From nobody Tue Apr 7 08:12:04 2026 Received: from cstnet.cn (smtp81.cstnet.cn [159.226.251.81]) (using TLSv1.2 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 431A43148D0 for ; Sat, 14 Mar 2026 16:54:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.81 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773507289; cv=none; b=KAKqPDaYuOdASsi2+hFx+n4jL9nJEzhF3oa2tS/C7bAF0Oqe9eAG1VBQvCbaGQaNfL9/mBoQ/sxVlJm6ira0vPD4AfiLAXZX/9VrljgWlMvG5B0xXQUu6Ac5ClL2Pz2qgGx8Kir5jm9XfnJBLTeimNh4Or4jCt/vHJ4r51iiCZ4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773507289; c=relaxed/simple; bh=lM/IUX2Pi4b5tMS2W2gdHqnkozqV4eYdaAGQs7K/ZDE=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=He/SDZdeA95fpn0sJhPx2hQxaHZiPavzVHbFR7WNyrDg4Wyw6iUEBZtju20BEiGlkB/Y6u4qcb/+eQs2dM/rhl8VEeYzN8kDIqJZFP1yqb6wGr7VAHRGR9xsxQu7KhcH4cr0abT7RazpLF6u/IvACsaG7qYG7oIMJTcMsvDv35o= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn; spf=pass smtp.mailfrom=iscas.ac.cn; arc=none smtp.client-ip=159.226.251.81 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iscas.ac.cn Received: from edelgard.fodlan.icenowy.me (unknown [112.94.100.43]) by APP-03 (Coremail) with SMTP id rQCowABXdt2_krVp5hKqCg--.41046S2; Sun, 15 Mar 2026 00:54:24 +0800 (CST) From: Icenowy Zheng To: Sui Jingfeng , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Icenowy Zheng Subject: [PATCH] drm/loongson: stop to set get_vblank_timestamp for 7A1000 CRTC Date: Sun, 15 Mar 2026 00:54:21 +0800 Message-ID: <20260314165421.1201790-1-zhengxingda@iscas.ac.cn> X-Mailer: git-send-email 2.52.0 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 X-CM-TRANSID: rQCowABXdt2_krVp5hKqCg--.41046S2 X-Coremail-Antispam: 1UD129KBjvJXoW7Xw1UJw1rWr48Kr43Aw15CFg_yoW8Jr4kpF srCF1IyrWDXFySywnrJF10kayruay5Jr929a9Fkw13uw45Ar18CF18AFW7uw17XF9rZ3ya qrn7tF1YkFs29aUanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUkE14x267AKxVW8JVW5JwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2AK02 1l84ACjcxK6xIIjxv20xvE14v26r4j6ryUM28EF7xvwVC0I7IYx2IY6xkF7I0E14v26r4j 6F4UM28EF7xvwVC2z280aVAFwI0_Cr0_Gr1UM28EF7xvwVC2z280aVCY1x0267AKxVW8Jr 0_Cr1UM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj 6xIIjxv20xvE14v26r1j6r18McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr 0_Gr1lF7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7MxkF7I0En4kS14v2 6r1q6r43MxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY6r1j6r4UMI8I3I0E5I8CrV AFwI0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVWUtVW8ZwCI c40Y0x0EwIxGrwCI42IY6xIIjxv20xvE14v26r1j6r1xMIIF0xvE2Ix0cI8IcVCY1x0267 AKxVWUJVW8JwCI42IY6xAIw20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Jr0_ Gr1lIxAIcVC2z280aVCY1x0267AKxVW8Jr0_Cr1UYxBIdaVFxhVjvjDU0xZFpf9x0JUd-B _UUUUU= X-CM-SenderInfo: x2kh0wp0lqwv3d6l2u1dvotugofq/ Content-Type: text/plain; charset="utf-8" As there's no known hardware capability about querying vblank on the 7A1000 display controller, setting get_vblank_timestamp will mislead the kernel about the support of DC-backed high precision vblank query. Drop this function pointer in the CRTC function table for 7A1000. This solves a kernel warning when booting Linux 7.0-rc3 on a 3A4000+7A1000 Haier Boyue G51 laptop (with injected EDID for replicating the display timing set by the firmware). Signed-off-by: Icenowy Zheng Acked-by: Thomas Zimmermann --- drivers/gpu/drm/loongson/lsdc_crtc.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/gpu/drm/loongson/lsdc_crtc.c b/drivers/gpu/drm/loongso= n/lsdc_crtc.c index 587fbe285e9ef..b3af8e0cdb15f 100644 --- a/drivers/gpu/drm/loongson/lsdc_crtc.c +++ b/drivers/gpu/drm/loongson/lsdc_crtc.c @@ -721,7 +721,6 @@ static const struct drm_crtc_funcs ls7a1000_crtc_funcs = =3D { .late_register =3D lsdc_crtc_late_register, .enable_vblank =3D lsdc_crtc_enable_vblank, .disable_vblank =3D lsdc_crtc_disable_vblank, - .get_vblank_timestamp =3D drm_crtc_vblank_helper_get_vblank_timestamp, .atomic_print_state =3D lsdc_crtc_atomic_print_state, }; =20 --=20 2.52.0