From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f178.google.com (mail-pf1-f178.google.com [209.85.210.178]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 715CE374A02 for ; Thu, 30 Jul 2026 20:11:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.178 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785442317; cv=none; b=GlJeiTCujt3epF4cYU7V6WqCGaRJ5z37jFpcmLoKrJYNLHtlUCoF5TCQ8+cRc41OaecwrscD3pFyOnguKgtw+oho7l0Myx2o+QSZIwpCu33mQlLIigif9xC0VZLVbgThs0gz35M+MZuWjY86R1W3m2I7u6tC7CmghmlIll+tyKw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785442317; c=relaxed/simple; bh=bgehGYxVvOhqrzJ9g+V/DTye3Nic7PErqY7Gl161rk4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=oqicIRpt3KeOGtUMPTevl15AfJpGkLFdNY8UJcqv9TlLOTir2P3o55x/PQX+9TTs4QlyVY/dZlVTH2TCox7miHpUNSUk++ZB28/DSmR895c+e9gzANpYP1Ibcs07w2XCSz8kMS5ckC5wMUhx2LECS4A6eDZGt+zHkaJJNPy17p4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=SVVO0A9A; arc=none smtp.client-ip=209.85.210.178 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="SVVO0A9A" Received: by mail-pf1-f178.google.com with SMTP id d2e1a72fcca58-84e27035206so363875b3a.3 for ; Thu, 30 Jul 2026 13:11:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1785442304; x=1786047104; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:reply-to:references :in-reply-to:message-id:date:subject:cc:to:from:from:to:cc:subject :date:message-id:reply-to:content-type; bh=QRL/mQO23aZLDOYAwAiZdksOJj7+W5EBU224dpv2hko=; b=SVVO0A9AitLveUl+OUT7/8qpSi1jp0u6t2irF12YEd3TKItCnvbsGEuvV0TW7Wr4YF l1plK9a2rxxOU2kuLG1iWWczXAmqnGtUTSTvPgKOPXg+8Kqupdke7+5C/JRgXRvynKXu JtRLvCmVg1oV03+DU42qTZKFYW/CNYigEOL8p6WAZavale2umWQ2QZA2/EYwdOIghPrK emR/ZoVt+IvBMMTxBpUFpzApaRBYJwaGr34x4nkWv5zsVmOoA22Gxz7etij0yZsMV2hP DCEZw4gbZQ43q7v3vAjMHTtCW9ix5nnnkKVl7o0KB9bPm3SBRXui9yQ/3NvPL1+VgHk8 dMUA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1785442304; x=1786047104; h=content-transfer-encoding:mime-version:reply-to:references :in-reply-to:message-id:date:subject:cc:to:from:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=QRL/mQO23aZLDOYAwAiZdksOJj7+W5EBU224dpv2hko=; b=AU7z9Ta3X6KgjsSnDxMd8zN5bEnzGbZezqsLk+K635+D6aaOkxwVq2W9/ypCnEPLWf tWDrA96er/kw/+0okwUN88JByugtzrh0EsQXuNyYAbT+P731HsUtGsI1P8gN8VBiqCJO H2kXGemcFPFjRUccr8O3g8bTOMXcAAEPyYrykImw164lt6nVMetcFWWzKTdyAMC9xPH2 dSDMmlQO27bZOlEb7pc9ME7ayRo04Hdxjy+lo76a6326Zh9WGDi1DB8mXmsV48hghvZz YvoXXnOsRYP/jmfurP15sqtANIgZ95mzJZmLvxxtg1c0Jf5HxWQD7ct72UdotWFMQtMC lYYQ== X-Forwarded-Encrypted: i=1; AHgh+RpVmNs3a/XOgFTUJmRlgjT7dBFhDKC/49oMbQ4rpYURMuaHAI/gtU1qqNtEDemuNpS8NuqdH8NY7N329Ds=@vger.kernel.org X-Gm-Message-State: AOJu0Ywy1UjHYXzqR4dIbN9u7oBq9w+ahNkg5N2Owofa50ZU47T58ifv U/6gNHVYmqBChvaRiQpEIqvJ8HIT/xvKESZRiprhoyUisXMccrgvZf6r X-Gm-Gg: AR+sD128UetLcWXW2Z+vU5ftFXdeTmo/dywVMHmeXslZ9gPRLe237xSXOSD4eHzPJgE ZIdwiRJimNmazUxPKXr9qmoIwQ4X6TnFDbDUwEa/k+4fYpUbLM4eIt5kTSBjAU0OuL3/q6uMx50 Jl90jkLZ1LUZWBUeqQXOBOFplybcSbyPzEyLiyKnpiSB5NnpT8JwbYNlygd1qDEfDsQCB+GAmDf Pm7Y0VKD88xcbkqJtjWvh/54rljqmClt2DkVIABcmg0QAKwXTEQVhGHn/nwZqypUQe9rqJgwSJU hgZPY6VqyRfh3RDckYF8V0QyJ3CTZp+ZQNht1ImNYG05htMy5ucBPdWCz1TXDrpm95yt3Po5cuR wQJL/6l8eQt8RJoHenuZuPzDrcTvuyOlMVhhgf8N9xBn9+/Bs+yQ1I+tM+q5mbYOMnOpL/cXOre Goj73WveX14XnqsJwzbK3163NY35JGdhxkeWYh7SeO1h0XqUTQLQxkXtYYsKRx4RDZP+Yz882Ji EDOF3+KlrlxeC+am2feAD/C1/xJzbRO9rZRyqim8zU= X-Received: by 2002:a05:6a00:c82:b0:845:3fea:96c with SMTP id d2e1a72fcca58-84ebc22e874mr3531492b3a.21.1785442303585; Thu, 30 Jul 2026 13:11:43 -0700 (PDT) Received: from localhost.localdomain (c-174-165-208-10.hsd1.wa.comcast.net. [174.165.208.10]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-84ea0055325sm3689108b3a.15.2026.07.30.13.11.