From: Neil Armstrong <narmstrong@baylibre.com>
To: chunkuang.hu@kernel.org, p.zabel@pengutronix.de, matthias.bgg@gmail.com
Cc: dri-devel@lists.freedesktop.org,
linux-mediatek@lists.infradead.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Neil Armstrong <narmstrong@baylibre.com>,
Fabien Parent <fparent@baylibre.com>
Subject: [PATCH v2 4/5] gpu/drm: mediatek: hdmi: add optional limit on maximal HDMI mode clock
Date: Mon, 12 Apr 2021 11:39:27 +0200 [thread overview]
Message-ID: <20210412093928.3321194-5-narmstrong@baylibre.com> (raw)
In-Reply-To: <20210412093928.3321194-1-narmstrong@baylibre.com>
Some SoCs like the MT8167 have a hard limit on the maximal supported HDMI TMDS
clock, so add a configuration value to filter out those modes.
Signed-off-by: Fabien Parent <fparent@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
drivers/gpu/drm/mediatek/mtk_hdmi.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
index 0539262e69d3..bc50d97f2553 100644
--- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
+++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
@@ -149,6 +149,7 @@ struct hdmi_audio_param {
struct mtk_hdmi_conf {
bool tz_disabled;
bool cea_modes_only;
+ unsigned long max_mode_clock;
};
struct mtk_hdmi {
@@ -1226,6 +1227,10 @@ static int mtk_hdmi_bridge_mode_valid(struct drm_bridge *bridge,
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)
--
2.25.1
next prev parent reply other threads:[~2021-04-12 9:52 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-12 9:39 [PATCH v2 0/5] mediatek: hdmi: add MT8167 configuration Neil Armstrong
2021-04-12 9:39 ` [PATCH v2 1/5] dt-bindings: display: mediatek,hdmi: Convert to use graph schema Neil Armstrong
2021-04-12 13:20 ` [PATCH v2 1/5] dt-bindings: display: mediatek, hdmi: " Rob Herring
2021-04-12 15:52 ` [PATCH v2 1/5] dt-bindings: display: mediatek,hdmi: " Neil Armstrong
2021-04-12 9:39 ` [PATCH v2 2/5] dt-bindings: mediatek: add mt8167 to hdmi, hdmi-ddc and cec bindings Neil Armstrong
2021-04-12 9:39 ` [PATCH v2 3/5] gpu/drm: mediatek: hdmi: add check for CEA modes only Neil Armstrong
2021-04-12 9:39 ` Neil Armstrong [this message]
2021-04-12 9:39 ` [PATCH v2 5/5] gpu/drm: mediatek: hdmi: add MT8167 configuration Neil Armstrong
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