Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934818AbZLQBYB (ORCPT ); Wed, 16 Dec 2009 20:24:01 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1763739AbZLQBVP (ORCPT ); Wed, 16 Dec 2009 20:21:15 -0500 Received: from kroah.org ([198.145.64.141]:41487 "EHLO coco.kroah.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1763682AbZLQBVB (ORCPT ); Wed, 16 Dec 2009 20:21:01 -0500 X-Mailbox-Line: From gregkh@mini.kroah.org Wed Dec 16 17:16:08 2009 Message-Id: <20091217011608.305374103@mini.kroah.org> User-Agent: quilt/0.48-1 Date: Wed, 16 Dec 2009 17:15:30 -0800 From: Greg KH To: linux-kernel@vger.kernel.org, stable@kernel.org Cc: stable-review@kernel.org, torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Jesse Barnes , Eric Anholt , Stefan Bader Subject: [79/90] drm/i915: save/restore BLC histogram control reg across suspend/resume In-Reply-To: <20091217011835.GA20434@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2410 Lines: 62 2.6.31-stable review patch. If anyone has any objections, please let us know. ------------------ From: Jesse Barnes 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 --- drivers/gpu/drm/i915/i915_drv.h | 1 + drivers/gpu/drm/i915/i915_reg.h | 2 ++ drivers/gpu/drm/i915/i915_suspend.c | 2 ++ 3 files changed, 5 insertions(+) --- 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; --- 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 */ --- 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 *d 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 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); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/