[PATCH 08/22] drm/tegra: dc: Drop the reset asserts to workaround a bug

[Thierry Reding]

On Tue, Jun 13, 2017 at 05:18:37PM +0300, Dmitry Osipenko wrote:
> On 13.06.2017 16:45, Thierry Reding wrote:
> > On Tue, May 23, 2017 at 03:14:23AM +0300, Dmitry Osipenko wrote:
> >> Commit 33a8eb8 ("Implement runtime PM") introduced HW reset control. It
> >> causes a hang on Tegra20 if both display controllers are utilized (RGB
> >> panel and HDMI). The TRM suggests that each display controller has its own
> >> reset control, apparently it is not correct. Let's remove the interaction
> >> with the resets for now as a workaround.
> >>
> >> Fixes: 33a8eb8d40ee ("drm/tegra: dc: Implement runtime PM")
> >> Signed-off-by: Dmitry Osipenko <digetx at gmail.com>
> >> ---
> >>  drivers/gpu/drm/tegra/dc.c | 15 ---------------
> >>  1 file changed, 15 deletions(-)
> > 
> > Do you mind if I parameterize this to restrict omission of the assert
> > and deassert to Tegra20? I'm fairly sure that these resets are important
> > on later chips in order to properly reset the display controllers.
> 
> I don't mind at all, I can parameterize it in the next rev myself if you wish.

Sure, why not.

Thierry
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