From: Ben Skeggs Date: Mon, 30 Jan 2012 23:16:59 +0000 (+1000) Subject: drm/nouveau/disp: check that panel power gpio is enabled at init time X-Git-Tag: firefly_0821_release~3680^2~3590^2~6^2~4 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=7df898b1a70b13c3a8892625f4ead929d9554293;p=firefly-linux-kernel-4.4.55.git drm/nouveau/disp: check that panel power gpio is enabled at init time Reported-by: Yuriy Khomchik Signed-off-by: Ben Skeggs --- 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 */