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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-64b9ef904bcsm9089567a12.22.2025.12.22.01.19.34 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 22 Dec 2025 01:19:36 -0800 (PST) Message-ID: Date: Mon, 22 Dec 2025 10:19:33 +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 RFC 3/6] drm/msm: mdss: Add Milos support To: Dmitry Baryshkov , Luca Weiss Cc: Bjorn Andersson , Konrad Dybcio , Rob Clark , Dmitry Baryshkov , Abhinav Kumar , Jessica Zhang , Sean Paul , Marijn Suijten , David Airlie , Simona Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , ~postmarketos/upstreaming@lists.sr.ht, phone-devel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, devicetree@vger.kernel.org References: <20251219-milos-mdss-v1-0-4537a916bdf9@fairphone.com> <20251219-milos-mdss-v1-3-4537a916bdf9@fairphone.com> <475izg5bi56oefqtqkvqeyspx2por66zrw4tgqbb3f2ziaghyt@tccm73sl2u2e> <2f3c7bc8-8c7b-4c47-95de-7a8ac6dc3c57@oss.qualcomm.com> <9965e114-43c4-4470-992c-1051ff1b7f36@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <9965e114-43c4-4470-992c-1051ff1b7f36@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMjIyMDA4MyBTYWx0ZWRfX4KWIGestmeoA u6zrXsmKbyybjmJKY0jKv7r3o5G5gbFqQ5m9VeLJjNm9oZ5zl4hph0c3kTGcuv84OIqIUHzOcJT GKXy7aaL3Oa5Pv4VbL+vxFrCBdWooLxzx2X67AA/7BmCRfJkL+Qzdg47KCJ6HZYqIwI/WjJmpAn jg8s57jUlhjBv+fn5aWmZEH84vvnbLCCLbDLjQvRerufDYGlHqx2sIHZzU8G+/pI0QIcnMNG/w+ dAsKOrMY1UGHXYUx5vYGVvkzhXIHXvsPd8thY/wtmA6dT0JqnwSAKfMR8xQ2CWv1IWuTgbPf2ab +jTodCCnyxgGpGa1pdT2utM/G6338YqQX59cD+Wlu/CPkQYrL8E4lgpPq3eXJheB312mkocQO0B wUiAVYjzXxWyMJU35+hNtVWJhgk4aL8lJTj+bqO5bruHv562In9ODNBwJ7mVX7pf/Rm5otMdCNS 1tH+AMUTpLYd/7wJnUg== X-Proofpoint-GUID: 3wvY_7bH3V-KRwkemWyAx10wkYgu7c7U X-Proofpoint-ORIG-GUID: 3wvY_7bH3V-KRwkemWyAx10wkYgu7c7U X-Authority-Analysis: v=2.4 cv=KYbfcAYD c=1 sm=1 tr=0 ts=69490d2a cx=c_pps a=WeENfcodrlLV9YRTxbY/uA==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=wP3pNCr1ah4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=6H0WHjuAAAAA:8 a=EUspDBNiAAAA:8 a=lWcTiWiVgQmTcaRhBa8A:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=kacYvNCVWA4VmyqE58fU:22 a=Soq9LBFxuPC4vsCAQt-j:22 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=2025-12-21_05,2025-12-19_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 suspectscore=0 phishscore=0 malwarescore=0 spamscore=0 priorityscore=1501 clxscore=1015 bulkscore=0 lowpriorityscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2512120000 definitions=main-2512220083 On 12/22/25 10:12 AM, Dmitry Baryshkov wrote: > On 22/12/2025 11:09, Konrad Dybcio wrote: >> On 12/20/25 5:52 PM, Dmitry Baryshkov wrote: >>> On Fri, Dec 19, 2025 at 05:41:09PM +0100, Luca Weiss wrote: >>>> Add support for MDSS on Milos. >>>> >>>> Signed-off-by: Luca Weiss >>>> --- >>>>   drivers/gpu/drm/msm/msm_mdss.c | 5 +++++ >>>>   1 file changed, 5 insertions(+) >>>> >>> >>> Reviewed-by: Dmitry Baryshkov >>> >>> Though 14000 seems lower than the value for all other platforms. >> >> IIUC it's essentially "nonzero" or "first-level-above-just-nonzero" >> >> The downstream DT also defines a 140_000 and a 310_000 point.. though >> the middle one is never(?) used and the latter one is only used during >> UEFI handoff and upon the first commit after (runtime) resume > > If I remember correctly, those are also used for programming the LUTs or other big tables into the hardware. FWIW this is an interconnect path for non-DMA accesses so that only makes sense - huge writes could overwhelm the bus Konrad