[PATCH] drm: rcar-du: lvds: fix LVDCR1 for R-Car gen3

Sergei Shtylyov sergei.shtylyov at cogentembedded.com
Sat Dec 23 15:28:39 UTC 2017


On 12/23/2017 04:09 PM, Laurent Pinchart wrote:

> On Thursday, 21 December 2017 22:23:30 EET Sergei Shtylyov wrote:
>> The LVDCR1 register for the R-Car gen3 SoCs was documented as having the
>> layout different from the gen2 SoCs in  the early R-Car gen3 manuals but
>> since v0.52 the LVDCR1 layout is described as being the same as on the gen2
>> SoCs; the old CHn control values are said to be prohibited now (and there
>> seems to be no valid output signal when they are used).
> Could it be that the "Gen3" values are specific to the H3 ES1.x ? I've got the

    I don't know. All I know is that the LVDCR1 description was changed in 
v.52 of the gen3 manual (the 1st version that documented R-Car V3M).

> LVDS output working on a Salvator-X H3 board with the existing code, although
> I'm not sure at the moment whether that was on ES1.x or ES2.0. I can check
> that when I'll get access to the hardware back in a week.
> On which platform have you tested this patch ?

    R-Car V3M (R8A77970), V3M Starter Kit board.

>> Fixes: 6bc2e15cf21c ("drm: rcar-du: lvds: Add R-Car Gen3 support")
>> Signed-off-by: Sergei Shtylyov <sergei.shtylyov at cogentembedded.com>

MBR, Sergei

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