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Mon, 19 Apr 2021 00:33:03 -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 v3 4/5] gpu/drm: mediatek: hdmi: add optional limit on maximal HDMI mode clock Date: Mon, 19 Apr 2021 09:32:43 +0200 Message-Id: <20210419073244.2678688-5-narmstrong@baylibre.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210419073244.2678688-1-narmstrong@baylibre.com> References: <20210419073244.2678688-1-narmstrong@baylibre.com> MIME-Version: 1.0 X-Patch-Hashes: v=1; h=sha256; i=fmerdT5sHqIGuoUTZDrccRl/0zoMQFtVjUuTCnM2Nu4=; m=kS8rkVG4drN6qA/sYwEi96Os3BdhRRg85LscWfEOz9U=; p=XzRamrwQ2kdOF7GfyCvXP4CcM6GKIYyeek0NDT5Wv0U=; g=cc05bb87977587a07030f409f3d9b83309a9f1c7 X-Patch-Sig: m=pgp; i=narmstrong@baylibre.com; s=0xA4CFF8AE; b=iQIzBAABCgAdFiEEPVPGJshWBf4d9CyLd9zb2sjISdEFAmB9MgwACgkQd9zb2sjISdGlFg//d/P CVZrkoJp/X4KUj/7Z+BhPfopOjq0Wiun0RiLoVicfOFVE23BrE2jif6szo9bLnddyzHnqRC/LOmDG sQEiX89TVIsnsasXsRPGFbHqMgpdzHdZeg0JVUEkacKc7WObdzdorYa7E1Sy85lkLQQFZERYRxIYs x7l8Rfn+fYO0g/2bM5Xo39BN+vjktqt2Z6+jf8PMaNHdWHbZ/Sibggehilqv1gvbNGzArviBVbogb CzbuFkm4caJlGpyuOh9lzqb5oX1dS1b4sJOKlV0vab8riyRDSWIrvSve6lIJKS5Zy2nnePFJDRIdo KXCX8tTjJ3oR9eFt0I6uDo1tPnQNUN+I+YPiwH1ADYzFZe/l6jgrmJ8vmD3sEPsqu8StxA2C97stl kPJjY6S3CSQAwoWUiXOY06ExKPKQdzJlilfy0bwmBllmpHeaV2AgOUw/SUVZQKFLQ8gy0dHTgCuhJ xtYcQKSob+AoJUPLuKlkJ5rWm7DvsLQ59ZkIVczynpm5b+fxtQtAwgFXqqcVrOe/BwQGzcTkG+w69 g3JFk9Jgf3DMbQ9SL1gKIdDr+DqyBPjvgu2XxQk+4d8A8MV36AQpEUTrF5WKJnf6aM9l7TIUr8hOw vDn318ylmunNTWomQl7CBbWMUxB26/KBGzy/HJ/rlIaRskMmDaGmzSMMQQD2KUYs= Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.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) -- 2.25.1