APPLIED: [PATCH] [Natty SRU] drm/i915: disable PCH ports if needed when disabling a CRTC

[Tim Gardner]

On 06/21/2011 07:49 PM, Keng-Yu Lin wrote:
>
> SRU Justification
>
> Impact: Not uable to switch to the externel output-only (e.g. VGA or HDMI) mode.
> It causes flickering on the externally attached monitor. This bug is common on
> many SandyBridge-based laptops.
>
> Fix: Upstream patch to disable PCH ports if needed when disabling a CRTC.
>
> Test case: I tested on Lenovo Zhaoyang E47 and two Dell SandyBridge-based laptops.
>
> BugLink: http://bugs.launchpad.net/bugs/791752
>
> This backport patch is not in 2.6.38.y because of its end-of-life.
> For the reference, the patch helps LP#745112 too, though not perfectly.
>
>
> Keng-Yu Lin (1):
>    drm/i915: disable PCH ports if needed when disabling a CRTC
>
>   drivers/gpu/drm/i915/i915_reg.h      |   15 ++++++++
>   drivers/gpu/drm/i915/intel_display.c |   61 +++++++++++++++++++++++++++++----
>   2 files changed, 68 insertions(+), 8 deletions(-)
>


-- 
Tim Gardner tim.gardner at canonical.com