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| author | Stanley.Miao <stanley.miao@windriver.com> | 2010-09-03 05:03:48 +0200 |
|---|---|---|
| committer | Tomi Valkeinen <tomi.valkeinen@nokia.com> | 2010-10-22 23:21:14 +0300 |
| commit | 18016e35d448d35739f8640b51476709c07e95db (patch) | |
| tree | f01f76bd471332308d6e7c22af6310386437d121 /drivers/video/omap2 | |
| parent | 41814cfc01b059df33011d929837558c22f3c0e0 (diff) | |
| download | linux-18016e35d448d35739f8640b51476709c07e95db.tar.gz linux-18016e35d448d35739f8640b51476709c07e95db.tar.bz2 linux-18016e35d448d35739f8640b51476709c07e95db.zip | |
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>
Diffstat (limited to 'drivers/video/omap2')
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); |