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Mon, 12 Apr 2021 02:39:38 -0700 (PDT) From: Neil Armstrong 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 , Fabien Parent 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 Message-Id: <20210412093928.3321194-5-narmstrong@baylibre.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210412093928.3321194-1-narmstrong@baylibre.com> References: <20210412093928.3321194-1-narmstrong@baylibre.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210412_023940_080315_BDAC7086 X-CRM114-Status: GOOD ( 13.27 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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 Signed-off-by: Neil Armstrong --- 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)