Hi Maxime, On 22.09.2021 10:53, Maxime Ripard wrote: > On Fri, Sep 17, 2021 at 02:35:05PM +0200, Marek Szyprowski wrote: >> On 13.09.2021 12:30, Andrzej Hajda wrote: >>> W dniu 10.09.2021 o 12:12, Maxime Ripard pisze: >>>> Without proper care and an agreement between how DSI hosts and devices >>>> drivers register their MIPI-DSI entities and potential components, we can >>>> end up in a situation where the drivers can never probe. >>>> >>>> Most drivers were taking evasive maneuvers to try to workaround this, >>>> but not all of them were following the same conventions, resulting in >>>> various incompatibilities between DSI hosts and devices. >>>> >>>> Now that we have a sequence agreed upon and documented, let's convert >>>> exynos to it. >>>> >>>> Signed-off-by: Maxime Ripard <maxime@xxxxxxxxxx> >>> This patch should be dropped, as it will probably break the driver. >>> >>> Exynos is already compatible with the pattern >>> register-bus-then-get-sink, but it adds/removes panel/bridge >>> dynamically, so it creates drm_device without waiting for downstream sink. >> Right, this patch breaks Exynos DSI driver operation. Without it, the >> whole series works fine on all Exynos based test boards. > Thanks for testing. Did you have any board using one of those bridges in > your test sample? Nope, the only bridges I've tested are tc358764 and exynos-mic. However, both are used in a bit special way. The rest of my test boards just have a dsi panel. Best regards -- Marek Szyprowski, PhD Samsung R&D Institute Poland
