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[104.57.184.186]) by smtp.gmail.com with ESMTPSA id 586e51a60fabf-307a717f0c9sm8174531fac.13.2025.08.11.20.11.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 11 Aug 2025 20:11:51 -0700 (PDT) From: Bjorn Andersson Date: Mon, 11 Aug 2025 22:11:35 -0500 Subject: [PATCH 3/3] arm64: dts: qcom: sc7280: Add MDSS_CORE reset to mdss Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250811-sc7280-mdss-reset-v1-3-83ceff1d48de@oss.qualcomm.com> References: <20250811-sc7280-mdss-reset-v1-0-83ceff1d48de@oss.qualcomm.com> In-Reply-To: <20250811-sc7280-mdss-reset-v1-0-83ceff1d48de@oss.qualcomm.com> To: Bjorn Andersson , Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Conor Dooley , cros-qcom-dts-watchers@chromium.org, Konrad Dybcio Cc: linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Bjorn Andersson X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1116; i=bjorn.andersson@oss.qualcomm.com; h=from:subject:message-id; bh=iWKr94l4C+wGOu32iC4kUTBBxAFqi2csewiI06tugUg=; b=owEBgwJ8/ZANAwAIAQsfOT8Nma3FAcsmYgBomrDzaYgQuecT1vAEY3V2vVAU4NXEVxfTC/6Rd umxP8mPc2yJAkkEAAEIADMWIQQF3gPMXzXqTwlm1SULHzk/DZmtxQUCaJqw8xUcYW5kZXJzc29u QGtlcm5lbC5vcmcACgkQCx85Pw2ZrcUNdQ//Wo+tahejLl4GZM4AoSOTHfuxsT5do+dilLRbHjj rdlqhoxNSr6ugRG+IFq3m+xUg/cL17pSIt2PQggpfaBznLV3VgtOZPGLvmsJZ/3KVPPwRL1DR/t ckdcgUOkAD25rsyP3bnXRXl3aqXY0CUhlClw8+at9jnhamIcJRI5Mc9wNgNL8uy7zCA91xNNULs BkqUL2MSm308aA8f1Wj+zDdYysdI2NejeHe+0UqP491ef0a+vUz2qRDNnDd0a8QXk9HucIKv4R4 peWyzOYP92ejK3pShm/s6xOi22trMjqeo1s0Xu570z0bRwQ84E65WG1CH5xQ9CHNW/bAtN8GFsb ur68QWvSlkA96KJqIjDEFm8t8QxbhsO2qK+NIgnsWXYaU5IhxhjCZp/BS6SYHCO2CmYFlPwthIs ZlsKDh6RTr6WTnv+8NRn0AGNxSZeZ/t50RzToI83E4PgXCEolh28d+aUg7KV95VDq3pDM7dCWuS SvJ3KeG21pUC7uYkwNaG61r+ESsGdrBd7kJiMeiRLtAIRFKabW8CUabwu2RK5hWZBQjNa6p2m3p rsGp53CmSxmGIvsxNWFVA2r9q7mB4qD4g+ckKg2AobCz9aFfHF+B8WK2Q8PSBkO67laYa+TlPTj fRepVQHRPrPKQs62ZvsXEfXmAJCGHZzmlGcj9EDTk6zg= X-Developer-Key: i=bjorn.andersson@oss.qualcomm.com; a=openpgp; fpr=05DE03CC5F35EA4F0966D5250B1F393F0D99ADC5 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwODEwMDA1NyBTYWx0ZWRfX2PxkbIwa2LHQ Z0LRfIld66erezxO8FqayA7AejgRqT0vGx2EojThVV2GsTZQEOtck0HMvRbQt3WcvpWymGBwyZf HX5dwXb5+uIIYF6nLCrdkrXijV4flVucaGF4D//Gf+92NmdYBAhS/vsSajvaMCilT4oZReAtkAa V6TdKU3YF7wVmzFJtxGm96Lzq+xlt5nDZYeiv3n4wQKCH6e4Y18fQHEHvNB3YSMYFeNbo+/Znqx 28dBw7YEheVy00uW5lpjLhFw0JMpeSE5PFH/K3TG4jpkaD971fNUAiqQqLXMCxg7tIOnp/SF2eh waUClKNTEu13qJCH8dJ5+uTpeYkZ8k5dXQhJG1+fImzo0u8f56NmT+v1BBNDOeGl2cWcxBngxjT 4RugfB4a X-Proofpoint-GUID: ciVxV3LxSygS5OT0oFB1rvarW-3rvv0h X-Authority-Analysis: v=2.4 cv=aYNhnQot c=1 sm=1 tr=0 ts=689ab0f8 cx=c_pps a=nSjmGuzVYOmhOUYzIAhsAg==:117 a=DaeiM5VmU20ml6RIjrOvYw==:17 a=IkcTkHD0fZMA:10 a=2OwXVqhp2XgA:10 a=EUspDBNiAAAA:8 a=dOedmflVD102KoYFdoYA:9 a=QEXdDO2ut3YA:10 a=1zu1i0D7hVQfj8NKfPKu:22 X-Proofpoint-ORIG-GUID: ciVxV3LxSygS5OT0oFB1rvarW-3rvv0h X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-08-12_01,2025-08-11_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 adultscore=0 priorityscore=1501 suspectscore=0 phishscore=0 impostorscore=0 bulkscore=0 malwarescore=0 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2507300000 definitions=main-2508100057 Like on other platforms, if the OS does not support recovering the state left by the bootloader it needs access to MDSS_CORE, so that it can clear the MDSS configuration. Until now it seems no version of the bootloaders have done so, but e.g. the Particle Tachyon ships with a bootloader that does leave the display in a state that results in a series of iommu faults. So let's provide the reset, to allow the OS to clear that state. Signed-off-by: Bjorn Andersson Reviewed-by: Konrad Dybcio --- arch/arm64/boot/dts/qcom/sc7280.dtsi | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qco= m/sc7280.dtsi index 64a2abd3010018e94eb50c534a509d6b4cf2473b..5eafcb84cd452ecc758922b6977= 4837e9f5a899a 100644 --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi @@ -4724,6 +4724,8 @@ &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ALWAYS>, =20 iommus =3D <&apps_smmu 0x900 0x402>; =20 + resets =3D <&dispcc DISP_CC_MDSS_CORE_BCR>; + #address-cells =3D <2>; #size-cells =3D <2>; ranges; --=20 2.49.0