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mx.zohomail.com; dkim=pass header.i=collabora.com; spf=pass smtp.mailfrom=nicolas.frattaroli@collabora.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1776074933; s=zohomail; d=collabora.com; i=nicolas.frattaroli@collabora.com; h=From:From:Date:Date:Subject:Subject:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-Id:Message-Id:References:In-Reply-To:To:To:Cc:Cc:Reply-To; bh=5k1vlW62iXZjcOaFsSXyeVWlBMQFrsYlNjKb9M5MyLE=; b=O3e1Ns5JGpUNOvqJEaYekci2tHRhWGdHAGiiSJVGZwmlcOzj2ZmEvw7s3likwBUO +XPhHUJ+qYGz5f6GjwVXp423CkBMbbjS1pFbO5eN6xpeWEHULG7KEwlMyFDC3dMVFzR MI/8BpM2PhrnnzkgSe35fVA0Vlv/jlTFckA0q9/8= Received: by mx.zohomail.com with SMTPS id 1776074931930102.89146521052896; Mon, 13 Apr 2026 03:08:51 -0700 (PDT) From: Nicolas Frattaroli Date: Mon, 13 Apr 2026 12:07:22 +0200 Subject: [PATCH v13 08/27] drm/display: hdmi-state-helper: Act on color format DRM property MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260413-color-format-v13-8-ab37d4dfba48@collabora.com> References: <20260413-color-format-v13-0-ab37d4dfba48@collabora.com> In-Reply-To: <20260413-color-format-v13-0-ab37d4dfba48@collabora.com> To: Harry Wentland , Leo Li , Rodrigo Siqueira , Alex Deucher , =?utf-8?q?Christian_K=C3=B6nig?= , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Sandy Huang , =?utf-8?q?Heiko_St=C3=BCbner?= , Andy Yan , Jani Nikula , Rodrigo Vivi , Joonas Lahtinen , Tvrtko Ursulin , Dmitry Baryshkov , Sascha Hauer , Rob Herring , Jonathan Corbet , Shuah Khan Cc: kernel@collabora.com, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org, linux-doc@vger.kernel.org, Nicolas Frattaroli , Dmitry Baryshkov X-Mailer: b4 0.15.2 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260413_030927_610145_2A2177B2 X-CRM114-Status: GOOD ( 11.99 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org With the introduction of the "color format" DRM property, which allows userspace to request a specific color format, the HDMI state helper should implement this. Implement it by translating the requested drm_connector_color_format to a drm_output_color_format enum value as per the logic HDMI should use for this: Auto is translated to RGB, and a fallback to YUV420 is only performed if the original color format was auto. Reviewed-by: Dmitry Baryshkov Reviewed-by: Maxime Ripard Signed-off-by: Nicolas Frattaroli --- drivers/gpu/drm/display/drm_hdmi_state_helper.c | 31 +++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/drivers/gpu/drm/display/drm_hdmi_state_helper.c b/drivers/gpu/drm/display/drm_hdmi_state_helper.c index a0d88701d236..954f8b2973fc 100644 --- a/drivers/gpu/drm/display/drm_hdmi_state_helper.c +++ b/drivers/gpu/drm/display/drm_hdmi_state_helper.c @@ -670,8 +670,39 @@ hdmi_compute_config(const struct drm_connector *connector, unsigned int max_bpc = clamp_t(unsigned int, conn_state->max_bpc, 8, connector->max_bpc); + enum drm_output_color_format fmt; int ret; + if (conn_state->color_format != DRM_CONNECTOR_COLOR_FORMAT_AUTO) { + switch (conn_state->color_format) { + case DRM_CONNECTOR_COLOR_FORMAT_AUTO: + drm_warn(connector->dev, "AUTO format in non-AUTO path.\n"); + fallthrough; + case DRM_CONNECTOR_COLOR_FORMAT_RGB444: + fmt = DRM_OUTPUT_COLOR_FORMAT_RGB444; + break; + case DRM_CONNECTOR_COLOR_FORMAT_YCBCR444: + fmt = DRM_OUTPUT_COLOR_FORMAT_YCBCR444; + break; + case DRM_CONNECTOR_COLOR_FORMAT_YCBCR422: + fmt = DRM_OUTPUT_COLOR_FORMAT_YCBCR422; + break; + case DRM_CONNECTOR_COLOR_FORMAT_YCBCR420: + fmt = DRM_OUTPUT_COLOR_FORMAT_YCBCR420; + break; + default: + drm_dbg_kms(connector->dev, "HDMI does not support color format '%d'.\n", + conn_state->color_format); + return -EINVAL; + } + + return hdmi_compute_format_bpc(connector, conn_state, mode, max_bpc, fmt); + } + + /* + * For %DRM_CONNECTOR_COLOR_FORMAT_AUTO, try RGB first, and fall back + * to the less bandwidth-intensive YCBCR420 if RGB fails. + */ ret = hdmi_compute_format_bpc(connector, conn_state, mode, max_bpc, DRM_OUTPUT_COLOR_FORMAT_RGB444); if (ret) { -- 2.53.0