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

On Mon, Jul 5, 2021 at 5:43 PM Marek Szyprowski
[off-list ref] wrote:

On 05.07.2021 14:00, Jagan Teki wrote:

quoted

On Mon, Jul 5, 2021 at 5:18 PM Marek Szyprowski
[off-list ref] wrote:

quoted

On 04.07.2021 11:02, Jagan Teki wrote:

quoted

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@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@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.

Okay. Let me check with sun6i-mipi-dsi as it is component_ops based.

Jagan.

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