[PATCH v3 0/7] drm: exynos: dsi: Convert drm bridge

[Marek Szyprowski]

Dear Jagan,

On 12.12.2021 19:14, Jagan Teki wrote:
> Updated series about drm bridge conversion of exynos dsi.
>
> Patch 1: panel checker
>
> Patch 2: panel_bridge API
>
> Patch 3: Bridge conversion
>
> Patch 4: pree_enable, post_disable
>
> Patch 5: Atomic functions
>
> Patch 6: atomic_set
>
> Patch 7: DSI init in enable
>
> [1] https://patchwork.kernel.org/project/dri-devel/cover/20211210191922.2367979-1-jagan@amarulasolutions.com/
>
> Any inputs?

I've checked this patchset on Exynos based Trats2 board (the one with 
simplest display pipeline: Exynos FIMD -> Exynos DSI -> s6e8aa0 DSI 
panel). DRM stops working after the 2nd patch ("[PATCH v3 2/7] drm: 
exynos: dsi: Use drm panel_bridge API"):

# dmesg | grep drm
[    2.511893] [drm] Exynos DRM: using 11c00000.fimd device for DMA 
mapping operations
[    2.518653] exynos-drm exynos-drm: bound 11c00000.fimd (ops 
fimd_component_ops)
[    2.535699] exynos-drm exynos-drm: bound 11c80000.dsi (ops 
exynos_dsi_component_ops)
[    2.543912] exynos-drm exynos-drm: [drm] Cannot find any crtc or sizes
[    2.556107] [drm] Initialized exynos 1.1.0 20180330 for exynos-drm on 
minor 0
[    2.573212] exynos-dsi 11c80000.dsi: [drm:exynos_dsi_host_attach] 
*ERROR* failed to find the bridge: -19
[    2.653553] [drm] Initialized lima 1.1.0 20191231 for 13000000.gpu on 
minor 1

# ./modetest -c -Mexynos
Connectors:
id      encoder status          name            size (mm) modes   encoders

Applying the whole patchset doesn't fix anything.


> Jagan.
>
> Jagan Teki (7):
>    drm: exynos: dsi: Check panel for panel helpers
>    drm: exynos: dsi: Use drm panel_bridge API
>    drm: exynos: dsi: Convert to bridge driver
>    drm: exynos: dsi: Separate pre_enable, post_disable code
>    drm: exynos: dsi: Switch to atomic funcs
>    drm: exynos: dsi: Get the mode from bridge
>    drm: exynos: dsi: Move DSI init in bridge enable
>
>   drivers/gpu/drm/exynos/exynos_drm_dsi.c | 240 ++++++++----------------
>   1 file changed, 75 insertions(+), 165 deletions(-)
>
Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland