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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b8795a18c3fsm1061152466b.58.2026.01.19.02.56.13 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 19 Jan 2026 02:56:15 -0800 (PST) Message-ID: <999ad755-91fd-4ba8-a3f8-1cb1673e714e@oss.qualcomm.com> Date: Mon, 19 Jan 2026 11:56:12 +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 v3 2/4] drm/msm/dpu: offset HBB values written to DPU by -13 To: Dmitry Baryshkov , Rob Clark , Dmitry Baryshkov , Abhinav Kumar , Jessica Zhang , Sean Paul , Marijn Suijten , David Airlie , Simona Vetter , Konrad Dybcio , Vinod Koul , Stephan Gerhold Cc: linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org, Val Packett References: <20260119-msm-ubwc-fixes-v3-0-34aaa672c829@oss.qualcomm.com> <20260119-msm-ubwc-fixes-v3-2-34aaa672c829@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20260119-msm-ubwc-fixes-v3-2-34aaa672c829@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMTE5MDA5MCBTYWx0ZWRfXx8NHj47vGLwd IyZyHuBjt/fMVY16MHOh26613qw2IGkzBggRgGqwCe40PkUiPIaCglVHkKiWYkrZL4fxXPSHDpb b+nEB1z1Vyob/2nxFEs5vz/aMcQsf8KodIUbkQQswQ0o46FX6D9EJxRYw8ERz+5f+bT98p9DZxD SsExnJ1Jh3SPTIYyEemypquwR6EmeEmD4Op1JRRroI63wWOpYHO0B/ARCYL8LjELAlLkuQpLqap Ixo4c4+EafeEMlsQrHjN9Zj7GMTGT2I16DHf/niOjp7fN4ImBYhmXLVQBN1C+hUXl2fVyhfyNLR t5F2tUAirZlM60C0AWmg4eI4wpXuwP12NO1dKakthOMWyhJ4msjNV/niAWtOHB3goao+8nkO8Pm qUPqueJ+PW8ZptWOocPPyU1Enge8GBOgNwQjEW1vhoBc1QZNqxDifOK8ZWb39UyJwxYf2XTQbyZ 6YCWWpgX9Y++kOKup0g== X-Authority-Analysis: v=2.4 cv=NY3rFmD4 c=1 sm=1 tr=0 ts=696e0dd1 cx=c_pps a=qKBjSQ1v91RyAK45QCPf5w==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=vUbySO9Y5rIA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=EUspDBNiAAAA:8 a=FnLLt5dnLMIZ3HHg8ZoA:9 a=QEXdDO2ut3YA:10 a=NFOGd7dJGGMPyQGDc5-O:22 X-Proofpoint-ORIG-GUID: r4avG0MooJ_FCaJIUcIY04QC6B18trdH X-Proofpoint-GUID: r4avG0MooJ_FCaJIUcIY04QC6B18trdH 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=2026-01-19_02,2026-01-19_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 impostorscore=0 suspectscore=0 lowpriorityscore=0 adultscore=0 phishscore=0 bulkscore=0 clxscore=1015 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000 definitions=main-2601190090 On 1/19/26 9:17 AM, Dmitry Baryshkov wrote: > As in all other places, the Highest Bank Bit value should be programmed > into the hardware with the offset of -13. Correct the value written > into the register to prevent unpredictable results. > > Fixes: 227d4ce0b09e ("drm/msm: Offset MDSS HBB value by 13") > Tested-by: Val Packett # x1e80100-dell-latitude-7455 > Signed-off-by: Dmitry Baryshkov > --- Reviewed-by: Konrad Dybcio Konrad