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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-65fabd36219sm3161313a12.3.2026.03.02.04.37.55 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 02 Mar 2026 04:37:57 -0800 (PST) Message-ID: Date: Mon, 2 Mar 2026 13:37:54 +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 1/7] drm/msm/dpu: drop VBIF_NRT handling To: Dmitry Baryshkov , Rob Clark , Dmitry Baryshkov , Abhinav Kumar , Jessica Zhang , Sean Paul , Marijn Suijten , David Airlie , Simona Vetter Cc: linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org References: <20260227-drop-vbif-nrt-v1-0-2b97d0438182@oss.qualcomm.com> <20260227-drop-vbif-nrt-v1-1-2b97d0438182@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20260227-drop-vbif-nrt-v1-1-2b97d0438182@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: a7Vkx0d-0JJ1XkmUlJ7-TKO3vcwEJQhC X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzAyMDEwNiBTYWx0ZWRfX7KftQ21rtbQo ZXp2IDWEPbU+b7Mp+YIBEukFqGNtTIwgc7WZejPCp6WTCn5zraLZoLWtthLuNSLjK8JbZ3TpZrD FGdx3FicwMRpxFNbZO+t6BjbNlYxTyMCyzkNfGaYAVj1K0WTfrtbvGp7I0dPdelzDteqbgIgLhD IWkJyXg1LerEseaFz5614ooRSpabZr2xnJVh96xnwtlHNnzoihmPj1N0qONzBita+u46oEnhSpr 7Mn1nQPeDscEoV/Q+XU4EDncmZo684G+vdDYR5Fapo8aUlb7Vcsn139a6eCtkMLXNqB7FVU+vLe 1+P9Es2AR/Q5R0RoFuCggo1EBRs8v3uv3A+pUBB0oRm3rtfXfXMBE7inCWxgQ5WlvN+pORoIGyj o0jxXoFDpuO13vtdw6/Le1Z2ayEPpCv8XGvyTgeTZ/GtNdnak7sifpEP1bDNtICySkrngBBnKFY E7tPctPYJnmGvKbbvkQ== X-Proofpoint-ORIG-GUID: a7Vkx0d-0JJ1XkmUlJ7-TKO3vcwEJQhC X-Authority-Analysis: v=2.4 cv=I5Vohdgg c=1 sm=1 tr=0 ts=69a584a7 cx=c_pps a=qKBjSQ1v91RyAK45QCPf5w==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_K5XuSEh1TEqbUxoQ0s3:22 a=EUspDBNiAAAA:8 a=5umUYrs0ihikrlwyJ8oA:9 a=QEXdDO2ut3YA:10 a=NFOGd7dJGGMPyQGDc5-O: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_03,2026-02-27_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 adultscore=0 priorityscore=1501 lowpriorityscore=0 clxscore=1015 phishscore=0 impostorscore=0 bulkscore=0 spamscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2603020106 On 2/27/26 7:36 PM, Dmitry Baryshkov wrote: > The second VBIF instance, VBIF_NRT, is only used for the separate inline > rotator block. It is unsupported by the DPU driver and will require a > separate driver (or separate instance of the DPU device). > > The only possible user of VBIF_NRT is writeback on MSM8996, however > writeback on that platform is currently unsupported and it's not worth > keeping extra complexity for the sake of that single legacy platform. > > None of the hardware catalogs entries actually declare VBIF_NRT, so it > is left in its default state. > > Stop pretending that DPU driver cares about VBIF_NRT and drop it. > > Reported-by: Konrad Dybcio > Signed-off-by: Dmitry Baryshkov > --- Reviewed-by: Konrad Dybcio Konrad