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 30 Jul 2026 13:11:42 -0700 (PDT) From: Michael Kelley X-Google-Original-From: Michael Kelley To: kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, longli@microsoft.com, tglx@kernel.org, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, daniel.lezcano@kernel.org, ssengar@linux.microsoft.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, James.Bottomley@HansenPartnership.com, martin.petersen@oracle.com, sgarzare@redhat.com, horms@kernel.org Cc: x86@kernel.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, netdev@vger.kernel.org, linux-scsi@vger.kernel.org, virtualization@lists.linux.dev Subject: [RESEND PATCH 4/6] drm_hyperv: Remove support for synth video protocol of old Hyper-V hosts Date: Thu, 30 Jul 2026 13:11:21 -0700 Message-Id: <20260730201123.1767-5-mhklinux@outlook.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20260730201123.1767-1-mhklinux@outlook.com> References: <20260730201123.1767-1-mhklinux@outlook.com> Reply-To: mhklinux@outlook.com Precedence: bulk X-Mailing-List: linux-hyperv@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit With the overall removal of Linux support for running on Hyper-V hosts earlier than WS2016 and Windows 10, it's no longer necessary to support older synthetic video protocols. Remove the support. Signed-off-by: Michael Kelley --- drivers/gpu/drm/hyperv/hyperv_drm_proto.c | 33 +++++++---------------- 1 file changed, 10 insertions(+), 23 deletions(-) diff --git a/drivers/gpu/drm/hyperv/hyperv_drm_proto.c b/drivers/gpu/drm/hyperv/hyperv_drm_proto.c index f0ef627b4898..cea1ea2595cd 100644 --- a/drivers/gpu/drm/hyperv/hyperv_drm_proto.c +++ b/drivers/gpu/drm/hyperv/hyperv_drm_proto.c @@ -17,7 +17,7 @@ #define SYNTHVID_VER_GET_MAJOR(ver) (ver & 0x0000ffff) #define SYNTHVID_VER_GET_MINOR(ver) ((ver & 0xffff0000) >> 16) -/* Support for VERSION_WIN7 is removed. #define is retained for reference. */ +/* Support for WIN7 and WIN8 is removed. #define's retained for reference. */ #define SYNTHVID_VERSION_WIN7 SYNTHVID_VERSION(3, 0) #define SYNTHVID_VERSION_WIN8 SYNTHVID_VERSION(3, 2) #define SYNTHVID_VERSION_WIN10 SYNTHVID_VERSION(3, 5) @@ -557,23 +557,12 @@ int hv_drm_connect_vsp(struct hv_device *hdev) return ret; } - /* Negotiate the protocol version with host */ - switch (vmbus_proto_version) { - case VERSION_WIN10: - case VERSION_WIN10_V5: - ret = hv_drm_negotiate_version(hdev, SYNTHVID_VERSION_WIN10); - if (!ret) - break; - fallthrough; - case VERSION_WIN8: - case VERSION_WIN8_1: - ret = hv_drm_negotiate_version(hdev, SYNTHVID_VERSION_WIN8); - break; - default: - ret = hv_drm_negotiate_version(hdev, SYNTHVID_VERSION_WIN10); - break; - } - + /* + * Negotiate the protocol version with host. Since support for hosts + * older than WIN10 has been removed from Linux, only negotiate the + * WIN10 version. + */ + ret = hv_drm_negotiate_version(hdev, SYNTHVID_VERSION_WIN10); if (ret) { drm_err(dev, "Synthetic video device version not accepted %d\n", ret); goto error; @@ -581,11 +570,9 @@ int hv_drm_connect_vsp(struct hv_device *hdev) hv->screen_depth = SYNTHVID_DEPTH_WIN8; - if (hv_drm_version_ge(hv->synthvid_version, SYNTHVID_VERSION_WIN10)) { - ret = hv_drm_get_supported_resolution(hdev); - if (ret) - drm_err(dev, "Failed to get supported resolution from host, use default\n"); - } + ret = hv_drm_get_supported_resolution(hdev); + if (ret) + drm_err(dev, "Failed to get supported resolution from host, use default\n"); if (!hv->screen_width_max) { hv->screen_width_max = SYNTHVID_WIDTH_WIN8; -- 2.25.1