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

[Maxime Ripard]

On Fri, Sep 24, 2021 at 09:40:44AM +0200, Maxime Ripard wrote:
> 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?

Anyone? I can ask around for reviews on DRM, but I'd really like some
reviews on the clock patches here..

Maxime

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