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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b9c3c9721b6sm532205366b.10.2026.04.07.04.01.44 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 07 Apr 2026 04:01:46 -0700 (PDT) Message-ID: <8f5ffecc-007e-4a8a-9c5e-9994e7841659@oss.qualcomm.com> Date: Tue, 7 Apr 2026 13:01:43 +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 6/6] drm/msm/a6xx: Limit GXPD votes to recovery in A8x To: Taniya Das , Bjorn Andersson , Michael Turquette , Stephen Boyd , Abel Vesa , Rob Clark , Sean Paul , Konrad Dybcio , Akhil P Oommen , Dmitry Baryshkov , Abhinav Kumar , Jessica Zhang , Marijn Suijten , David Airlie , Simona Vetter Cc: Ajit Pandey , Imran Shaik , Jagadeesh Kona , linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org References: <20260407-gfx-clk-fixes-v1-0-4bb5583a5054@oss.qualcomm.com> <20260407-gfx-clk-fixes-v1-6-4bb5583a5054@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20260407-gfx-clk-fixes-v1-6-4bb5583a5054@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDA3MDEwMyBTYWx0ZWRfX3KBqvgILXi3X 02u60Loffojp8+QtKZKQAF7GS1zC4E31q4u4woiFimLqfElCgkBszWE/fnmryZmYQs6vaS+Il0f 7dbf/0/7WuGMdWIqT8gqj54U4Mx+Lw0a/NUeoxEozKTEqhMcd3Q+uXcfigDKHTUJRJUQljhF0OI rr6/U8YjY3RXc6OZkFMCP1um9ssb5QpnS041ovqbx2Xytvft+K/EgOXaf+0AQ5TEeQN9q2cy8hJ 7JMrLIj/lJ/N2n1RW2AhnERm+FQXxeTQb+1PAZkkl8UkmlIDY2+qOATnVyPxX4aJzMgKFXhx4GM 5EbeggAVkdWx6nDKTiJMAKtHB3A8vrud3UchIsvWEnUYMbX9cuPnm8OtnSt/+kxR+YDpJXmruCc UnD9cLMq9mM97kc3JJzeSrCMCjhzUlG+mjZpH5umSNhdVxAnhVQl64ga6L08/7jZYAGfEKZMXKj jJqstNJ8pK3kKI2gt0w== X-Proofpoint-ORIG-GUID: cSASrPEZgutBQjAIVuGmdwL8TrTcUERM X-Authority-Analysis: v=2.4 cv=WNZPmHsR c=1 sm=1 tr=0 ts=69d4e41c cx=c_pps a=UgVkIMxJMSkC9lv97toC5g==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=Um2Pa8k9VHT-vaBCBUpS:22 a=EUspDBNiAAAA:8 a=eR-y9ft8gFT6PtJfczAA:9 a=QEXdDO2ut3YA:10 a=1HOtulTD9v-eNWfpl4qZ:22 X-Proofpoint-GUID: cSASrPEZgutBQjAIVuGmdwL8TrTcUERM X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-07_02,2026-04-07_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 bulkscore=0 phishscore=0 spamscore=0 impostorscore=0 lowpriorityscore=0 suspectscore=0 clxscore=1015 malwarescore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604010000 definitions=main-2604070103 On 4/7/26 11:30 AM, Taniya Das wrote: > From: Akhil P Oommen > > In A8x GPUs, the GX GDSC is moved to a separate block called GXCLKCTL > which is under the GX power domain. Due to the way the support for this > block is implemented in its driver, pm_runtime votes result in a vote on > GX/GMxC/MxC rails from the APPS RSC. This is against the Adreno > architecture which require GMU to be the sole voter of these collapsible > rails on behalf of GPU, except during the GPU/GMU recovery. > > To align with this architectural requirement and to realize the power > benefits of the IFPC feature, remove the GXPD votes during gmu resume > and suspend. And during the recovery sequence, enable/disable the GXPD > along with the 'synced_poweroff' genpd hint to force collapse this GDSC. > > Signed-off-by: Akhil P Oommen > Signed-off-by: Taniya Das > --- Can we simply make this change unconditional on the gen, so as not to maintain 2 separate code paths that try to achieve mostly the same thing? Konrad