Hi Jose,
On Friday 09 Jun 2017 13:53:12 Jose Abreu wrote:
> On 09-06-2017 12:04, Jose Abreu wrote:
> > Currently HDMI 2.0 PHYs do not have a default configuration function.
> >
> > As these PHYs have the same register layout as the 3D PHYs we can
> > safely use the default configuration function.
>
> I may have been a little to fast arriving at this conclusion. I
> mean most of the registers match but in the configuration
> function there are registers that do not match. Did you actually
> test this configuration function with an HDMI 2.0 phy? And did
> you test with different video modes? From my experience the phy
> may be wrongly configured and sometimes work anyway.
>
> Do please retest with as many video modes as you can and give me
> your phy ID (read from controller config reg HDMI_CONFIG2_ID).
The Renesas R-Car Gen3 HDMI PHY reports an DWC HDMI 2.0 TX PHY ID, but has a
configuration function (rcar_hdmi_phy_configure() in drivers/gpu/drm/rcar-
du/rcar_dw_hdmi.c) that doesn't match hdmi_phy_configure_dwc_hdmi_3d_tx().
>From the information I have been given the layout of the configuration
registers haven't been changed by Renesas. I know we've briefly discussed this
in the past, but I'd appreciate if you could have a second look and tell me
what you think.
> > If, for some reason,
> >
> > the PHY is custom this change will not make any impact because
> > in configuration function we prefer the pdata provided configuration
> > function over the internal one.
> >
> > This patch is based on today's drm-misc-next branch.
> >
> > Signed-off-by: Jose Abreu <joabreu@xxxxxxxxxxxx>
> > Cc: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx>
> > Cc: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>
> > Cc: Archit Taneja <architt@xxxxxxxxxxxxxx>
> > Cc: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
> > Cc: Mark Yao <mark.yao@xxxxxxxxxxxxxx>
> > Cc: Carlos Palminha <palminha@xxxxxxxxxxxx>
> > ---
> >
> > drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 1 +
> > 1 file changed, 1 insertion(+)
> >
> > diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> > b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c index ead1124..10c8d8c 100644
> > --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> > +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> > @@ -2170,6 +2170,7 @@ static irqreturn_t dw_hdmi_irq(int irq, void
> > *dev_id)
> > .name = "DWC HDMI 2.0 TX PHY",
> > .gen = 2,
> > .has_svsret = true,
> > + .configure = hdmi_phy_configure_dwc_hdmi_3d_tx,
> > }, {
> > .type = DW_HDMI_PHY_VENDOR_PHY,
> > .name = "Vendor PHY",
--
Regards,
Laurent Pinchart
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