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[2001:14ba:a073:af00:264b:feff:fe8b:be8a]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-5a13d086079sm434104e87.69.2026.03.06.08.50.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Mar 2026 08:50:34 -0800 (PST) Date: Fri, 6 Mar 2026 18:50:32 +0200 From: Dmitry Baryshkov To: Pengyu Luo Cc: Rob Clark , Dmitry Baryshkov , Abhinav Kumar , Jessica Zhang , Sean Paul , Marijn Suijten , David Airlie , Simona Vetter , linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] drm/msm/dsi: fix pclk rate calculation for bonded dsi Message-ID: <6k4wgdu7x5z4b4erlgteljb4742brknbwnewoobwhv2qhqawde@wpkhreke3gsr> References: <20260306163255.215456-1-mitltlatltl@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260306163255.215456-1-mitltlatltl@gmail.com> X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzA2MDE1OSBTYWx0ZWRfX+KT9yUfJdVsL hbNQWyXFxMfxLT1Z1ya628Wk1t3o9nNDvPA+m2S9L2plBRwgzVYk/5DqzVXsKMPMWytkBDE/cf3 oUqDJaHvWvOB8bwjZiuGOupj0HY5HLa5yByBMq7af5CtxTMidwteWUC8xCQZgeVNrw/jQXuZFkH 0Zbe6ptHQJcmdBxY5n6rhbaKk6mEbRNiGZD7rS7rT1kCEGucqDJic80HpeEhvHRhX4lAVqbUWAI u7roozdl1mWccks5YX0NfeiyjTQyFT8FHRXTsQiqvzYum2XbEyG5mqQHxyJvPgSVmdOeBVKU0uJ ic/0wnwkdp8V2smfmT+0cqOAYEKBzczPIdXc7pEnxcpAEaxv23Zn0x+woBuDNQOt5qY9I19Ajun GLdz01js20NaNPuvHI+iSDfvsoY2JUUGsm53vT1rAVKPdl/ILfRZ7L6UHWM7urYYmeclidYDujP ZlDQw2PxHt6TNWwl5AQ== X-Proofpoint-ORIG-GUID: T9Gpo6XMRD6ilhRujqaURXHAT4ksLOls X-Proofpoint-GUID: T9Gpo6XMRD6ilhRujqaURXHAT4ksLOls X-Authority-Analysis: v=2.4 cv=T8uBjvKQ c=1 sm=1 tr=0 ts=69ab05dd cx=c_pps a=qKBjSQ1v91RyAK45QCPf5w==:117 a=xqWC_Br6kY4A:10 a=kj9zAlcOel0A:10 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=Um2Pa8k9VHT-vaBCBUpS:22 a=pGLkceISAAAA:8 a=EUspDBNiAAAA:8 a=X81lAphP1gkamZjTqCkA:9 a=CjuIK1q_8ugA:10 a=NFOGd7dJGGMPyQGDc5-O:22 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=2026-03-06_05,2026-03-06_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 phishscore=0 lowpriorityscore=0 adultscore=0 spamscore=0 impostorscore=0 priorityscore=1501 malwarescore=0 suspectscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2603060159 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On Sat, Mar 07, 2026 at 12:32:38AM +0800, Pengyu Luo wrote: > Recently, we round up new_hdisplay once at most, for bonded dsi, we > may need twice, since they are independent links, we should round up > each half separately. This also aligns with the hdisplay we program > later in dsi_timing_setup() > > Example: > full_hdisplay = 1904, dsc_bpp = 8, bpc = 8 > new_full_hdisplay = DIV_ROUND_UP(1904 * 8, 8 * 3) = 635 > > if we use half display > new_half_hdisplay = DIV_ROUND_UP(952 * 8, 8 * 3) = 318 > new_full_display = 636 > > Fixes: 7c9e4a554d4a ("drm/msm/dsi: Reduce pclk rate for compression") > Signed-off-by: Pengyu Luo > --- > drivers/gpu/drm/msm/dsi/dsi_host.c | 29 +++++++++++++++++++++++------ > 1 file changed, 23 insertions(+), 6 deletions(-) > Reviewed-by: Dmitry Baryshkov -- With best wishes Dmitry