[Intel-gfx] [PATCH 1/2] drm/edid: adjust double-clocked cea modes

[Paulo Zanoni]

2012/5/12 Daniel Vetter <daniel.vetter at ffwll.ch>:
> The CEA spec has a bunch of very peculiar modes. For backwards
> compatibility it specifies a bunch of modes that are suitable to
> display old SD TV content. But these modes have such low pixel clocks
> that pixels need to be doubled to reach the minimal clock of the HDMI
> interface.
>

I just tested the 2 patches. They don't work for me... My monitor
complains the timings are not supported, and now I get a black screen
instead of a screen with half of the vertical pixel columns.

                      HTOTAL_B: 0x035f02cf (720 active, 864 total)
                      HBLANK_B: 0x035f02cf (720 start, 864 end)
                       HSYNC_B: 0x031a02db (732 start, 795 end)
                      VTOTAL_B: 0x026f023f (576 active, 624 total)
                      VBLANK_B: 0x026f023f (576 start, 624 end)
                       VSYNC_B: 0x02490243 (580 start, 586 end)

I believe the timings sent to the hardware must be the ones we were
already sending before the patches...

-- 
Paulo Zanoni