OMAP: DSS2: don't power off a panel twice

If we blank the panel by
echo 1 > /sys/devices/platform/omapfb/graphics/fb0/blank

Then, we reboot the sytem, the kernel will crash at
drivers/video/omap2/dss/core.c:323

This is because the panel is closed twice. Now check the state of a dssdev
to forbid a panel is power on or power off twice.

Signed-off-by: Stanley.Miao <stanley.miao@windriver.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

6 files changed, 36 insertions, 0 deletions

diff --git a/drivers/video/omap2/displays/panel-acx565akm.c b/drivers/video/omap2/displays/panel-acx565akm.c
index 07fbb8a733bb..e77310653207 100644
--- a/drivers/video/omap2/displays/panel-acx565akm.c
+++ b/drivers/video/omap2/displays/panel-acx565akm.c
@@ -587,6 +587,9 @@ static int acx_panel_power_on(struct omap_dss_device *dssdev)
 
         dev_dbg(&dssdev->dev, "%s\n", __func__);
 
+        if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
+                return 0;
+
         mutex_lock(&md->mutex);
 
         r = omapdss_sdi_display_enable(dssdev);
@@ -644,6 +647,9 @@ static void acx_panel_power_off(struct omap_dss_device *dssdev)
 
         dev_dbg(&dssdev->dev, "%s\n", __func__);
 
+        if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
+                return;
+
         mutex_lock(&md->mutex);
 
         if (!md->enabled) {
diff --git a/drivers/video/omap2/displays/panel-generic.c b/drivers/video/omap2/displays/panel-generic.c
index 300eff5de1b4..395a68de3990 100644
--- a/drivers/video/omap2/displays/panel-generic.c
+++ b/drivers/video/omap2/displays/panel-generic.c
@@ -39,6 +39,9 @@ static int generic_panel_power_on(struct omap_dss_device *dssdev)
 {
         int r;
 
+        if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
+                return 0;
+
         r = omapdss_dpi_display_enable(dssdev);
         if (r)
                 goto err0;
@@ -58,6 +61,9 @@ err0:
 
 static void generic_panel_power_off(struct omap_dss_device *dssdev)
 {
+        if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
+                return;
+
         if (dssdev->platform_disable)
                 dssdev->platform_disable(dssdev);
 
diff --git a/drivers/video/omap2/displays/panel-sharp-lq043t1dg01.c b/drivers/video/omap2/displays/panel-sharp-lq043t1dg01.c
index 10267461991c..0c6896cea2d0 100644
--- a/drivers/video/omap2/displays/panel-sharp-lq043t1dg01.c
+++ b/drivers/video/omap2/displays/panel-sharp-lq043t1dg01.c
@@ -43,6 +43,9 @@ static int sharp_lq_panel_power_on(struct omap_dss_device *dssdev)
 {
         int r;
 
+        if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
+                return 0;
+
         r = omapdss_dpi_display_enable(dssdev);
         if (r)
                 goto err0;
@@ -65,6 +68,9 @@ err0:
 
 static void sharp_lq_panel_power_off(struct omap_dss_device *dssdev)
 {
+        if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
+                return;
+
         if (dssdev->platform_disable)
                 dssdev->platform_disable(dssdev);
 
diff --git a/drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c b/drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c
index 7d9eb2b1f5af..9a138f650e05 100644
--- a/drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c
+++ b/drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c
@@ -135,6 +135,9 @@ static int sharp_ls_power_on(struct omap_dss_device *dssdev)
 {
         int r = 0;
 
+        if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
+                return 0;
+
         r = omapdss_dpi_display_enable(dssdev);
         if (r)
                 goto err0;
@@ -157,6 +160,9 @@ err0:
 
 static void sharp_ls_power_off(struct omap_dss_device *dssdev)
 {
+        if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
+                return;
+
         if (dssdev->platform_disable)
                 dssdev->platform_disable(dssdev);
 
diff --git a/drivers/video/omap2/displays/panel-toppoly-tdo35s.c b/drivers/video/omap2/displays/panel-toppoly-tdo35s.c
index e320e67d06f3..526e906c8a6c 100644
--- a/drivers/video/omap2/displays/panel-toppoly-tdo35s.c
+++ b/drivers/video/omap2/displays/panel-toppoly-tdo35s.c
@@ -46,6 +46,9 @@ static int toppoly_tdo_panel_power_on(struct omap_dss_device *dssdev)
 {
         int r;
 
+        if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
+                return 0;
+
         r = omapdss_dpi_display_enable(dssdev);
         if (r)
                 goto err0;
@@ -65,6 +68,9 @@ err0:
 
 static void toppoly_tdo_panel_power_off(struct omap_dss_device *dssdev)
 {
+        if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
+                return;
+
         if (dssdev->platform_disable)
                 dssdev->platform_disable(dssdev);
 
diff --git a/drivers/video/omap2/displays/panel-tpo-td043mtea1.c b/drivers/video/omap2/displays/panel-tpo-td043mtea1.c
index e866e76b13d0..dbe9d43b4850 100644
--- a/drivers/video/omap2/displays/panel-tpo-td043mtea1.c
+++ b/drivers/video/omap2/displays/panel-tpo-td043mtea1.c
@@ -269,6 +269,9 @@ static int tpo_td043_power_on(struct omap_dss_device *dssdev)
         int nreset_gpio = dssdev->reset_gpio;
         int r;
 
+        if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
+                return 0;
+
         r = omapdss_dpi_display_enable(dssdev);
         if (r)
                 goto err0;
@@ -308,6 +311,9 @@ static void tpo_td043_power_off(struct omap_dss_device *dssdev)
         struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
         int nreset_gpio = dssdev->reset_gpio;
 
+        if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
+                return;
+
         tpo_td043_write(tpo_td043->spi, 3,
                         TPO_R03_VAL_STANDBY | TPO_R03_EN_PWM);