From: Jesse Barnes Date: Wed, 14 Oct 2009 19:33:41 +0000 (-0700) Subject: drm/i915: save/restore BLC histogram control reg across suspend/resume X-Git-Tag: v2.6.31.9~13 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=ad7ce1cf569509e2f212267749f0ad75bd40b67a;p=karo-tx-linux.git drm/i915: save/restore BLC histogram control reg across suspend/resume commit 0eb96d6ed38430b72897adde58f5477a6b71757a upstream. Turns out some machines, like the ThinkPad X40 don't come back if you don't save/restore this register. Signed-off-by: Jesse Barnes Signed-off-by: Eric Anholt Cc: Stefan Bader Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 88b3eff34560..602dd76468cf 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -264,6 +264,7 @@ typedef struct drm_i915_private { u32 saveDSPASURF; u32 saveDSPATILEOFF; u32 savePFIT_PGM_RATIOS; + u32 saveBLC_HIST_CTL; u32 saveBLC_PWM_CTL; u32 saveBLC_PWM_CTL2; u32 saveFPB0; diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index c017fa18566b..9917749afb32 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -915,6 +915,8 @@ #define BACKLIGHT_DUTY_CYCLE_SHIFT (0) #define BACKLIGHT_DUTY_CYCLE_MASK (0xffff) +#define BLC_HIST_CTL 0x61260 + /* TV port control */ #define TV_CTL 0x68000 /** Enables the TV encoder */ diff --git a/drivers/gpu/drm/i915/i915_suspend.c b/drivers/gpu/drm/i915/i915_suspend.c index 1d04e1904ac6..2e4aca658b8b 100644 --- a/drivers/gpu/drm/i915/i915_suspend.c +++ b/drivers/gpu/drm/i915/i915_suspend.c @@ -416,6 +416,7 @@ int i915_save_state(struct drm_device *dev) dev_priv->savePP_CONTROL = I915_READ(PP_CONTROL); dev_priv->savePFIT_PGM_RATIOS = I915_READ(PFIT_PGM_RATIOS); dev_priv->saveBLC_PWM_CTL = I915_READ(BLC_PWM_CTL); + dev_priv->saveBLC_HIST_CTL = I915_READ(BLC_HIST_CTL); if (IS_I965G(dev)) dev_priv->saveBLC_PWM_CTL2 = I915_READ(BLC_PWM_CTL2); if (IS_MOBILE(dev) && !IS_I830(dev)) @@ -560,6 +561,7 @@ int i915_restore_state(struct drm_device *dev) I915_WRITE(PFIT_PGM_RATIOS, dev_priv->savePFIT_PGM_RATIOS); I915_WRITE(BLC_PWM_CTL, dev_priv->saveBLC_PWM_CTL); + I915_WRITE(BLC_HIST_CTL, dev_priv->saveBLC_HIST_CTL); I915_WRITE(PP_ON_DELAYS, dev_priv->savePP_ON_DELAYS); I915_WRITE(PP_OFF_DELAYS, dev_priv->savePP_OFF_DELAYS); I915_WRITE(PP_DIVISOR, dev_priv->savePP_DIVISOR);