[PATCH] drm: tegra: Use framebuffer pitch as line stride

[Mark Zhang]

On 11/27/2012 06:37 AM, Stephen Warren wrote:
> On 11/22/2012 12:37 PM, Thierry Reding wrote:
>> Instead of using the stride derived from the display mode, use the pitch
>> associated with the currently active framebuffer. This fixes a bug where
>> the LCD display content would be skewed when enabling HDMI with a video
>> mode different from that of the LCD.
> 
> This patch certainly doesn't cause any additional issues for me, so:
> 
> Tested-by: Stephen Warren <swarren at nvidia.com>
> 
> Howwever, it still doesn't allow both Cardhu's LCD panel and external
> HDMI port (1080p) to be active at once. If I boot with both enabled, or
> boot with just the LCD enabled and hot-plug HDMI, as soon as both heads
> are active, then some kind of display corruption starts; it looks like a
> clocking issue or perhaps memory underflow.
>

I haven't observed this issue. What kind of display corruption you mean?
Did it recover after some seconds or the display in LVDS panel was
always corrupted?

During my testing, I connected HDMI while booting cardhu and I can see
the LVDS and HDMI working with no corruptions.


> Mark, can you please investigate this. I haven't tested to see if the
> issue is Tegra30-specific, or also happens on Tegra20.
>