[PATCH v3 12/12] drm/bridge: tc358768: Attempt to fix DSI horizontal timings

[Tomi Valkeinen]

On 04/09/2023 21:46, Marcel Ziswiler wrote:
> Hi Tomi
> 
> Looks good. Thanks! Tested both on Verdin AM62 as well as on Verdin iMX8M Mini.
> 
> Just a minor nit-pick in your code comment further below.
> 
> On Tue, 2023-08-22 at 19:19 +0300, Tomi Valkeinen wrote:
>> The DSI horizontal timing calculations done by the driver seem to often
>> lead to underflows or overflows, depending on the videomode.
>>
>> There are two main things the current driver doesn't seem to get right:
>> DSI HSW and HFP, and VSDly. However, even following Toshiba's
>> documentation it seems we don't always get a working display.
>>
>> This patch attempts to fix the horizontal timings for DSI event mode, and
>> on a system with a DSI->HDMI encoder, a lot of standard HDMI modes now
>> seem to work. The work relies on Toshiba's documentation, but also quite
>> a bit on empirical testing.
>>
>> This also adds timing related debug prints to make it easier to improve
>> on this later.
>>
>> The DSI pulse mode has only been tested with a fixed-resolution panel,
>> which limits the testing of different modes on DSI pulse mode. However,
>> as the VSDly calculation also affects pulse mode, so this might cause a
>> regression.
>>
>> Reviewed-by: Peter Ujfalusi <peter.ujfalusi at gmail.com>
>> Signed-off-by: Tomi Valkeinen <tomi.valkeinen at ideasonboard.com>
> 
> For the whole series:
> 
> Tested-by: Marcel Ziswiler <marcel.ziswiler at toradex.com>

Thanks! I have fixed the typo in the comment.

  Tomi