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([103.218.174.23]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-841d70b855csm1651909b3a.38.2026.05.27.01.58.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 27 May 2026 01:58:20 -0700 (PDT) From: Sudarshan Shetty To: andrzej.hajda@intel.com, neil.armstrong@linaro.org, rfoss@kernel.org Cc: Laurent.pinchart@ideasonboard.com, jonas@kwiboo.se, jernej.skrabec@gmail.com, luca.ceresoli@bootlin.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, alexander.stein@ew.tq-group.com, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Sudarshan Shetty Subject: [PATCH v4 2/2] drm: bridge: ti-sn65dsi83: Disable video burst mode for LVDS stability Date: Wed, 27 May 2026 14:27:36 +0530 Message-Id: <20260527085736.920390-3-tessolveupstream@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260527085736.920390-1-tessolveupstream@gmail.com> References: <20260527085736.920390-1-tessolveupstream@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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" The current DSI configuration enables MIPI_DSI_MODE_VIDEO_BURST. while burst mode is supported by the hardware, its use depends on continuous clock behavior from the DSI host. In practice, burst mode may introduce instability depending on the host controller implementation, as the DSI link may transition to low-power state between bursts. Testing showed improved display stability when using non-burst mode on affected panels. Remove MIPI_DSI_MODE_VIDEO_BURST and use non-burst video mode. Tested-by: Luca Ceresoli Tested-by: Alexander Stein Signed-off-by: Sudarshan Shetty --- drivers/gpu/drm/bridge/ti-sn65dsi83.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi83.c b/drivers/gpu/drm/bridge/ti-sn65dsi83.c index c03ff1ea9df8..6b5a6019c30d 100644 --- a/drivers/gpu/drm/bridge/ti-sn65dsi83.c +++ b/drivers/gpu/drm/bridge/ti-sn65dsi83.c @@ -976,8 +976,8 @@ static int sn65dsi83_host_attach(struct sn65dsi83 *ctx) dsi->lanes = dsi_lanes; dsi->format = MIPI_DSI_FMT_RGB888; - dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | - MIPI_DSI_MODE_VIDEO_NO_HSA | MIPI_DSI_MODE_NO_EOT_PACKET; + dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_NO_HSA | + MIPI_DSI_MODE_NO_EOT_PACKET; ret = devm_mipi_dsi_attach(dev, dsi); if (ret < 0) { -- 2.34.1