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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-6411f713959sm15601265a12.5.2025.11.12.02.59.57 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 12 Nov 2025 03:00:00 -0800 (PST) Message-ID: Date: Wed, 12 Nov 2025 11:59:56 +0100 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 v2 11/21] drm/msm/a6xx: Improve MX rail fallback in RPMH vote init To: Akhil P Oommen , Rob Clark , Bjorn Andersson , Konrad Dybcio , Sean Paul , Dmitry Baryshkov , Abhinav Kumar , Jessica Zhang , Marijn Suijten , David Airlie , Simona Vetter , Jonathan Marek , Jordan Crouse , Will Deacon , Robin Murphy , Joerg Roedel , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Connor Abbott Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, iommu@lists.linux.dev, devicetree@vger.kernel.org References: <20251110-kaana-gpu-support-v2-0-bef18acd5e94@oss.qualcomm.com> <20251110-kaana-gpu-support-v2-11-bef18acd5e94@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20251110-kaana-gpu-support-v2-11-bef18acd5e94@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: 8r160xaJgjCWFaQwxZqcaR3oKKf7ggVR X-Proofpoint-ORIG-GUID: 8r160xaJgjCWFaQwxZqcaR3oKKf7ggVR X-Authority-Analysis: v=2.4 cv=acRsXBot c=1 sm=1 tr=0 ts=691468b5 cx=c_pps a=50t2pK5VMbmlHzFWWp8p/g==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=6UeiqGixMTsA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=sL9_24WXM6ABxRF1V6wA:9 a=QEXdDO2ut3YA:10 a=IoWCM6iH3mJn3m4BftBB:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTEyMDA4NyBTYWx0ZWRfX80Q30SQKO/+t Au3SDgezBt1fIYEU2Ot67nHG3kZ96x/mqCDRUv7/O3mWrJokaHzrRaRg0ShmLspOqYj9S0GnNOt LUuPwKLWRB/fvrBahHwrjreQcIyCtVEGddLUjJ7PyHoOA0xVYdi9GbreQsKrX/SMZ8HGw9J+42y HufGtlscgpZ3VRCRLFKoxIbaBUJ4AADZd8R62q7+u2dFu5hac3Pr97dwXmMoSyvGLJ455eALubT 5KXetpGo5fbZkpYyOfzbYdAQ/7evKeTxrHyyM5tZ3qf/y2gFsENUIKzhoj441/Ef0nGn+w+eJhW sdlyOa0bSty3M5tvNC4almc0Na5QgMlftxMbvDlw+0MxWP+aGWXFi+jl4mptpwqRMslcu6gwFdf sbC6m3f3P0AueBedm2d9Nr9FAHMGQA== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-11-12_03,2025-11-11_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 phishscore=0 bulkscore=0 clxscore=1015 spamscore=0 lowpriorityscore=0 malwarescore=0 adultscore=0 impostorscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2510240001 definitions=main-2511120087 On 11/10/25 5:37 PM, Akhil P Oommen wrote: > Current logic assumes that the voltage corners in both MxG and MxA are > always same. This is not true for recent targets. So, rework the rpmh init > sequence to probe and calculate the votes with the respective rails, ie, > GX rails should use MxG as secondary rail and Cx rail should use MxA as > the secondary rail. Is GMU always on Mx*A* and never Mx*C*? Konrad