From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7FD34105F78B for ; Fri, 13 Mar 2026 10:09:56 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id EA02910EB6D; Fri, 13 Mar 2026 10:09:55 +0000 (UTC) X-Greylist: delayed 302 seconds by postgrey-1.36 at gabe; Fri, 13 Mar 2026 10:09:54 UTC Received: from TWMBX01.aspeed.com (mail.aspeedtech.com [211.20.114.72]) by gabe.freedesktop.org (Postfix) with ESMTPS id A7E3C10EB6D for ; Fri, 13 Mar 2026 10:09:54 +0000 (UTC) Received: from TWMBX01.aspeed.com (192.168.0.62) by TWMBX01.aspeed.com (192.168.0.62) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1748.10; Fri, 13 Mar 2026 18:04:49 +0800 Received: from [127.0.1.1] (192.168.10.13) by TWMBX01.aspeed.com (192.168.0.62) with Microsoft SMTP Server id 15.2.1748.10 via Frontend Transport; Fri, 13 Mar 2026 18:04:49 +0800 From: Jammy Huang Date: Fri, 13 Mar 2026 18:04:45 +0800 Subject: [PATCH] drm/ast: DisplayPort edid supports 256 bytes MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-ID: <20260313-upstream_ast_dp_edid-v1-1-2a75b7c091b2@aspeedtech.com> X-B4-Tracking: v=1; b=H4sIADzhs2kC/x3MMQqAMAxA0atIZgtqsYJXESnBpJpBLY2KIN7d4 viG/x9QTsIKffFA4ktU9i2jLguYFtxmNkLZ0FSNq2xtzRn1SIyrRz08Rc8kZNrADil0SNZBTmP iIPe/Hcb3/QChjKzYZgAAAA== X-Change-ID: 20260313-upstream_ast_dp_edid-5fe6adf7ad36 To: Dave Airlie , Thomas Zimmermann , Jocelyn Falempe , Maarten Lankhorst , Maxime Ripard , David Airlie , Simona Vetter CC: , , "Jammy Huang" X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1773396289; l=953; i=jammy_huang@aspeedtech.com; s=20251124; h=from:subject:message-id; bh=q+5Rngv8J3KnnMomdYe31TzEmI3IX581GOcBXpFbRMQ=; b=MoAxffeBfxK+iE9TOLE51LGrineVH6IM5f51EaJxGomKp8Jhri0bx4MdSomAtvqZesu3LL+c/ yvrr2E4cX4qBqlJ2MJGVErby9ltzNyMYu3kBSO8Y5ycmxrGTzBeRukK X-Developer-Key: i=jammy_huang@aspeedtech.com; a=ed25519; pk=E5YwijeJZZcuDR6srvwNlXrNHvLxwipUg3Mb/xxUF9o= X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" DisplayPort supports edid at most 256 bytes. Thus, allow it to fetch edid block 0 and 1. Signed-off-by: Jammy Huang --- ASPEED DisplayPort's EDID size can be 256 bytes at most. Thus, EDID blocks fetched can be 0 and 1. --- drivers/gpu/drm/ast/ast_dp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/ast/ast_dp.c b/drivers/gpu/drm/ast/ast_dp.c index 9d07dad358c..c938e1d6b1d 100644 --- a/drivers/gpu/drm/ast/ast_dp.c +++ b/drivers/gpu/drm/ast/ast_dp.c @@ -88,7 +88,7 @@ static int ast_astdp_read_edid_block(void *data, u8 *buf, unsigned int block, si int ret = 0; unsigned int i; - if (block > 0) + if (block > 1) return -EIO; /* extension headers not supported */ /* --- base-commit: 5ee8dbf54602dc340d6235b1d6aa17c0f283f48c change-id: 20260313-upstream_ast_dp_edid-5fe6adf7ad36 Best regards, -- Jammy Huang