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Sat, 10 Oct 2026 04:55:48 -0700 (PDT) Received: from luca-vm.lan ([154.61.61.58]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48db9aca657sm8746340f8f.43.2026.10.10.04.55.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 10 Oct 2026 04:55:47 -0700 (PDT) From: Luca Leonardo Scorcia To: linux-mediatek@lists.infradead.org Cc: Luca Leonardo Scorcia , Chunfeng Yun , Vinod Koul , Neil Armstrong , Manivannan Sadhasivam , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Matthias Brugger , AngeloGioacchino Del Regno , Stephen Boyd , Brian Masney , Jerome Brunet , Chun-Kuang Hu , Philipp Zabel , David Airlie , Simona Vetter , Nicolas Frattaroli , Chen-Yu Tsai , Fabien Parent , CK Hu , chunhui dai , linux-arm-kernel@lists.infradead.org, linux-phy@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, dri-devel@lists.freedesktop.org Subject: [PATCH 0/7] Add support for Mediatek mt8167 HDMI display output Date: Sat, 10 Oct 2026 13:54:00 +0200 Message-ID: <20261010115539.9237-1-l.scorcia@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The MediaTek mt8167 SoC supports HDMI output via a dedicated HDMI PHY driven by the DPI1 display block. Support for HDMI output was partially upstreamed in 2021, but is currently not functional as it's missing its HDMI PHY driver. The HDMI PHY is apparently similar to the mt2701 one, but some differences in timings and in the initialization sequence are better expressed with a separate driver. * Patch 1, 2 add support for the HDMI PHY. In addition to the HDMI PHY, a few fixes are required here and there to actually get HDMI output. * Patch 3: Some of the HDMI registers are mapped into the apmixedsys syscon. Since they are manipulated inside the HDMI PHY driver, we change the apmixedsys memory map to non exclusive by switching it from devm_platform_ioremap_resource to of_iomap. This approach was copied from mt8173 apmixedsys syscon. * Patch 4: Since the DPI1 interface is hardwired to the HDMI PHY, it is appropriate for the HDMI PHY to control the DPI1 clocks. There is no effect on DPI0 clocks as they're completely separate. * Patch 5: Some MediaTek SoCs require a supervisor call to enable HDMI output. mt8167 is not one of those. * Patch 6: In the common path for mt2701/mt8167, a register operation that is meant to enable the HDMI_PSECUR_EN bit is actually touching some other bits that are set by later operations anyway. The patch makes more explicit the intent of the operation by setting only the necessary bit. * Patch 7: Adds the device tree nodes to the mt8167 dtsi. Since DPI1 is hardwired to HDMI it is possible to bind the input port of the HDMI node to the output port of DPI1, but the patch that adds the DPI nodes to the DTSI [1] has not been picked up yet, so we leave it disconnected for now. The series was tested at all supported resolutions on the Sony PlayStation Classic Mini. [1] https://lore.kernel.org/linux-mediatek/20260921113914.779393-5-l.scorcia@gmail.com/ Luca Leonardo Scorcia (7): dt-bindings: mediatek: hdmi-phy: Add compatible for mt8167 phy: mediatek: hdmi: Add support for mt8167 clk: mediatek: mt8167: Map apmixedsys iomem as shared clk: mediatek: mt8167: Correct HDMI-related clock definitions drm/mediatek: mtk_hdmi: Set tz_disabled for mt8167 drm/mediatek: mtk_hdmi: Improve the secure output bit toggle arm64: dts: mediatek: mt8167: Add HDMI display nodes .../bindings/phy/mediatek,hdmi-phy.yaml | 1 + arch/arm64/boot/dts/mediatek/mt8167.dtsi | 62 +++++ drivers/clk/mediatek/clk-mt8167-apmixedsys.c | 26 ++- drivers/clk/mediatek/clk-mt8167.c | 6 +- drivers/gpu/drm/mediatek/mtk_hdmi.c | 3 +- drivers/gpu/drm/mediatek/mtk_hdmi_regs.h | 1 + drivers/phy/mediatek/Makefile | 1 + drivers/phy/mediatek/phy-mtk-hdmi-mt8167.c | 217 ++++++++++++++++++ drivers/phy/mediatek/phy-mtk-hdmi.c | 3 + drivers/phy/mediatek/phy-mtk-hdmi.h | 1 + 10 files changed, 314 insertions(+), 7 deletions(-) create mode 100644 drivers/phy/mediatek/phy-mtk-hdmi-mt8167.c base-commit: a90ee4305c4a5df72c11b31dacfdc76e00fcf78a -- 2.43.0