[3.16.y-ckt stable] Patch "drm/i915: don't warn if backlight unexpectedly enabled" has been added to staging queue
Luis Henriques
luis.henriques at canonical.com
Mon Jan 5 11:34:34 UTC 2015
This is a note to let you know that I have just added a patch titled
drm/i915: don't warn if backlight unexpectedly enabled
to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree
which can be found at:
http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.16.y-queue
This patch is scheduled to be released in version 3.16.7-ckt4.
If you, or anyone else, feels it should not be added to this tree, please
reply to this email.
For more information about the 3.16.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
Thanks.
-Luis
------
>From 4b29da8db2b933ba8c4af165cf4507a9c9d69c32 Mon Sep 17 00:00:00 2001
From: Scot Doyle <lkml14 at scotdoyle.com>
Date: Tue, 19 Aug 2014 02:07:13 +0000
Subject: drm/i915: don't warn if backlight unexpectedly enabled
commit 813008cd3e93ea8a571b2b7d5b9360a3105b50f7 upstream.
BIOS or firmware can modify hardware state during suspend/resume,
for example on the Toshiba CB35 or Lenovo T400, so log a debug message
instead of a warning if the backlight is unexpectedly enabled.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=80930
Cc: Jani Nikula <jani.nikula at intel.com>
Signed-off-by: Scot Doyle <lkml14 at scotdoyle.com>
Signed-off-by: Jani Nikula <jani.nikula at intel.com>
Cc: Ben Hutchings <ben at decadent.org.uk>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
drivers/gpu/drm/i915/intel_panel.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c
index 12b02fe1d0ae..59b294c5fe41 100644
--- a/drivers/gpu/drm/i915/intel_panel.c
+++ b/drivers/gpu/drm/i915/intel_panel.c
@@ -711,7 +711,7 @@ static void pch_enable_backlight(struct intel_connector *connector)
cpu_ctl2 = I915_READ(BLC_PWM_CPU_CTL2);
if (cpu_ctl2 & BLM_PWM_ENABLE) {
- WARN(1, "cpu backlight already enabled\n");
+ DRM_DEBUG_KMS("cpu backlight already enabled\n");
cpu_ctl2 &= ~BLM_PWM_ENABLE;
I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2);
}
@@ -755,7 +755,7 @@ static void i9xx_enable_backlight(struct intel_connector *connector)
ctl = I915_READ(BLC_PWM_CTL);
if (ctl & BACKLIGHT_DUTY_CYCLE_MASK_PNV) {
- WARN(1, "backlight already enabled\n");
+ DRM_DEBUG_KMS("backlight already enabled\n");
I915_WRITE(BLC_PWM_CTL, 0);
}
@@ -786,7 +786,7 @@ static void i965_enable_backlight(struct intel_connector *connector)
ctl2 = I915_READ(BLC_PWM_CTL2);
if (ctl2 & BLM_PWM_ENABLE) {
- WARN(1, "backlight already enabled\n");
+ DRM_DEBUG_KMS("backlight already enabled\n");
ctl2 &= ~BLM_PWM_ENABLE;
I915_WRITE(BLC_PWM_CTL2, ctl2);
}
@@ -820,7 +820,7 @@ static void vlv_enable_backlight(struct intel_connector *connector)
ctl2 = I915_READ(VLV_BLC_PWM_CTL2(pipe));
if (ctl2 & BLM_PWM_ENABLE) {
- WARN(1, "backlight already enabled\n");
+ DRM_DEBUG_KMS("backlight already enabled\n");
ctl2 &= ~BLM_PWM_ENABLE;
I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2);
}
--
2.1.4
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