From nobody Thu Dec 18 14:29:07 2025 Received: from szxga06-in.huawei.com (szxga06-in.huawei.com [45.249.212.32]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C14F522D4F2 for ; Fri, 30 May 2025 10:03:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.32 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748599428; cv=none; b=bnfB86cQe4COR2YrTMTRoEbUE7GDmlnZk4F6+OINPLFeqdoF7b4A3dq6mn4gRvYRIc5dRaEH9DqTffwIoJ1manZp1K5BvAdIQF2Hnso00oxYMulm3rJNIMUrjbnYTi0Y+M0VHgam6K0NBh5vjW0iR4EVu2+delYFtx1yZ40baRg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748599428; c=relaxed/simple; bh=mDCzqgVG/YMS/4jeZL7qdvquA+VdsUNZ/seaj0/cieY=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=SrlZe+sjlOizngXxXyHoBhjLlra78A+NWGKpFPENM4BhpB30LyGaqVGCjJZsWDU9YpGQ/NqKzaTsAlAM9aEu4wDeNPE5HW9sEfBvUKx08GQrEYEe0WV/hFemHrhj108vKNCtjf7fuk9ouEDc9j/0abRGAhSq7JQv5EmucD7iPDo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=45.249.212.32 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.19.88.163]) by szxga06-in.huawei.com (SkyGuard) with ESMTP id 4b7zNs4wm4z27jJR; Fri, 30 May 2025 18:04:29 +0800 (CST) Received: from dggemv712-chm.china.huawei.com (unknown [10.1.198.32]) by mail.maildlp.com (Postfix) with ESMTPS id 5F5AD18005F; Fri, 30 May 2025 18:03:39 +0800 (CST) Received: from kwepemq100007.china.huawei.com (7.202.195.175) by dggemv712-chm.china.huawei.com (10.1.198.32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Fri, 30 May 2025 18:03:39 +0800 Received: from localhost.huawei.com (10.169.71.169) by kwepemq100007.china.huawei.com (7.202.195.175) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Fri, 30 May 2025 18:03:38 +0800 From: Yongbang Shi To: , , , , , , , CC: , , , , , , , , , Subject: [PATCH drm-dp 09/10] drm/hisilicon/hibmc: fix HPD no showing with VGA para of GRUB Date: Fri, 30 May 2025 17:54:31 +0800 Message-ID: <20250530095432.1206966-10-shiyongbang@huawei.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20250530095432.1206966-1-shiyongbang@huawei.com> References: <20250530095432.1206966-1-shiyongbang@huawei.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: quoted-printable X-ClientProxiedBy: kwepems100002.china.huawei.com (7.221.188.206) To kwepemq100007.china.huawei.com (7.202.195.175) From: Baihan Li In early OS versions=EF=BC=8C there is a bug in hibmc-drm driver previously, so some OS add a VGA parameter in GRUB(video=3DVGA-1:640x480-32@60me) to fix the bug, that will config a force VGA mode to drm driver. However, the HPD problem exists that mentioned in previous patch, so change VGA's status in force() to compatible with some older OS versions. Fixes: f9698f802e50 ("drm/hisilicon/hibmc: Restructuring the header dp_reg.= h") Signed-off-by: Baihan Li --- drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c b/drivers/gpu= /drm/hisilicon/hibmc/hibmc_drm_vdac.c index 73dd3d5fc26c..d609ccda2f2a 100644 --- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c @@ -61,6 +61,19 @@ static int hibmc_vdac_detect(struct drm_connector *conne= ctor, struct drm_modeset return connector_status_connected; } =20 +static void hibmc_vdac_force(struct drm_connector *connector) +{ + struct hibmc_drm_private *priv =3D to_hibmc_drm_private(connector->dev); + struct hibmc_dp *dp =3D &priv->dp; + + if (dp->hpd_status) { + connector->status =3D connector_status_disconnected; + return; + } + + connector->status =3D connector_status_connected; +} + static void hibmc_connector_destroy(struct drm_connector *connector) { struct hibmc_vdac *vdac =3D to_hibmc_vdac(connector); @@ -81,6 +94,7 @@ static const struct drm_connector_funcs hibmc_connector_f= uncs =3D { .reset =3D drm_atomic_helper_connector_reset, .atomic_duplicate_state =3D drm_atomic_helper_connector_duplicate_state, .atomic_destroy_state =3D drm_atomic_helper_connector_destroy_state, + .force =3D hibmc_vdac_force, }; =20 static void hibmc_encoder_mode_set(struct drm_encoder *encoder, --=20 2.33.0