From nobody Tue Apr 7 11:19:09 2026 Received: from TWMBX01.aspeed.com (mail.aspeedtech.com [211.20.114.72]) (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 9DE7C3806BB for ; Fri, 13 Mar 2026 10:04:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=211.20.114.72 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773396294; cv=none; b=moGO9pXNshs5oypVkLQjgeQYaDzrrjPQOpdXjvn+jQGlqFlcbBh/EMnexw4Zkm5nTd73KqWZbLKrltUkwCrgepxsVgTX3GChvB4cBArGn7gjtdUQqbN57QoQdNKj0A/xIsF0IHlTg/rKLA3/9ch6sDJ+7HI02RQ/pQqZV0V0SSs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773396294; c=relaxed/simple; bh=q+5Rngv8J3KnnMomdYe31TzEmI3IX581GOcBXpFbRMQ=; h=From:Date:Subject:MIME-Version:Content-Type:Message-ID:To:CC; b=bZ/3IJfjN4HYwcw1qiQz/tmUwWPZXgLDb9GW7ASNmJUK2qSwmG/JaXQm1ABW4GQ5Xd16MOF/I5G9b8XRO46PsFoRHrz24eVEiPewTDUl/d+BEprgushmcSkOEnz+xss9E457Sv43nvs858isU5vKNW9Ix0QqCXXm8RGFBVRzdQo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=aspeedtech.com; spf=pass smtp.mailfrom=aspeedtech.com; arc=none smtp.client-ip=211.20.114.72 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=aspeedtech.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=aspeedtech.com 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 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 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= 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 =3D 0; unsigned int i; =20 - if (block > 0) + if (block > 1) return -EIO; /* extension headers not supported */ =20 /* --- base-commit: 5ee8dbf54602dc340d6235b1d6aa17c0f283f48c change-id: 20260313-upstream_ast_dp_edid-5fe6adf7ad36 Best regards, --=20 Jammy Huang