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[2a01:cb08:52d:7400:bbd7:ca83:de4a:f625]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48fc8d624fbsm27177615e9.10.2026.05.12.10.03.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 May 2026 10:03:04 -0700 (PDT) From: =?UTF-8?q?J=C3=A9r=C3=B4me=20de=20Bretagne?= To: mitltlatltl@gmail.com Cc: andersson@kernel.org, linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, mturquette@baylibre.com, sboyd@kernel.org, johannes.goede@oss.qualcomm.com Subject: Re: [PATCH] clk: qcom: dispcc-sc8280xp: Don't park mdp_clk_src at registration time Date: Tue, 12 May 2026 19:02:51 +0200 Message-ID: <20260512170257.8920-1-jerome.debretagne@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260303150152.90685-1-mitltlatltl@gmail.com> References: <20260303150152.90685-1-mitltlatltl@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit > Parking disp{0,1}_cc_mdss_mdp_clk_src clk broke simplefb on HUAWEI > Gaokun3, the image will stuck at grey for seconds until msm takes > over framebuffer. Use clk_rcg2_shared_no_init_park_ops to skip it. > > Signed-off-by: Pengyu Luo This patch allows to keep the built-in display enabled on the Microsoft Surface Pro 9 5G (Arcata) using efifb and software rendering. This was achieved by passing the "module_blacklist=msm" option. It is really useful as the built-in display is not yet working thus not described in the arcata devicetree so far. Thank you Pengyu. Tested-by: Jérôme de Bretagne Without this patch, the initial EFI framebuffer gets disabled a few seconds after the initial boot messages. This has been a regression as it used to work when doing the initial bringup with Linux 6.9. As mentioned in the similar patchset for the x1e80100 dispcc driver https://lore.kernel.org/all/67a51928-1c16-48a6-ac65-f67c36297e5e@oss.qualcomm.com/ according to Hans, this should be a fix for the following commit: Fixes: 01a0a6cc8cfd ("clk: qcom: Park shared RCGs upon registration") Regards, Jérôme