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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b93987b9f73sm259566666b.47.2026.03.02.05.46.34 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 02 Mar 2026 05:46:36 -0800 (PST) Message-ID: Date: Mon, 2 Mar 2026 14:46:33 +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 1/2] drm/msm/dpu: fix mismatch between power and frequency To: Dmitry Baryshkov Cc: yuanjiey , robin.clark@oss.qualcomm.com, lumag@kernel.org, abhinav.kumar@linux.dev, jesszhan0024@gmail.com, sean@poorly.run, marijn.suijten@somainline.org, airlied@gmail.com, simona@ffwll.ch, krzysztof.kozlowski@linaro.org, linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org, tingwei.zhang@oss.qualcomm.com, aiqun.yu@oss.qualcomm.com, yongxing.mou@oss.qualcomm.com References: <20260109083808.1047-2-yuanjie.yang@oss.qualcomm.com> <4g6fyehdc3fejx3pzeysmghigazfei3jz2vmnvxrnqkkbtbxdb@bdlcddxlvbhl> Content-Language: en-US From: Konrad Dybcio In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-ORIG-GUID: A-JxeDBqhK3vxKf2zFpAWAzsmjX7vgxz X-Proofpoint-GUID: A-JxeDBqhK3vxKf2zFpAWAzsmjX7vgxz X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzAyMDExNCBTYWx0ZWRfXylD+sZjYY1ll Z3K708ratOf0yPt06M0hD5ox24ElctCQoKjjhUlh1EDq/qKh6jSCNk8ZDsI/p41uJnh3/U2t9wt GqEfhjB6+FCL2kvlgovIPs74/x2Kkmd65+qIDaOfT4mLIj5O6KFur/ByKIH+uGh5YhzwDi45qqW JFT7KG166B2Yk0xmnDp9FTOhloXtggo066SyectsJ6Pgkp6NnA03WNTk4Wr+wxcs0cdBTh8vzIJ GQIsh/rWeFZgiIi7Vlyrw50BcqxNqPaK7YIBymrgHW+lUKIXpiQfP71knB3H7qjINiuPCpuEW9f IpSlQZbSi5ucK/yN6u+ZQztAmKX9+dzR7cfL/tMKhja+SZ+4GQGcaxoFYIZuLoEV7QJeqskpV2a fqM3dhSmQzoybWa+p5Zy7DODAz7djZRg31IFqQprMtUxmYp6E4EMKJu6+BKkOfEvziQeiWI+HBI htHG9mUiqlRHXN3P9rw== X-Authority-Analysis: v=2.4 cv=cLntc1eN c=1 sm=1 tr=0 ts=69a594bf cx=c_pps a=HLyN3IcIa5EE8TELMZ618Q==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=ZpdpYltYx_vBUK5n70dp:22 a=EUspDBNiAAAA:8 a=pGLkceISAAAA:8 a=v90i8EJGIdyDnMh8qEMA:9 a=QEXdDO2ut3YA:10 a=bTQJ7kPSJx9SKPbeHEYW:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-02_03,2026-03-02_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 malwarescore=0 bulkscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 phishscore=0 spamscore=0 suspectscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2603020114 On 3/2/26 2:28 PM, Dmitry Baryshkov wrote: > On Mon, Mar 02, 2026 at 11:41:59AM +0100, Konrad Dybcio wrote: >> On 2/27/26 8:05 PM, Dmitry Baryshkov wrote: >>> On Fri, Feb 27, 2026 at 12:34:04PM +0100, Konrad Dybcio wrote: >>>> On 2/27/26 4:48 AM, Dmitry Baryshkov wrote: >>>>> On Thu, Feb 26, 2026 at 02:35:52PM +0100, Konrad Dybcio wrote: >>>>>> On 1/12/26 9:25 AM, yuanjiey wrote: >>>>>>> On Mon, Jan 12, 2026 at 09:38:41AM +0200, Dmitry Baryshkov wrote: >>>>>>>> On Mon, 12 Jan 2026 at 08:23, yuanjiey wrote: >>>>>>>>> >>>>>>>>> On Fri, Jan 09, 2026 at 05:22:37PM +0200, Dmitry Baryshkov wrote: >>>>>>>>>> On Fri, Jan 09, 2026 at 04:38:07PM +0800, yuanjie yang wrote: >>>>>>>>>>> From: Yuanjie Yang [...] >>> 1.0 - old MSM8974 >>> I'd rather not touch it, it had bugs and I don't have HW >> >> I have reasons to believe msm8974 v1.0 never reached store shelves. >> Let's remove this. > > Please send a patch ;-) done! > >> >>> 1.1 - MSM8x26 >>> Probably Luca can better comment on it. Should be doable, but I >>> don't see upstream devices using display on it. >> >> Because there's no iommu support for these > > I promised to put it on my todo list, but the list is very long. > >> >>> 1.2 - MSM8974 >>> I think it also had issues, no IOMMU support in upstream, etc. >>> 1.3 - APQ8084 >>> Had hw issues, no testing base, no MDSS in upstream DT >>> 1.6 - MSM8916 / MSM8939 >>> Can be done, low-hanging fruit for testing >>> 1.7 - MSM8996 >>> Supported in DPU >>> 1.8 - MSM8936 >>> No upsteram testing base >> >> 8936 is 39 with some CPUs fused off (unless you have info suggesting >> otherwise) > > Hmm, you added 8x36 to mdp5_cfg.c, stating it is 1.8. See commit > 81c4389e4835 ("drm/msm/mdp5: Add MDP5 configuration for MSM8x36.") > Author: Konrad Dybcio > > Please remove it from the mdp5_cfg to avoid confusion. v1.6 is strictly for 8916. 8936/39 both use v1.8. >>> 1.9 - MSM8994 >>> No upstream testing base, no MDSS in upstream DT, normal CURSOR planes >>> 1.10 - MSM8992 >>> Even less testing base, no MDSS in upstream DT, normal CURSOR planes >>> 1.11 - MSM8956 / 76 >>> No complete display configurations upstream >> >> +Marijn, is your computer museum still running? > > Should we open a Qualcomm Virtual Museum? Maybe someone has a drawer full of QSD8250s! > >> >>> 1.14 - MSM8937 >>> Supported in DPU >>> 1.15 - MSM8917 >>> Supported in DPU >>> 1.16 - MSM8953 >>> Supported in DPU >>> 1.17 - QCS405 >>> Zero testing base, no MDSS in upstream DT >> >> No upstream MDP5 support either. And it doesn't seem like that SoC had >> much uses that didn't end up with the thing glued shut.. > > I saw and touched devices, but that was display-less version. Only further confirming it's not worth pursuing Konrad