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

[Stephen Warren]

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.

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