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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E5C95C35274 for ; Thu, 14 Apr 2022 14:30:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350989AbiDNO3j (ORCPT ); Thu, 14 Apr 2022 10:29:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46750 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344164AbiDNNkF (ORCPT ); Thu, 14 Apr 2022 09:40:05 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6A90DCCB; Thu, 14 Apr 2022 06:37:40 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 06AAC61BA7; Thu, 14 Apr 2022 13:37:40 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 14CA2C385A1; Thu, 14 Apr 2022 13:37:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1649943459; bh=+KSWGZLsyCxV17kI15AtxAUl4b0L3AxImXHMggeHEKY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tSxE+TUeRhdfPZKpFJqu2hl5olEkjXf80bt4v24ulrDnBSvPP1GeZLyGiQmxYkV4z URHkGdEq689C6G2D2L2L5jMTR8ohA0+QI0bWG0Y/qQLPfdHBRbegBwN6ppFXUXb9K8 yGkPHVcKztraCcMFMKr1F0/Cbf35HvGlzhQdtEG0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Maxime Ripard , =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= , Sasha Levin Subject: [PATCH 5.4 162/475] drm/edid: Dont clear formats if using deep color Date: Thu, 14 Apr 2022 15:09:07 +0200 Message-Id: <20220414110859.672777855@linuxfoundation.org> X-Mailer: git-send-email 2.35.2 In-Reply-To: <20220414110855.141582785@linuxfoundation.org> References: <20220414110855.141582785@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Maxime Ripard [ Upstream commit 75478b3b393bcbdca4e6da76fe3a9f1a4133ec5d ] The current code, when parsing the EDID Deep Color depths, that the YUV422 cannot be used, referring to the HDMI 1.3 Specification. This specification, in its section 6.2.4, indeed states: For each supported Deep Color mode, RGB 4:4:4 shall be supported and optionally YCBCR 4:4:4 may be supported. YCBCR 4:2:2 is not permitted for any Deep Color mode. This indeed can be interpreted like the code does, but the HDMI 1.4 specification further clarifies that statement in its section 6.2.4: For each supported Deep Color mode, RGB 4:4:4 shall be supported and optionally YCBCR 4:4:4 may be supported. YCBCR 4:2:2 is also 36-bit mode but does not require the further use of the Deep Color modes described in section 6.5.2 and 6.5.3. This means that, even though YUV422 can be used with 12 bit per color, it shouldn't be treated as a deep color mode. This is also broken with YUV444 if it's supported by the display, but DRM_EDID_HDMI_DC_Y444 isn't set. In such a case, the code will clear color_formats of the YUV444 support set previously in drm_parse_cea_ext(), but will not set it back. Since the formats supported are already setup properly in drm_parse_cea_ext(), let's just remove the code modifying the formats in drm_parse_hdmi_deep_color_info() Fixes: d0c94692e0a3 ("drm/edid: Parse and handle HDMI deep color modes.") Signed-off-by: Maxime Ripard Reviewed-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20220120151625.594595-3-maxime@cerno.tech Signed-off-by: Sasha Levin --- drivers/gpu/drm/drm_edid.c | 8 -------- 1 file changed, 8 deletions(-) --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -4534,16 +4534,8 @@ static void drm_parse_hdmi_deep_color_in connector->name, dc_bpc); info->bpc = dc_bpc; - /* - * Deep color support mandates RGB444 support for all video - * modes and forbids YCRCB422 support for all video modes per - * HDMI 1.3 spec. - */ - info->color_formats = DRM_COLOR_FORMAT_RGB444; - /* YCRCB444 is optional according to spec. */ if (hdmi[6] & DRM_EDID_HDMI_DC_Y444) { - info->color_formats |= DRM_COLOR_FORMAT_YCRCB444; DRM_DEBUG("%s: HDMI sink does YCRCB444 in deep color.\n", connector->name); }