From nobody Mon Apr 6 10:45:16 2026 Received: from cstnet.cn (smtp21.cstnet.cn [159.226.251.21]) (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 48BB632C94B for ; Sat, 21 Mar 2026 09:28:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.21 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774085301; cv=none; b=D93nc1fBFiDhCIECJD5YxMd1wNtzC17tVruknE4EB6Jo4DsX3CubF8bpwitqZSOBGA6wwYe83SHJF39ZrlMsvW8REd4wI3ea9V7u/Ic37Lw/YpHdlWlhHW9aV4XsbbKPrJugVGGYtuFNaHWv+mYq5UA2yLQkFMHaeqrQ7t1MxJQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774085301; c=relaxed/simple; bh=B59IeXQXQ3Zy7VJXAlO5rHuWsCCx6ufrfJs2XQv4VHk=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=F4A1ChfMfUI7O3WgWsf29C9h/fIQeVR9iqOpm3F+xxDQjjCr5rMoSXTUhgy2ZqXMY+sJ4wSJFOc7tMiNuVAxPBX5hpvYI3u2fORM9pr8AQMBbKLwKQ49LigVhfF/wKg28keayQcwqNUKQzJzzJE0OGVsDvap96dziXBcIujVKtc= 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=159.226.251.21 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 [112.94.102.202]) by APP-01 (Coremail) with SMTP id qwCowAB3IW2oZL5pbtSyCg--.10772S2; Sat, 21 Mar 2026 17:28:09 +0800 (CST) From: Icenowy Zheng To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Jianmin Lv , Qianhai Wu , Huacai Chen , Mingcong Bai , Xi Ruoyao Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Icenowy Zheng Subject: [PATCH v2] drm/loongson: stop to set get_vblank_timestamp for LS7A1000 CRTC Date: Sat, 21 Mar 2026 17:28:04 +0800 Message-ID: <20260321092804.3519447-1-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: qwCowAB3IW2oZL5pbtSyCg--.10772S2 X-Coremail-Antispam: 1UD129KBjvJXoW7ZFy5JF48AF4DWr15Kr1kAFb_yoW8Gr1fpF srCF1xtrWkXFWSywnxJF109a1ruay5Jr929ay2kw13uw45Cr1UCF18AF47uw17XF9rX3yI grn7KF4YkF4I93JanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUU9a14x267AKxVW8JVW5JwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2AK02 1l84ACjcxK6xIIjxv20xvE14v26ryj6F1UM28EF7xvwVC0I7IYx2IY6xkF7I0E14v26r4U JVWxJr1l84ACjcxK6I8E87Iv67AKxVWxJr0_GcWl84ACjcxK6I8E87Iv6xkF7I0E14v26r xl6s0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj 6xIIjxv20xvE14v26r106r15McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr 0_Gr1lF7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7M4IIrI8v6xkF7I0E 8cxan2IY04v7MxkF7I0En4kS14v26r1q6r43MxAIw28IcxkI7VAKI48JMxC20s026xCaFV Cjc4AY6r1j6r4UMI8I3I0E5I8CrVAFwI0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWl x4CE17CEb7AF67AKxVWUtVW8ZwCIc40Y0x0EwIxGrwCI42IY6xIIjxv20xvE14v26r1I6r 4UMIIF0xvE2Ix0cI8IcVCY1x0267AKxVW8Jr0_Cr1UMIIF0xvE42xK8VAvwI8IcIk0rVWU JVWUCwCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6xkF7I0E14v26r4UJVWxJr UvcSsGvfC2KfnxnUUI43ZEXa7VU13ku3UUUUU== X-CM-SenderInfo: x2kh0wp0lqwv3d6l2u1dvotugofq/ Content-Type: text/plain; charset="utf-8" As there's no known hardware capability about querying vblank on the LS7A1000 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 LS7A1000. This solves a kernel warning when booting Linux 7.0-rc3 on a Loongson-3A4000+LS7A1000 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 --- Changes in v2: - Re-formatted Loongson product model numbers per request from Huacai. 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