Re: [PATCH 1/2] drm/panel: Add Starry KR070PE2T

[Pascal Roeleven]

On 2020-03-10 19:54, Sam Ravnborg wrote:
> A few things to improve.
>
> The binding should be a separate patch.
> subject - shall start with dt-bindings:
> Shall be sent to deveicetree mailing list.

Hi Sam,

Thank you very much for your review.
I did consider this. The reason I combined the patches, is that the 
binding depends on the display so I thought they were related in some 
way. Didn't know the correct procedure to handle this. I will split them 
apart in v2.

> > ---
> >  .../display/panel/starry,kr070pe2t.txt        |  7 +++++
> >  drivers/gpu/drm/panel/panel-simple.c          | 26 
> > +++++++++++++++++++
> >  2 files changed, 33 insertions(+)
> >  create mode 100644 
> > Documentation/devicetree/bindings/display/panel/starry,kr070pe2t.txt
> >
> > diff --git 
> > a/Documentation/devicetree/bindings/display/panel/starry,kr070pe2t.txt 
> > b/Documentation/devicetree/bindings/display/panel/starry,kr070pe2t.txt
> > new file mode 100644
> > index 000000000..699ad5eb2
> > --- /dev/null
> > +++ 
> > b/Documentation/devicetree/bindings/display/panel/starry,kr070pe2t.txt
> > @@ -0,0 +1,7 @@
> > +Starry 7" (800x480 pixels) LCD panel
> > +
> > +Required properties:
> > +- compatible: should be "starry,kr070pe2t"
> > +
> > +This binding is compatible with the simple-panel binding, which is 
> > specified
> > +in simple-panel.txt in this directory.
> > diff --git a/drivers/gpu/drm/panel/panel-simple.c 
> > b/drivers/gpu/drm/panel/panel-simple.c
> > index e14c14ac6..027a2612b 100644
> > --- a/drivers/gpu/drm/panel/panel-simple.c
> > +++ b/drivers/gpu/drm/panel/panel-simple.c
> > @@ -2842,6 +2842,29 @@ static const struct panel_desc 
> > shelly_sca07010_bfn_lnn = {
> >  	.bus_format = MEDIA_BUS_FMT_RGB666_1X18,
> >  };
> >
> > +static const struct drm_display_mode starry_kr070pe2t_mode = {
> > +	.clock = 33000,
> > +	.hdisplay = 800,
> > +	.hsync_start = 800 + 209,
> > +	.hsync_end = 800 + 209 + 1,
> > +	.htotal = 800 + 209 + 1 + 45,
> > +	.vdisplay = 480,
> > +	.vsync_start = 480 + 22,
> > +	.vsync_end = 480 + 22 + 1,
> > +	.vtotal = 480 + 22 + 1 + 22,
> > +	.vrefresh = 60,
> > +};
>
> Please adjust so:
> vrefresh * htotal * vtotal == clock.
> I cannot say what needs to be adjusted.
> But we are moving away from specifying vrefresh and want the
> data to be OK.

Just like Ville SyrjÃlÃ, I ran the numbers and vrefresh indeed 
calculates to 59.58.