linux-kernel - [PATCH v9 10/10] drm/vc4: hdmi: use drm_atomic_helper_connector_hdmi

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Message-Id: <20241223-drm-bridge-hdmi-connector-v9-10-6ce16bcedb8b@linaro.org>
Date: Mon, 23 Dec 2024 04:59:01 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Andrzej Hajda <andrzej.hajda@...el.com>, 
 Neil Armstrong <neil.armstrong@...aro.org>, Robert Foss <rfoss@...nel.org>, 
 Laurent Pinchart <Laurent.pinchart@...asonboard.com>, 
 Jonas Karlman <jonas@...boo.se>, Jernej Skrabec <jernej.skrabec@...il.com>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
 Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>, 
 Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, 
 Phong LE <ple@...libre.com>, Inki Dae <inki.dae@...sung.com>, 
 Seung-Woo Kim <sw0312.kim@...sung.com>, 
 Kyungmin Park <kyungmin.park@...sung.com>, 
 Krzysztof Kozlowski <krzk@...nel.org>, 
 Alim Akhtar <alim.akhtar@...sung.com>, Russell King <linux@...linux.org.uk>, 
 Chun-Kuang Hu <chunkuang.hu@...nel.org>, 
 Philipp Zabel <p.zabel@...gutronix.de>, 
 Matthias Brugger <matthias.bgg@...il.com>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
 Sandy Huang <hjc@...k-chips.com>, 
 Heiko Stübner <heiko@...ech.de>, 
 Andy Yan <andy.yan@...k-chips.com>, Alain Volmat <alain.volmat@...s.st.com>, 
 Raphael Gallais-Pou <rgallaispou@...il.com>, 
 Dave Stevenson <dave.stevenson@...pberrypi.com>, 
 Maíra Canal <mcanal@...lia.com>, 
 Raspberry Pi Kernel Maintenance <kernel-list@...pberrypi.com>
Cc: Jani Nikula <jani.nikula@...ux.intel.com>, 
 dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 linux-sound@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-samsung-soc@...r.kernel.org, linux-mediatek@...ts.infradead.org, 
 linux-rockchip@...ts.infradead.org
Subject: [PATCH v9 10/10] drm/vc4: hdmi: use
 drm_atomic_helper_connector_hdmi_hotplug()

Use the helper function to update the connector's information. This
makes sure that HDMI-related events are handled in a generic way.
Currently it is limited to the HDMI state reporting to the sound system.

Acked-by: Maxime Ripard <mripard@...nel.org>
Tested-by: Dave Stevenson <dave.stevenson@...pberrypi.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
---
 drivers/gpu/drm/vc4/vc4_hdmi.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 5282dd765cc9478361a705dca85f615015b12e8e..82eeb08c183420b000b351da1e05f9a47baeda90 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -383,7 +383,6 @@ static void vc4_hdmi_handle_hotplug(struct vc4_hdmi *vc4_hdmi,
 				    enum drm_connector_status status)
 {
 	struct drm_connector *connector = &vc4_hdmi->connector;
-	const struct drm_edid *drm_edid;
 	int ret;
 
 	/*
@@ -405,17 +404,14 @@ static void vc4_hdmi_handle_hotplug(struct vc4_hdmi *vc4_hdmi,
 		return;
 	}
 
-	drm_edid = drm_edid_read_ddc(connector, vc4_hdmi->ddc);
+	drm_atomic_helper_connector_hdmi_hotplug(connector, status);
 
-	drm_edid_connector_update(connector, drm_edid);
 	cec_s_phys_addr(vc4_hdmi->cec_adap,
 			connector->display_info.source_physical_address, false);
 
-	if (!drm_edid)
+	if (status != connector_status_connected)
 		return;
 
-	drm_edid_free(drm_edid);
-
 	for (;;) {
 		ret = vc4_hdmi_reset_link(connector, ctx);
 		if (ret == -EDEADLK) {
@@ -549,6 +545,7 @@ static void vc4_hdmi_connector_reset(struct drm_connector *connector)
 }
 
 static const struct drm_connector_funcs vc4_hdmi_connector_funcs = {
+	.force = drm_atomic_helper_connector_hdmi_force,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.reset = vc4_hdmi_connector_reset,
 	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,

-- 
2.39.5