Hi Heiko,
Thank you for the patch.
On Friday, 16 February 2018 22:41:53 EET Heiko Stuebner wrote:
> In some IP implementations the reading of the phy-type may be broken.
> One example are the Rockchip rk3228 and rk3328 socs that use a separate
> phy from Innosilicon but still report the HDMI20_TX type.
>
> So allow the glue driver to force a specific type, like the vendor-phy
> for these cases.
>
> Signed-off-by: Heiko Stuebner <heiko@xxxxxxxxx>
Tested-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 4 +++-
> include/drm/bridge/dw_hdmi.h | 1 +
> 2 files changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c index
> f9802399cc0d..50d231626c4d 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> @@ -2218,7 +2218,9 @@ static int dw_hdmi_detect_phy(struct dw_hdmi *hdmi)
> unsigned int i;
> u8 phy_type;
>
> - phy_type = hdmi_readb(hdmi, HDMI_CONFIG2_ID);
> + phy_type = (hdmi->plat_data->phy_force_type) ?
> + hdmi->plat_data->phy_force_type :
> + hdmi_readb(hdmi, HDMI_CONFIG2_ID);
No need for parentheses. You could even write this
phy_type = hdmi->plat_data->phy_force_type ?
: hdmi_readb(hdmi, HDMI_CONFIG2_ID);
but that's up to you.
What if a driver wants to force the PHY type to DW_HDMI_PHY_DWC_HDMI_TX_PHY ?
Or do you expect only the DW_HDMI_PHY_VENDOR_PHY type to be forced ? If so, we
could also use a force_vendor_phy boolean field instead of phy_force_type.
> if (phy_type == DW_HDMI_PHY_VENDOR_PHY) {
> /* Vendor PHYs require support from the glue layer. */
> diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
> index dd2a8cf7d20b..3c1dddb09b95 100644
> --- a/include/drm/bridge/dw_hdmi.h
> +++ b/include/drm/bridge/dw_hdmi.h
> @@ -133,6 +133,7 @@ struct dw_hdmi_plat_data {
> const struct dw_hdmi_phy_ops *phy_ops;
> const char *phy_name;
> void *phy_data;
> + u8 phy_force_type;
>
> /* Synopsys PHY support */
> const struct dw_hdmi_mpll_config *mpll_cfg;
--
Regards,
Laurent Pinchart
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