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Wed, 02 Aug 2023 01:52:31 -0700 (PDT) Received: from arrakeen.starnux.net ([2a01:e0a:982:cbb0:8261:5fff:fe11:bdda]) by smtp.gmail.com with ESMTPSA id x4-20020a1c7c04000000b003fa973e6612sm1094035wmc.44.2023.08.02.01.52.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Aug 2023 01:52:31 -0700 (PDT) From: Neil Armstrong Date: Wed, 02 Aug 2023 10:52:22 +0200 Subject: [PATCH] Revert "drm/bridge: lt9611: Do not generate HFP/HBP/HSA and EOT packet" MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20230802-revert-do-not-generate-hfp-hbp-hsa-eot-packet-v1-1-f8a20084e15a@linaro.org> X-B4-Tracking: v=1; b=H4sIAEUZymQC/x2NwQrDIBBEfyXsuQtqSgn9ldKDJmOUgsoqJRDy7 116mMNjHjMndUhGp+d0kuCbe65Fwd4mWpMvOzhvyuSMm81iHKsEGbxVLnXwjgLxA5xi4xQ03TO 0aH79YPAjmrsLNvjFzqSbTRDz8f97va/rBwbXaYZ/AAAA To: Andrzej Hajda , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , David Airlie , Daniel Vetter , Marek Vasut Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Jagan Teki , Dmitry Baryshkov , Abhinav Kumar , Amit Pundir , Neil Armstrong X-Mailer: b4 0.12.3 X-Developer-Signature: v=1; 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a=openpgp; fpr=89EC3D058446217450F22848169AB7B1A4CFF8AE Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This reverts commit [1] to fix display regression on the Dragonboard 845c (SDM845) devboard. There's a mismatch on the real action of the following flags: - MIPI_DSI_MODE_VIDEO_NO_HSA - MIPI_DSI_MODE_VIDEO_NO_HFP - MIPI_DSI_MODE_VIDEO_NO_HBP which leads to a non-working display on qcom platforms. [1] 8ddce13ae696 ("drm/bridge: lt9611: Do not generate HFP/HBP/HSA and EOT = packet") Cc: Marek Vasut Cc: Robert Foss Cc: Jagan Teki Cc: Dmitry Baryshkov Cc: Abhinav Kumar Fixes: 8ddce13ae69 ("drm/bridge: lt9611: Do not generate HFP/HBP/HSA and EO= T packet") Reported-by: Amit Pundir Link: https://lore.kernel.org/r/CAMi1Hd0TD=3D2z_=3DbcDrht3H_wiLvAFcv8Z-U_r_= KUOoeMc6UMjw@mail.gmail.com/ Signed-off-by: Neil Armstrong Acked-by: Dmitry Baryshkov Acked-by: Dmitry Baryshkov #fix db845c Tested-by: Amit Pundir --- drivers/gpu/drm/bridge/lontium-lt9611.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/gpu/drm/bridge/lontium-lt9611.c b/drivers/gpu/drm/brid= ge/lontium-lt9611.c index 5163e5224aad..9663601ce098 100644 --- a/drivers/gpu/drm/bridge/lontium-lt9611.c +++ b/drivers/gpu/drm/bridge/lontium-lt9611.c @@ -774,9 +774,7 @@ static struct mipi_dsi_device *lt9611_attach_dsi(struct= lt9611 *lt9611, dsi->lanes =3D 4; dsi->format =3D MIPI_DSI_FMT_RGB888; dsi->mode_flags =3D MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE | - MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_VIDEO_NO_HSA | - MIPI_DSI_MODE_VIDEO_NO_HFP | MIPI_DSI_MODE_VIDEO_NO_HBP | - MIPI_DSI_MODE_NO_EOT_PACKET; + MIPI_DSI_MODE_VIDEO_HSE; =20 ret =3D devm_mipi_dsi_attach(dev, dsi); if (ret < 0) { --- base-commit: f590814603bf2dd8620584b7d59ae94d7c186c69 change-id: 20230802-revert-do-not-generate-hfp-hbp-hsa-eot-packet-6f042b1ba= 813 Best regards, --=20 Neil Armstrong