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[2001:14ba:a0db:1f00::8a5]) by smtp.gmail.com with ESMTPSA id j8-20020a2eb708000000b002b9e65912cesm1842077ljo.140.2023.08.02.06.38.18 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 02 Aug 2023 06:38:18 -0700 (PDT) Message-ID: <5cf0e3fa-f66d-06c4-cfda-c48efd8c6508@linaro.org> Date: Wed, 2 Aug 2023 16:38:17 +0300 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.13.0 Subject: Re: [PATCH] Revert "drm/bridge: lt9611: Do not generate HFP/HBP/HSA and EOT packet" Content-Language: en-GB To: Neil Armstrong , 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 , Abhinav Kumar , Amit Pundir References: <20230802-revert-do-not-generate-hfp-hbp-hsa-eot-packet-v1-1-f8a20084e15a@linaro.org> From: Dmitry Baryshkov In-Reply-To: <20230802-revert-do-not-generate-hfp-hbp-hsa-eot-packet-v1-1-f8a20084e15a@linaro.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 02/08/2023 11:52, Neil Armstrong wrote: > 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 EOT packet") > Reported-by: Amit Pundir > Link: https://lore.kernel.org/r/CAMi1Hd0TD=2z_=bcDrht3H_wiLvAFcv8Z-U_r_KUOoeMc6UMjw@mail.gmail.com/ > Signed-off-by: Neil Armstrong > --- > drivers/gpu/drm/bridge/lontium-lt9611.c | 4 +--- > 1 file changed, 1 insertion(+), 3 deletions(-) > Acked-by: Dmitry Baryshkov #fix db845c The boards broken by [1] are used in production by different parties since 5.10, breaking them doesn't seem more acceptable than breaking the new out-of-tree iMX8m hardware. -- With best wishes Dmitry