From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:49716 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965137AbcJ1IqV (ORCPT ); Fri, 28 Oct 2016 04:46:21 -0400 Subject: Patch "drm/i915/backlight: setup and cache pwm alternate increment value" has been added to the 4.8-stable tree To: jani.nikula@intel.com, gregkh@linuxfoundation.org, shawn.c.lee@intel.com, ville.syrjala@linux.intel.com Cc: , From: Date: Fri, 28 Oct 2016 04:46:19 -0400 Message-ID: <14776443792161@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled drm/i915/backlight: setup and cache pwm alternate increment value to the 4.8-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: drm-i915-backlight-setup-and-cache-pwm-alternate-increment-value.patch and it can be found in the queue-4.8 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 16e1203db8ab740c912ea62761fdf27d7811b886 Mon Sep 17 00:00:00 2001 From: Jani Nikula Date: Mon, 19 Sep 2016 13:35:25 +0300 Subject: drm/i915/backlight: setup and cache pwm alternate increment value MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Jani Nikula commit 16e1203db8ab740c912ea62761fdf27d7811b886 upstream. This will also be needed later on when setting up the alternate increment in backlight enable. Cc: Shawn Lee Reviewed-by: Ville Syrjälä Signed-off-by: Jani Nikula Link: http://patchwork.freedesktop.org/patch/msgid/9984b20bc59aee90b83caf59ce91f3fb122c9627.1474281249.git.jani.nikula@intel.com (cherry picked from commit 32b421e79e6b546da1d469f1229403ac9142d695) Signed-off-by: Jani Nikula Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/i915/intel_drv.h | 1 + drivers/gpu/drm/i915/intel_panel.c | 14 +++++++++++--- 2 files changed, 12 insertions(+), 3 deletions(-) --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -236,6 +236,7 @@ struct intel_panel { bool enabled; bool combination_mode; /* gen 2/4 only */ bool active_low_pwm; + bool alternate_pwm_increment; /* lpt+ */ /* PWM chip */ bool util_pin_active_low; /* bxt+ */ --- a/drivers/gpu/drm/i915/intel_panel.c +++ b/drivers/gpu/drm/i915/intel_panel.c @@ -1242,10 +1242,10 @@ static u32 bxt_hz_to_pwm(struct intel_co */ static u32 spt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) { - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; u32 mul; - if (I915_READ(SOUTH_CHICKEN1) & SPT_PWM_GRANULARITY) + if (panel->backlight.alternate_pwm_increment) mul = 128; else mul = 16; @@ -1261,9 +1261,10 @@ static u32 spt_hz_to_pwm(struct intel_co static u32 lpt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; u32 mul, clock; - if (I915_READ(SOUTH_CHICKEN2) & LPT_PWM_GRANULARITY) + if (panel->backlight.alternate_pwm_increment) mul = 16; else mul = 128; @@ -1414,6 +1415,13 @@ static int lpt_setup_backlight(struct in struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; u32 pch_ctl1, pch_ctl2, val; + bool alt; + + if (HAS_PCH_LPT(dev_priv)) + alt = I915_READ(SOUTH_CHICKEN2) & LPT_PWM_GRANULARITY; + else + alt = I915_READ(SOUTH_CHICKEN1) & SPT_PWM_GRANULARITY; + panel->backlight.alternate_pwm_increment = alt; pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1); panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY; Patches currently in stable-queue which might be from jani.nikula@intel.com are queue-4.8/drm-i915-backlight-setup-backlight-pwm-alternate-increment-on-backlight-enable.patch queue-4.8/drm-i915-backlight-setup-and-cache-pwm-alternate-increment-value.patch