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charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20241008-fix-sm8x50-mdp-icc-v1-2-77ffd361b8de@linaro.org> References: <20241008-fix-sm8x50-mdp-icc-v1-0-77ffd361b8de@linaro.org> In-Reply-To: <20241008-fix-sm8x50-mdp-icc-v1-0-77ffd361b8de@linaro.org> To: Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Neil Armstrong Cc: Abhinav Kumar , Rob Clark , Marijn Suijten , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, freedreno@lists.freedesktop.org, stable@kernel.org X-Mailer: b4 0.14.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1619; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=znBSTsvoia8jtv0vOla1luWvWrIdThhCQ3A7+DTU46M=; b=owEBbQGS/pANAwAKAYs8ij4CKSjVAcsmYgBnBHCeZFq3YI77GP+xE8vYq8jrRhjgLpkER4n3s EJe/us/uoCJATMEAAEKAB0WIQRMcISVXLJjVvC4lX+LPIo+Aiko1QUCZwRwngAKCRCLPIo+Aiko 1S+ZCACjueCogk9kziFFtp2pQBwNgoEJIQOWFaoFCx6WssaAdkVv7aXZZB9N9+b8VXHEpE2XPfd bmvT9i3GzdC+IxJDCl6EjWpnP6MRhvvu+eZaBaIZtkr+MrW+o2BsXiHFt+rcwGzu6qiU4Q1iWYT N0jvH556UF45CesUsd/Pjr8oeL8E0ASt2e3/V8NTiujHTAoBUdEsOKvknFW5k3ZPWEA4LgpFYPS vXUn6zzsTVsuz3YXzGsuiQEtvrvSpfvENMd2JTix0FNJqLIN9iFuXd7mqWkzCBNel66CHeBgsqk W6kyjEqsoVwA/oQxEnmlq1+uggMQ14WFVo+gCL0TaqKxBKWS X-Developer-Key: i=dmitry.baryshkov@linaro.org; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A SM8650 lists two interconnects for the display subsystem, mdp0-mem (between MDP and LLCC) and mdp1-mem (between LLCC and EBI, memory). The second interconnect is a misuse. mdpN-mem paths should be used for several outboud MDP interconnects rather than the path between LLCC and memory. This kind of misuse can result in bandwidth underflows, possibly degradating picture quality as the required memory bandwidth is divided between all mdpN-mem paths (and LLCC-EBI should not be a part of such division). Drop the second path and use direct MDP-EBI path for mdp0-mem until we support separate MDP-LLCC and LLCC-EBI paths. Fixes: 10e024671295 ("arm64: dts: qcom: sm8650: add interconnect dependent = device nodes") Cc: stable@kernel.org Signed-off-by: Dmitry Baryshkov --- arch/arm64/boot/dts/qcom/sm8650.dtsi | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/arch/arm64/boot/dts/qcom/sm8650.dtsi b/arch/arm64/boot/dts/qco= m/sm8650.dtsi index 01ac3769ffa6..455774516b08 100644 --- a/arch/arm64/boot/dts/qcom/sm8650.dtsi +++ b/arch/arm64/boot/dts/qcom/sm8650.dtsi @@ -3455,11 +3455,8 @@ mdss: display-subsystem@ae00000 { resets =3D <&dispcc DISP_CC_MDSS_CORE_BCR>; =20 interconnects =3D <&mmss_noc MASTER_MDP QCOM_ICC_TAG_ALWAYS - &gem_noc SLAVE_LLCC QCOM_ICC_TAG_ALWAYS>, - <&mc_virt MASTER_LLCC QCOM_ICC_TAG_ALWAYS &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ALWAYS>; - interconnect-names =3D "mdp0-mem", - "mdp1-mem"; + interconnect-names =3D "mdp0-mem"; =20 power-domains =3D <&dispcc MDSS_GDSC>; =20 --=20 2.39.5