[RFC PATCH 03/17] drm/exynos: dsi: Use the drm_panel_bridge API

[Marek Szyprowski]

On 05.07.2021 14:00, Jagan Teki wrote:
> On Mon, Jul 5, 2021 at 5:18 PM Marek Szyprowski
> <m.szyprowski at samsung.com> wrote:
>> On 04.07.2021 11:02, Jagan Teki wrote:
>>> Use drm_panel_bridge to replace manual panel and
>>> bridge_chain handling code.
>>>
>>> This makes the driver simpler to allow all components
>>> in the display pipeline to be treated as bridges by
>>> cleaning the way to generic connector handling.
>>>
>>> Signed-off-by: Jagan Teki <jagan at amarulasolutions.com>
>> This breaks Exysos DSI driver operation (Trats board worked fine with
>> only patches 1-2):
>>
>> [    2.540066] exynos4-fb 11c00000.fimd: Adding to iommu group 0
>> [    2.554733] OF: graph: no port node found in /soc/fimd at 11c00000
>> [    2.602819] [drm] Exynos DRM: using 11c00000.fimd device for DMA
>> mapping operations
>> [    2.609649] exynos-drm exynos-drm: bound 11c00000.fimd (ops
>> fimd_component_ops)
>> [    2.632558] exynos-drm exynos-drm: failed to bind 11c80000.dsi (ops
>> exynos_dsi_component_ops): -22
>> [    2.642263] exynos-drm exynos-drm: master bind failed: -22
>> [    2.651017] exynos-drm: probe of exynos-drm failed with error -22
> Thanks for testing it.
>
> Can you check Squash of 3,4 or 3,4,5 will work or not?

I've check both sets: 1-4 and 1-5 and none of them works. The result is 
same as above. If I remember correctly, last time when I played with 
that code, there was a problem with DRM core calling bridge ops in 
different order than when they are used by the Exynos DSI driver.

Best regards

-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland