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 9C5C93C8714 for ; Thu, 23 Apr 2026 10:19:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776939576; cv=none; b=VRQtBqvbVOxSCPIP+DY4O3a1UFoaZm9Foz399+0oos0dWRZqpoz86vFVoX9vRnZVuZ14rR4XVjqWPyiucxRbNQK6BKWOEV8eSGP7Cld1ijgXWW1wNuP/p3gWMUeiB+SNPavic+D4fMXOzDg8Mar6FyuSewt1Ggd82PtmDQ4iMs8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776939576; c=relaxed/simple; bh=DtbejoZC6kHnpLa4bta4bjDRktLOYJqY8pkgAwDp6dI=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=UTPa4Qu9gZ972AacIjGNbO3nbeQZXBhdsYj/swIi+V4Qn/6tyEoZ5HLLvguS06lHSfRubjxZ2M5ODy604PjLmZrKYbR7krVJbadBkYK5XvqBvbRivx4MRtsyaXXVTGkaJyuhwJjHrI0fq6Oxx2Llxxg5WNfpuQDEIm8dwZRaCEA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=aHwuW3iM; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="aHwuW3iM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EF700C2BCAF; Thu, 23 Apr 2026 10:19:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1776939576; bh=DtbejoZC6kHnpLa4bta4bjDRktLOYJqY8pkgAwDp6dI=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=aHwuW3iMDmYxr/k7TxjjA+CLx9VTcaB5w/QMsXHKAsrlLKvPmBN6Uz1C/qhf4poxU fOwDzwoWMS4YNmJRbJw0/pEdt2/1AZo5cwVYwwtL2+WeAzH3rkT5MROEFcP/teDVkO xubQkDMGeQ88koflCpRT2kKH8h2jjchq4yssnv43nW0Nh6UzZUVK+fW21SjbOJi99T wbStNrNgGCSrDJnupVf66Odr7yY2Hj+ZKnI3Zfmg5fqWlGE/RiSML5cONEkzNgPSNQ MBz1VZC/qcLhT1OKjxY2QSUvhy0bZCza9LNKekBIUO2G/OkB2FoXCTu3x+PTU0m7Xk vMI5ML99+Ne2A== From: Maxime Ripard Date: Thu, 23 Apr 2026 12:18:36 +0200 Subject: [PATCH v2 23/28] drm/bridge: display-connector: Implement readout support 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: 7bit Message-Id: <20260423-drm-state-readout-v2-23-8549f87cb978@kernel.org> References: <20260423-drm-state-readout-v2-0-8549f87cb978@kernel.org> In-Reply-To: <20260423-drm-state-readout-v2-0-8549f87cb978@kernel.org> To: Maarten Lankhorst , Thomas Zimmermann , David Airlie , Simona Vetter , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Jyri Sarha , Tomi Valkeinen Cc: Devarsh Thakkar , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Maxime Ripard X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=2411; i=mripard@kernel.org; h=from:subject:message-id; bh=DtbejoZC6kHnpLa4bta4bjDRktLOYJqY8pkgAwDp6dI=; b=owGbwMvMwCmsHn9OcpHtvjLG02pJDJkvP35MvZ51QdlSxE9BVN8qUPHXqhIzTv/enP+zHHzOr PCLm9DQMZWFQZiTQVZMkeWJTNjp5e2LqxzsV/6AmcPKBDKEgYtTACay7xhjw9lvKfN6V5WuV3NZ 2FUceGaGvPZv85VnmflV7OyMFyVZP5rSbneYe1/Qnfw98w4HFBsHMzY8zrbnSpjD5zw1iSNDyiJ A59WKlxnFalfqGi4G32VcKH3t0Cp3Cd7/u+e79V0LkxZmlgUA X-Developer-Key: i=mripard@kernel.org; a=openpgp; fpr=BE5675C37E818C8B5764241C254BCFC56BF6CE8D The display-connector bridge is the last bridge in the chain on platforms using drm_bridge_connector, and is responsible for the physical connector interface. Implement the atomic_sro_readout_state hook and wire up the default drm_atomic_helper_bridge_compare_state() as the compare hook. Signed-off-by: Maxime Ripard --- drivers/gpu/drm/bridge/display-connector.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/gpu/drm/bridge/display-connector.c b/drivers/gpu/drm/bridge/display-connector.c index 16c0631adeb1..94b645248368 100644 --- a/drivers/gpu/drm/bridge/display-connector.c +++ b/drivers/gpu/drm/bridge/display-connector.c @@ -12,10 +12,11 @@ #include #include #include #include +#include #include #include struct display_connector { struct drm_bridge bridge; @@ -173,19 +174,33 @@ static u32 *display_connector_get_input_bus_fmts(struct drm_bridge *bridge, return prev_bridge->funcs->atomic_get_input_bus_fmts(prev_bridge, prev_bridge_state, crtc_state, conn_state, output_fmt, num_input_fmts); } +static int +display_connector_readout_state(struct drm_bridge *bridge, + struct drm_atomic_sro_state *state, + struct drm_bridge_state *bridge_state, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state) +{ + // TODO: Actually implement it + + return 0; +} + static const struct drm_bridge_funcs display_connector_bridge_funcs = { .attach = display_connector_attach, .detect = display_connector_bridge_detect, .edid_read = display_connector_edid_read, .atomic_get_output_bus_fmts = display_connector_get_output_bus_fmts, .atomic_get_input_bus_fmts = display_connector_get_input_bus_fmts, .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, .atomic_reset = drm_atomic_helper_bridge_reset, + .atomic_sro_readout_state = display_connector_readout_state, + .atomic_sro_compare_state = drm_atomic_helper_bridge_compare_state, }; static irqreturn_t display_connector_hpd_irq(int irq, void *arg) { struct display_connector *conn = arg; -- 2.53.0