drivers/video/omap2/dss/apply.c
index 5d933b9..72afa85 100644
--- a/drivers/video/omap2/dss/apply.c
+++ b/drivers/video/omap2/dss/apply.c
@@ -166,6 +166,169 @@ static bool mgr_manual_update(struct omap_overlay_manager
*mgr)
return mgr->device->caps& OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE;
}
+/* Check if overlay parameters are compatible with display */
+static int dss_ovl_check(struct omap_overlay *ovl,
+ struct omap_overlay_info *info, struct omap_dss_device *dssdev)
+{
+ u16 outw, outh;
+ u16 dw, dh;
+
+ if (dssdev == NULL)
+ return 0;
+
+ dssdev->driver->get_resolution(dssdev,&dw,&dh);
+
+ if ((ovl->caps& OMAP_DSS_OVL_CAP_SCALE) == 0) {
+ outw = info->width;
+ outh = info->height;
+ } else {
+ if (info->out_width == 0)
+ outw = info->width;
+ else
+ outw = info->out_width;
+
+ if (info->out_height == 0)
+ outh = info->height;
+ else
+ outh = info->out_height;
+ }
+
+ if (dw< info->pos_x + outw) {
+ DSSERR("overlay %d horizontally not inside the display area "
+ "(%d + %d>= %d)\n",
+ ovl->id, info->pos_x, outw, dw);
+ return -EINVAL;
+ }
+
+ if (dh< info->pos_y + outh) {
+ DSSERR("overlay %d vertically not inside the display area "
+ "(%d + %d>= %d)\n",
+ ovl->id, info->pos_y, outh, dh);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int dss_mgr_check_zorder(struct omap_overlay_manager *mgr,
+ struct omap_overlay_info **overlay_infos)
+{
+ struct omap_overlay *ovl1, *ovl2;
+ struct ovl_priv_data *op1, *op2;
+ struct omap_overlay_info *info1, *info2;
+
+ list_for_each_entry(ovl1,&mgr->overlays, list) {
+ op1 = get_ovl_priv(ovl1);
+ info1 = overlay_infos[ovl1->id];
+
+ if (info1 == NULL)
+ continue;
+
+ list_for_each_entry(ovl2,&mgr->overlays, list) {
+ if (ovl1 == ovl2)
+ continue;
+
+ op2 = get_ovl_priv(ovl2);
+ info2 = overlay_infos[ovl2->id];
+
+ if (info2 == NULL)
+ continue;
+
+ if (info1->zorder == info2->zorder) {
+ DSSERR("overlays %d and %d have the same "
+ "zorder %d\n",
+ ovl1->id, ovl2->id, info1->zorder);
+ return -EINVAL;
+ }
+ }
+ }
+
+ return 0;
+}
+
+static int dss_mgr_check(struct omap_overlay_manager *mgr,
+ struct omap_dss_device *dssdev,
+ struct omap_overlay_manager_info *info,
+ struct omap_overlay_info **overlay_infos)
+{
+ struct omap_overlay *ovl;
+ int r;
+
+ if (dss_has_feature(FEAT_ALPHA_FREE_ZORDER)) {
+ r = dss_mgr_check_zorder(mgr, overlay_infos);
+ if (r)
+ return r;
+ }
+
+ list_for_each_entry(ovl,&mgr->overlays, list) {
+ struct omap_overlay_info *oi;
+ int r;
+
+ oi = overlay_infos[ovl->id];
+
+ if (oi == NULL)
+ continue;
+
+ r = dss_ovl_check(ovl, oi, dssdev);
+ if (r)
+ return r;
+ }
+
+ return 0;
+}
+static int dss_check_settings_low(struct omap_overlay_manager *mgr,
+ struct omap_dss_device *dssdev, 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 (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)
+ 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, dssdev, mi, ois);
+}
+
+/*
+ * check manager and overlay settings using overlay_info from data->info
+ */
+static int dss_check_settings(struct omap_overlay_manager *mgr,
+ struct omap_dss_device *dssdev)
+{
+ return dss_check_settings_low(mgr, dssdev, 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,
+ struct omap_dss_device *dssdev)
+{
+ return dss_check_settings_low(mgr, dssdev, true);
+}
+
static bool need_isr(void)
{
const int num_mgrs = dss_feat_get_num_mgrs();
@@ -517,6 +680,7 @@ static void dss_write_regs(void)
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);
@@ -524,6 +688,13 @@ static void dss_write_regs(void)
if (!mp->enabled || mgr_manual_update(mgr) || mp->busy)
continue;
+ r = dss_check_settings(mgr, mgr->device);
+ if (r) {
+ DSSERR("cannot write registers for manager %s: "
+ "illegal configuration\n", mgr->name);
+ continue;
+ }
+
dss_mgr_write_regs(mgr);
if (need_go(mgr)) {
@@ -541,11 +712,19 @@ void dss_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, mgr->device);
+ if (r) {
+ DSSERR("cannot start manual update: illegal configuration\n");
+ spin_unlock_irqrestore(&data_lock, flags);
+ return;
+ }
+
dss_mgr_write_regs(mgr);
mp->updating = true;
@@ -690,11 +869,19 @@ 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, mgr->device);
+ 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);
@@ -784,6 +971,7 @@ void dss_mgr_enable(struct omap_overlay_manager *mgr)
{
struct mgr_priv_data *mp = get_mgr_priv(mgr);
unsigned long flags;
+ int r;
mutex_lock(&apply_lock);
@@ -793,6 +981,16 @@ void dss_mgr_enable(struct omap_overlay_manager *mgr)
spin_lock_irqsave(&data_lock, flags);
mp->enabled = true;
+ r = dss_check_settings(mgr, mgr->device);
+ mp->enabled = false;
+ if (r) {
+ DSSERR("failed to enable manager %d: check_settings failed\n",
+ mgr->id);
+ spin_unlock_irqrestore(&data_lock, flags);
+ goto out;
+ }
+
+ mp->enabled = true;
dss_mgr_setup_fifos(mgr);
@@ -1142,16 +1340,25 @@ int dss_ovl_enable(struct omap_overlay *ovl)
if (op->enabled) {
r = 0;
- goto err;
+ goto err1;
}
if (ovl->manager == NULL || ovl->manager->device == NULL) {
r = -EINVAL;
- goto err;
+ goto err1;
}
spin_lock_irqsave(&data_lock, flags);
+ op->enabled = true;
+ r = dss_check_settings(ovl->manager, ovl->manager->device);
+ op->enabled = false;
+ if (r) {
+ DSSERR("failed to enable overlay %d: check_settings failed\n",
+ ovl->id);
+ goto err2;
+ }
+
dss_apply_ovl_enable(ovl, true);
dss_ovl_setup_fifo(ovl);
@@ -1163,7 +1370,9 @@ int dss_ovl_enable(struct omap_overlay *ovl)
mutex_unlock(&apply_lock);
return 0;
-err:
+err2:
+ spin_unlock_irqrestore(&data_lock, flags);
+err1:
mutex_unlock(&apply_lock);
return r;
}
