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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-af91a0753f9sm2178410966b.20.2025.08.12.01.48.25 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 12 Aug 2025 01:48:27 -0700 (PDT) Message-ID: <61a781d3-eb4f-4c56-8873-41c95999630f@oss.qualcomm.com> Date: Tue, 12 Aug 2025 10:48:24 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 3/3] arm64: dts: qcom: sc7280: Add MDSS_CORE reset to mdss To: Bjorn Andersson , 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 References: <20250811-sc7280-mdss-reset-v1-0-83ceff1d48de@oss.qualcomm.com> <20250811-sc7280-mdss-reset-v1-3-83ceff1d48de@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20250811-sc7280-mdss-reset-v1-3-83ceff1d48de@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=X4lSKHTe c=1 sm=1 tr=0 ts=689affdd cx=c_pps a=WeENfcodrlLV9YRTxbY/uA==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=2OwXVqhp2XgA:10 a=EUspDBNiAAAA:8 a=S_9igCkNjxJcElqm350A:9 a=QEXdDO2ut3YA:10 a=zZCYzV9kfG8A:10 a=kacYvNCVWA4VmyqE58fU:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwODA5MDAzMSBTYWx0ZWRfX02xboKjB4quJ l8FNx92iWvFxsTJHpU4VbFzx9zldczJqSekO9+9kJnJzcWWyqRp/mDBOSseneECWQEVXJPa6MD8 NbjN3/q5+IKctmQViY9YvZy9MDRhFJIQ3fkce71GBT6NGuSWf2xubr2zwZ8DAF1hx6ZtyQJkLtS hUJfEFdwfEroaf6CkR0w45hEeii8t0H97aZ8emTepT30upj3x6xkUojqlmPyGzBSvTtGQfmPmmS TixBr5HZXjycb8rpQryBa+IvB67ftX9PcSwTf4GTbJ2G0NbkiYhZgW+pybNHaesBe8P9frduqbo cT5SDuP8nzZTdSN1Zl5XWwkV7sNlBo5Mb3Q09pLg3fk1wvQ3W8zLwbv5jyQA1pb/ObIb+wqFwA2 X9VN52Pr X-Proofpoint-GUID: D_YkqOuryr1tw_Pgdh59LxRsF6sE9w85 X-Proofpoint-ORIG-GUID: D_YkqOuryr1tw_Pgdh59LxRsF6sE9w85 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_04,2025-08-11_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 priorityscore=1501 clxscore=1015 malwarescore=0 adultscore=0 spamscore=0 bulkscore=0 suspectscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2507300000 definitions=main-2508090031 On 8/12/25 5:11 AM, Bjorn Andersson wrote: > 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 Konrad