From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 37E762584 for ; Thu, 23 Feb 2023 13:12:02 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B1D13C433D2; Thu, 23 Feb 2023 13:12:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1677157922; bh=4NpeXNkKztQgWnBJ1Mp2MpHtHvx/y+0D/p6NCQ0XCk8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cMx4a97G2MK/SuHz4iVP/0TuRg6dc6hlsMzPqH5ZwYFLVAMIwTRmu/yBen7jGnmUf J7NcjoEEJDuDBrQ7rG80m4Nbh8o5Eur8qIIIvEqrWLRt5FualDj3RRYQpH4l5fo9hu 4ttnL4lRa/bYP36JBGUVNhJIWRZnLVfEDDV+Sp6c= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Ankit Nautiyal , Uma Shankar , Jani Nikula , Maarten Lankhorst , Sasha Levin Subject: [PATCH 5.15 03/36] drm/edid: Fix minimum bpc supported with DSC1.2 for HDMI sink Date: Thu, 23 Feb 2023 14:06:39 +0100 Message-Id: <20230223130429.236181780@linuxfoundation.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230223130429.072633724@linuxfoundation.org> References: <20230223130429.072633724@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Ankit Nautiyal [ Upstream commit 18feaf6d0784dcba888859109676adf1e0260dfd ] HF-VSDB/SCDB has bits to advertise support for 16, 12 and 10 bpc. If none of the bits are set, the minimum bpc supported with DSC is 8. This patch corrects the min bpc supported to be 8, instead of 0. Fixes: 76ee7b905678 ("drm/edid: Parse DSC1.2 cap fields from HFVSDB block") Cc: Ankit Nautiyal Cc: Uma Shankar Cc: Jani Nikula Cc: Maarten Lankhorst v2: s/DSC1.2/DSC 1.2 Signed-off-by: Ankit Nautiyal Reviewed-by: Jani Nikula Signed-off-by: Jani Nikula Link: https://patchwork.freedesktop.org/patch/msgid/20220916100551.2531750-2-ankit.k.nautiyal@intel.com Signed-off-by: Sasha Levin --- drivers/gpu/drm/drm_edid.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 6ab048ba8021c..d940c76419c5a 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -4942,7 +4942,8 @@ static void drm_parse_hdmi_forum_vsdb(struct drm_connector *connector, else if (hf_vsdb[11] & DRM_EDID_DSC_10BPC) hdmi_dsc->bpc_supported = 10; else - hdmi_dsc->bpc_supported = 0; + /* Supports min 8 BPC if DSC 1.2 is supported*/ + hdmi_dsc->bpc_supported = 8; dsc_max_frl_rate = (hf_vsdb[12] & DRM_EDID_DSC_MAX_FRL_RATE_MASK) >> 4; drm_get_max_frl_rate(dsc_max_frl_rate, &hdmi_dsc->max_lanes, -- 2.39.0