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SubjectRe: [PATCH v5 00/80] drm/vc4: Support BCM2711 Display Pipeline
Hi Maxime,

On 9/3/20 5:00 PM, Maxime Ripard wrote:
> Hi everyone,
> Here's a (pretty long) series to introduce support in the VC4 DRM driver
> for the display pipeline found in the BCM2711 (and thus the RaspberryPi 4).
> The main differences are that there's two HDMI controllers and that there's
> more pixelvalve now. Those pixelvalve come with a mux in the HVS that still
> have only 3 FIFOs. Both of those differences are breaking a bunch of
> expectations in the driver, so we first need a good bunch of cleanup and
> reworks to introduce support for the new controllers.
> Similarly, the HDMI controller has all its registers shuffled and split in
> multiple controllers now, so we need a bunch of changes to support this as
> well.
> Only the HDMI support is enabled for now (even though the DPI and DSI
> outputs have been tested too).
> Let me know if you have any comments
> Maxime
> Cc:
> Cc:
> Cc: Kamal Dasu <>
> Cc: Philipp Zabel <>
> Cc: Rob Herring <>
> Cc: Stephen Boyd <>
> Changes from v4:
> - Rebased on top of next-20200828
> - Collected the various tags
> - Fixed some issues with 4k support and dual output (thanks Hoegeun!)

Thanks for your v5 patchset.

I tested all patches based on the next-20200812.

Everything else is fine, but the dual hdmi modetest doesn't work well in my

In my environment, dsi is not connected, I have seen your answer[1].

Do you have any other settings? For example in config.txt.


> - Fixed typos in commit logs (thanks Dave!)
> - Split the csc setup hook into its own patch again
> - Added the CEC clock to the DT binding
> - Fixed the DT binding example
> - Reduced the number of calls to of_device_is_compatible in vc4_kms_load
> - Added back the check for the state commit in our commit hook

Best regards,


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