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authorBen Skeggs <bskeggs@redhat.com>2012-01-31 03:16:59 +0400
committerBen Skeggs <bskeggs@redhat.com>2012-02-01 09:23:55 +0400
commit7df898b1a70b13c3a8892625f4ead929d9554293 (patch)
treebeda118e6b81145a03ee25821dbdad9f5ec9303e /drivers
parent62aa2b537c6f5957afd98e29f96897419ed5ebab (diff)
downloadlinux-7df898b1a70b13c3a8892625f4ead929d9554293.tar.xz
drm/nouveau/disp: check that panel power gpio is enabled at init time
Reported-by: Yuriy Khomchik <homyur@gmail.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_bios.h5
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_display.c10
2 files changed, 13 insertions, 2 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_bios.h b/drivers/gpu/drm/nouveau/nouveau_bios.h
index 1e382ad5a2b8..a37c31e358aa 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bios.h
+++ b/drivers/gpu/drm/nouveau/nouveau_bios.h
@@ -54,9 +54,10 @@ struct bit_entry {
int bit_table(struct drm_device *, u8 id, struct bit_entry *);
enum dcb_gpio_tag {
- DCB_GPIO_TVDAC0 = 0xc,
+ DCB_GPIO_PANEL_POWER = 0x01,
+ DCB_GPIO_TVDAC0 = 0x0c,
DCB_GPIO_TVDAC1 = 0x2d,
- DCB_GPIO_PWM_FAN = 0x9,
+ DCB_GPIO_PWM_FAN = 0x09,
DCB_GPIO_FAN_SENSE = 0x3d,
DCB_GPIO_UNUSED = 0xff
};
diff --git a/drivers/gpu/drm/nouveau/nouveau_display.c b/drivers/gpu/drm/nouveau/nouveau_display.c
index 3cb52bc52b21..795a9e3c990a 100644
--- a/drivers/gpu/drm/nouveau/nouveau_display.c
+++ b/drivers/gpu/drm/nouveau/nouveau_display.c
@@ -219,6 +219,16 @@ nouveau_display_init(struct drm_device *dev)
if (ret)
return ret;
+ /* power on internal panel if it's not already. the init tables of
+ * some vbios default this to off for some reason, causing the
+ * panel to not work after resume
+ */
+ if (nouveau_gpio_func_get(dev, DCB_GPIO_PANEL_POWER) == 0) {
+ nouveau_gpio_func_set(dev, DCB_GPIO_PANEL_POWER, true);
+ msleep(300);
+ }
+
+ /* enable polling for external displays */
drm_kms_helper_poll_enable(dev);
/* enable hotplug interrupts */