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([43.134.26.72]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-b678df66ab0sm11465258a12.35.2025.10.14.02.49.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Oct 2025 02:49:42 -0700 (PDT) From: Junjie Cao To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Dmitry Baryshkov , Junjie Cao , Jonathan Marek , Jun Nie Subject: [PATCH] drm/mipi-dsi: Add dsc_slice_per_pkt field to mipi_dsi_device Date: Tue, 14 Oct 2025 17:49:34 +0800 Message-ID: <20251014094934.322834-1-caojunjie650@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Some DSI panels require multiple DSC slices to be transmitted within a single DSC packet. The DSI host will only correctly program its registers and avoid display corruption if the dsc_slice_per_pkt parameter is provided. Since dsc_slice_per_pkt is not part of the VESA DSC standard, it should not be added to struct drm_dsc_config. Instead, introduce a new field in struct mipi_dsi_device so that panel drivers can specify the required number of slices per packet, and DSI host drivers can retrieve it accordingly. Originally, this change was part of a single patch that also included the DSI host modification. This patch splits out the mipi_dsi_device changes. The corresponding DSI host patch for Qualcomm MSM, along with a panel driver that makes use of this field, will be submitted separately. Co-developed-by: Jonathan Marek Signed-off-by: Jonathan Marek Signed-off-by: Jun Nie Signed-off-by: Junjie Cao --- include/drm/drm_mipi_dsi.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h index 3aba7b380..a6357e8c2 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -180,6 +180,7 @@ struct mipi_dsi_device_info { * be set to the real limits of the hardware, zero is only accepted for * legacy drivers * @dsc: panel/bridge DSC pps payload to be sent + * @dsc_slice_per_pkt: number of DSC slices to be sent in a single packet */ struct mipi_dsi_device { struct mipi_dsi_host *host; @@ -194,6 +195,7 @@ struct mipi_dsi_device { unsigned long hs_rate; unsigned long lp_rate; struct drm_dsc_config *dsc; + unsigned int dsc_slice_per_pkt; }; =20 /** --=20 2.51.0