From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 8C11F5237B8 for ; Wed, 16 Sep 2026 15:29:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789572561; cv=none; b=MUo8B0Ch/sOkOLfF/j5J3gKjxYmL+1x0jdGTDlpGsiluDSWL1lj4+7egV/e+6ePa85QHpEb1lI8+iNnvMX+wfyRqGhf1Rxtw3hApfNimBzntMp6Ym4nDnBioIDfrGiSyhKBBXQBKXGkTexUDzhHWdvGIFm4vFb4T6MH9bxersMI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789572561; c=relaxed/simple; bh=3B/QEllsPo0NHJSq0aVhccBnV97t2qqpfaosF3yEads=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=BqyMJ4MkC1rAHV/siDj/zdaMe+JYwVjo46fC29vVz3fXEDwzHXUD0BRH5AZhxUeMhYeIwmxE1BHSCugPTmGNGb2wni82tFbhZIHJ4cVTi2E8AGBpQQ/kf7ffRD+P02+fwMTNcH7hsV/FQWoPKoUH70EIgo9/SL8W6pXxwW+3ER0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=REqB/tQ5; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="REqB/tQ5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 423341F00898; Wed, 16 Sep 2026 15:29:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789572555; bh=sI7N3xvItk4Npcn9tcIecNhgVCPwC/5mF503ds1nG3E=; h=Subject:To:Cc:From:Date; b=REqB/tQ5duBwEPgzxMKdeTKJyxgvx29F90vPJVmBgevwuEQnSC+obz0IkrVTjPLrp WwNOAG7G2U58xjq8fUfkKE2pb2su/nkID90er0QhukUP6Udrlih2SDkL3Zas3F4SS9 sssv8tShCOfYBeHAU2xl8obD8xo5d5nqTobVKTKE= Subject: FAILED: patch "[PATCH] drm/amd/display: Propagate HDMI RGB quantization" failed to apply to 6.18-stable tree To: sroy14@alum.utk.edu,alex.hung@amd.com,alexander.deucher@amd.com,daniel.wheeler@amd.com Cc: From: Date: Wed, 16 Sep 2026 16:19:44 +0100 Message-ID: <2026091644-upheld-bride-0921@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit The patch below does not apply to the 6.18-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.18.y git checkout FETCH_HEAD git cherry-pick -x bdcd0411d7d186225a52458fd42bb70d54ca917a # git commit -s git send-email --to '' --in-reply-to '2026091644-upheld-bride-0921@gregkh' --subject-prefix 'PATCH 6.18.y' 'HEAD^..' Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From bdcd0411d7d186225a52458fd42bb70d54ca917a Mon Sep 17 00:00:00 2001 From: Satyajit Roy Date: Sun, 30 Aug 2026 03:51:58 +0000 Subject: [PATCH] drm/amd/display: Propagate HDMI RGB quantization selectability DC uses dc_edid_caps.qs_bit when constructing the HDMI AVI InfoFrame quantization-range field. Although DRM parses the sink capability into drm_display_info, DM never copies it into the DC EDID capabilities. The field therefore remains zero and the AVI quantization range stays at its default value. Copy rgb_quant_range_selectable for HDMI sinks and extend the existing EDID-capability KUnit test to cover it. Fixes: 6eb4c13a3845 ("drm/amd/display: Support "Broadcast RGB" drm property") Signed-off-by: Satyajit Roy Reviewed-by: Alex Hung Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher (cherry picked from commit 892659399f64642e33072562a11ec1b2e7bd2263) Cc: stable@vger.kernel.org diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c index 249e0cd995c6..298de7b75ca8 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c @@ -200,6 +200,7 @@ enum dc_edid_status dm_helpers_parse_edid_caps( edid_caps->edid_hdmi = connector->display_info.is_hdmi; if (edid_caps->edid_hdmi) { + edid_caps->qs_bit = connector->display_info.rgb_quant_range_selectable; populate_hdmi_info_from_connector(link->dc->config.enable_frl, &connector->display_info.hdmi, edid_caps); drm_dbg_driver(connector->dev, "%s: HDMI_FRL [%s] max_frl_rate %d\n", __func__, connector->name, edid_caps->max_frl_rate); if (edid_caps->frl_dsc_support) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_helpers_test.c b/drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_helpers_test.c index 0c4517fb9d75..82e0c984693c 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_helpers_test.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_helpers_test.c @@ -358,12 +358,14 @@ static void dm_test_parse_edid_caps_hdmi_frl(struct kunit *test) /* Drive the HDMI/FRL branch */ connector->display_info.is_hdmi = true; + connector->display_info.rgb_quant_range_selectable = true; connector->display_info.hdmi.scdc.supported = true; connector->display_info.hdmi.max_lanes = 4; connector->display_info.hdmi.max_frl_rate_per_lane = 12; KUNIT_EXPECT_EQ(test, dm_helpers_parse_edid_caps(link, dc_edid, edid_caps), EDID_OK); KUNIT_EXPECT_TRUE(test, edid_caps->edid_hdmi); + KUNIT_EXPECT_EQ(test, edid_caps->qs_bit, 1); KUNIT_EXPECT_TRUE(test, edid_caps->scdc_present); /* max_lanes 4 + max_frl_rate_per_lane 12 -> rate index 6 */ KUNIT_EXPECT_EQ(test, edid_caps->max_frl_rate, 6);