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[122.58.25.162]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-36a7212aa06sm428572a91.3.2026.05.21.23.07.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 21 May 2026 23:07:06 -0700 (PDT) From: Graham O'Connor To: linux-arm-msm@vger.kernel.org Cc: andersson@kernel.org, konradybcio@kernel.org, robin.clark@oss.qualcomm.com, lumag@kernel.org, abhinav.kumar@linux.dev, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Graham O'Connor Subject: [PATCH 0/6] arm64: qcom: Enable additional hardware on Radxa Dragon Q6A Date: Fri, 22 May 2026 18:06:39 +1200 Message-ID: <20260522060645.4399-1-graham.oconnor@gmail.com> X-Mailer: git-send-email 2.53.0 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 Radxa Dragon Q6A is a compact single-board computer based on the Qualcomm QCS6490 SoC (sc7280 family). A basic DTS for this board already exists in mainline. This series enables the remaining hardware and fixes platform-specific issues required for correct operation when booting via UEFI firmware. Patches 1-3 fix platform issues affecting QCS6490 boards booting via UEFI firmware: - The RSC hardware solver is left active by the UEFI firmware, causing a security violation if the kernel attempts to reinitialize it. - EFI variable access requires the board compatible string in the SCM allowlist. - The RA620 DP-to-HDMI bridge does not complete link training at voltage swing level 3. Capping at level 2 matches the vendor kernel behaviour and allows HDMI output to work correctly. Patches 4-6 add DTS nodes enabling: - GPU (Adreno 643) with clock controller and GMU - DisplayPort output via RA620 passive DP-to-HDMI bridge - USB3 SuperSpeed via the QMP combo PHY shared with DisplayPort The following has been confirmed working on this board with mainline drivers: - KDE Plasma 6.6.5 desktop on Wayland with GPU acceleration - HDMI display output via RA620 passive DP-to-HDMI bridge - USB3 SuperSpeed (5Gbps confirmed via lsusb) - OpenGL 4.6 and Vulkan 1.3 via Mesa Freedreno/Turnip - Hardware video decode/encode via Venus (H.264, HEVC, VP9, MPEG-2) - Audio via WCD938x codec (headphone output, microphone, HDMI audio) - FastRPC interface to Hexagon DSP available (/dev/fastrpc-cdsp) though inference workloads have not been tested With the out-of-tree AIC8800 driver for the onboard Quectel FCU760K WiFi/BT module, all remaining hardware on the board is functional under mainline Linux. Tested on Radxa Dragon Q6A (QCS6490) with mainline Linux 7.0.9. Graham O'Connor (6): soc: qcom: rpmh-rsc: Skip TCS init when RSC is managed by firmware firmware: qcom: scm: Allow EFI variable access on Radxa Dragon Q6A drm/msm/dp: Limit voltage swing level to 2 for RA620 bridge arm64: dts: qcom: qcs6490-radxa-dragon-q6a: Add regulator supplies and disable EUD arm64: dts: qcom: qcs6490-radxa-dragon-q6a: Enable GPU and display pipeline arm64: dts: qcom: qcs6490-radxa-dragon-q6a: Enable USB3 SuperSpeed .../dts/qcom/qcs6490-radxa-dragon-q6a.dts | 176 ++++++++++++++++++ drivers/firmware/qcom/qcom_scm.c | 1 + drivers/gpu/drm/msm/dp/dp_link.h | 2 +- drivers/soc/qcom/rpmh-rsc.c | 14 ++ 4 files changed, 192 insertions(+), 1 deletion(-) -- 2.53.0