Hi, Neil:
Neil Armstrong <narmstrong@xxxxxxxxxxxx> 於 2021年4月9日 週五 下午4:43寫道：
>
> On MT8167, only CEA modes and anything using a clock below 148500 is
> supported for HDMI. This change adds some checks to make sure the
> video format is OK for MT8167.
I think this patch should be separated to 3 patches. check CEA mode,
check clock, add mt8167 hdmi support.
>
> Signed-off-by: Fabien Parent <fparent@xxxxxxxxxxxx>
> Signed-off-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
> ---
> drivers/gpu/drm/mediatek/mtk_hdmi.c | 17 +++++++++++++++++
> 1 file changed, 17 insertions(+)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
> index 8ee55f9e2954..991e2e935b93 100644
> --- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
> @@ -148,6 +148,8 @@ struct hdmi_audio_param {
>
> struct mtk_hdmi_conf {
> bool tz_disabled;
> + unsigned long max_mode_clock;
> + bool cea_modes_only;
> };
>
> struct mtk_hdmi {
> @@ -1259,6 +1261,13 @@ static int mtk_hdmi_conn_mode_valid(struct drm_connector *conn,
> return MODE_BAD;
> }
>
> + if (hdmi->conf->cea_modes_only && !drm_match_cea_mode(mode))
> + return MODE_BAD;
> +
> + if (hdmi->conf->max_mode_clock &&
> + mode->clock > hdmi->conf->max_mode_clock)
> + return MODE_CLOCK_HIGH;
> +
> if (mode->clock < 27000)
> return MODE_CLOCK_LOW;
> if (mode->clock > 297000)
> @@ -1810,10 +1819,18 @@ static const struct mtk_hdmi_conf mtk_hdmi_conf_mt2701 = {
> .tz_disabled = true,
> };
>
> +static const struct mtk_hdmi_conf mtk_hdmi_conf_mt8167 = {
> + .max_mode_clock = 148500,
> + .cea_modes_only = true,
> +};
> +
> static const struct of_device_id mtk_drm_hdmi_of_ids[] = {
> { .compatible = "mediatek,mt2701-hdmi",
> .data = &mtk_hdmi_conf_mt2701,
> },
> + { .compatible = "mediatek,mt8167-hdmi",
"mediatek,mt8167-hdmi" does not exist in binding document, so add this
to binding document first.
In addition, could you also transfer mediatek,hdmi.txt to yaml format?
Regards,
Chun-Kuang.
> + .data = &mtk_hdmi_conf_mt8167,
> + },
> { .compatible = "mediatek,mt8173-hdmi",
> },
> {}
> --
> 2.25.1
>
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