[PATCH 0/5] drm/vc4: hdmi: Remove CPU hangs, take 2

[Maxime Ripard]

Hi,

On Wed, Sep 22, 2021 at 02:54:14PM +0200, Maxime Ripard wrote:
> Hi,
> 
> Here's another attempt at fixing the complete CPU stall while retrieving the
> HDMI connector status when the connector is disabled.
> 
> This was fixed already, but eventually got reverted by Linus due to the same
> symptom happening in another situation. This was likely (but not confirmed by
> the reporter) due to the kernel being booted without an HDMI display connected,
> in which case the firmware won't initialise the HDMI State Machine clock.
> 
> This is fixed by patch 3. However, further changes in the clock drivers were
> needed for clk_set_min_rate to be used, which are patches 1 and 2.
> 
> Finally, patches 4 and 5 are the original patches that were reverted. Patch 4
> got a small modification to move the clk_set_min_rate() call before the HSM
> clock is enabled.

If we merge the clock patches and DRM patches separately we're going to
break bisectability. I guess the easiest approach would be to merge the
clk patches through DRM. Does that work for everyone?

Maxime
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