Hi Doug.
On Mon, Jun 01, 2020 at 05:30:53PM -0700, Doug Anderson wrote:
> Hi,
>
> On Mon, Jun 1, 2020 at 1:33 AM Sam Ravnborg <sam@xxxxxxxxxxxx> wrote:
> >
> > This panel is used on evaluation boards for Atmel at91sam9261 and
> > at91sam6263.
> >
> > Signed-off-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
> > Cc: Thierry Reding <thierry.reding@xxxxxxxxx>
> > Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
> > ---
> > drivers/gpu/drm/panel/panel-simple.c | 29 ++++++++++++++++++++++++++++
> > 1 file changed, 29 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
> > index 8624bb80108c..25c96639631f 100644
> > --- a/drivers/gpu/drm/panel/panel-simple.c
> > +++ b/drivers/gpu/drm/panel/panel-simple.c
> > @@ -1813,6 +1813,32 @@ static const struct panel_desc hannstar_hsd100pxn1 = {
> > .connector_type = DRM_MODE_CONNECTOR_LVDS,
> > };
> >
> > +static const struct drm_display_mode hitachi_tx09d71vm1cca_mode = {
> > + .clock = 4965000,
>
> This is the pixel clock in kHz, right? So it runs at almost 5 Terahertz?
>
>
> > + .hdisplay = 240,
> > + .hsync_start = 240 + 0,
> > + .hsync_end = 240 + 0 + 5,
> > + .htotal = 240 + 0 + 5 + 1,
> > + .vdisplay = 320,
> > + .vsync_start = 320 + 0,
> > + .vsync_end = 320 + 0 + 1,
> > + .vtotal = 320 + 0 + 1 + 1,
>
> Some random datasheet I found has really different numbers. If the
> numbers above are what everyone is using then I suppose it's fine,
> just curious why the mismatch.
The timing comes from:
arch/arm/boot/dts/at91sam9263ek.dts - that include display timings for
the panel on the evaluation board.
I did not verify any datasheet - I just blindly copied what was there.
And clock was obviously not properly adjusted to khz.
Will fix in v2 - will also try to find a datasheet this time.
Thanks for noticing!
Sam
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