On Thu, Jan 6, 2011 at 21:55, Alex Riesen raa.lkml@gmail.com wrote:
On Thu, Jan 6, 2011 at 18:49, Chris Wilson chris@chris-wilson.co.uk wrote:
My fear is that some machines have a dependency between the backlight and panel power status. The patch in question changed the timing between turning on the panel and adjusting the backlight which would be restore with:
diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c index aa23070..0b40b4f 100644 --- a/drivers/gpu/drm/i915/intel_lvds.c +++ b/drivers/gpu/drm/i915/intel_lvds.c @@ -106,6 +106,12 @@ static void intel_lvds_enable(struct intel_lvds *intel_lvds) I915_WRITE(ctl_reg, I915_READ(ctl_reg) | POWER_TARGET_ON); POSTING_READ(lvds_reg);
- {
- u32 reg = HAS_PCH_SPLIT(dev) ? PCH_PP_STATUS : PPS_STATUS;
...
FWIW it does not compile: CC drivers/gpu/drm/i915/intel_lvds.o drivers/gpu/drm/i915/intel_lvds.c: In function ‘intel_lvds_enable’: drivers/gpu/drm/i915/intel_lvds.c:110: error: ‘PPS_STATUS’ undeclared
Ah, I see. Should be PP_STATUS. Whatever. It does not help. The backlight stays off.
P.S. Probably unrelated, but I just noticed that the backlight never goes off when closing the lid. Am I supposed to hook up on the corresponding input event and put the panel in standby? It used to work all by itself, I think...