Re: [PATCH v2 08/10] drm/simpledrm: Acquire clocks from DT device node

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On Thu, Apr 15, 2021 at 01:02:44PM +0200, Thomas Zimmermann wrote:
> Hi
> 
> Am 15.04.21 um 11:21 schrieb Maxime Ripard:
> > Hi,
> > 
> > On Thu, Apr 15, 2021 at 09:31:01AM +0200, Thomas Zimmermann wrote:
> > > Am 08.04.21 um 10:13 schrieb Maxime Ripard:
> > > > Hi,
> > > > 
> > > > On Thu, Mar 18, 2021 at 11:29:19AM +0100, Thomas Zimmermann wrote:
> > > > > Make sure required hardware clocks are enabled while the firmware
> > > > > framebuffer is in use.
> > > > > 
> > > > > The basic code has been taken from the simplefb driver and adapted
> > > > > to DRM. Clocks are released automatically via devres helpers.
> > > > > 
> > > > > Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
> > > > > Tested-by: nerdopolis <bluescreen_avenger@xxxxxxxxxxx>
> > > > 
> > > > Even though it's definitely simpler to review, merging the driver first
> > > > and then the clocks and regulators will break bisection on the platforms
> > > > that rely on them
> > > 
> > > I'd like to keep the patches separate for now, but can squash patches 6 to 8
> > > them into one before pushing them. OK?
> > 
> > Yep, that works for me :)
> > 
> > > > 
> > > > Another thing worth considering is also that both drivers will probe if
> > > > they are enabled (which is pretty likely), which is not great :)
> > > > 
> > > > I guess we should make them mutually exclusive through Kconfig
> > > 
> > > We already have several drivers in fbdev and DRM that handle the same
> > > hardware. We don't do this for any other pair, why bother now?
> > 
> > Yeah, but simplefb/simpledrm are going to be enabled pretty much
> > everywhere, as opposed to the other drivers that are more specialized.
> 
> Well, OK. But I'd like to give simpledrm preference over simplefb. There
> should be an incentive to switch to DRM.

Yeah that makes total sense :)

Maxime

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