linux-kernel - [PATCH v1 13/35] drm/atomic-helper: Add a TV properties reset helper

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Message-Id: <20220728-rpi-analog-tv-properties-v1-13-3d53ae722097@cerno.tech>
Date:   Fri, 29 Jul 2022 18:34:56 +0200
From:   Maxime Ripard <maxime@...no.tech>
To:     Jernej Skrabec <jernej.skrabec@...il.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Jerome Brunet <jbrunet@...libre.com>,
        Samuel Holland <samuel@...lland.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Daniel Vetter <daniel@...ll.ch>, Emma Anholt <emma@...olt.net>,
        David Airlie <airlied@...ux.ie>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Noralf Trønnes <noralf@...nnes.org>,
        Kevin Hilman <khilman@...libre.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Maxime Ripard <mripard@...nel.org>
Cc:     Maxime Ripard <maxime@...no.tech>, linux-sunxi@...ts.linux.dev,
        linux-kernel@...r.kernel.org, Phil Elwell <phil@...pberrypi.com>,
        Mateusz Kwiatkowski <kfyatek+publicgit@...il.com>,
        linux-arm-kernel@...ts.infradead.org,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Dave Stevenson <dave.stevenson@...pberrypi.com>,
        linux-amlogic@...ts.infradead.org, dri-devel@...ts.freedesktop.org,
        Dom Cobley <dom@...pberrypi.com>
Subject: [PATCH v1 13/35] drm/atomic-helper: Add a TV properties reset helper

The drm_tv_create_properties() function will create a bunch of properties,
but it's up to each and every driver using that function to properly reset
the state of these properties leading to inconsistent behaviours.

Let's create a helper that will take care of it.

Signed-off-by: Maxime Ripard <maxime@...no.tech>

diff --git a/drivers/gpu/drm/drm_atomic_state_helper.c b/drivers/gpu/drm/drm_atomic_state_helper.c
index dfb57217253b..6d14cb0c64b1 100644
--- a/drivers/gpu/drm/drm_atomic_state_helper.c
+++ b/drivers/gpu/drm/drm_atomic_state_helper.c
@@ -481,6 +481,77 @@ void drm_atomic_helper_connector_tv_margins_reset(struct drm_connector *connecto
 }
 EXPORT_SYMBOL(drm_atomic_helper_connector_tv_margins_reset);
 
+/**
+ * drm_atomic_helper_connector_tv_reset - Resets Analog TV connector properties
+ * @connector: DRM connector
+ *
+ * Resets the analog TV properties attached to a connector
+ */
+void drm_atomic_helper_connector_tv_reset(struct drm_connector *connector)
+{
+	struct drm_device *dev = connector->dev;
+	struct drm_connector_state *state = connector->state;
+	struct drm_property *prop;
+	uint64_t val;
+
+	prop = dev->mode_config.tv_norm_property;
+	if (prop)
+		if (!drm_object_property_get_default_value(&connector->base,
+							   prop, &val))
+			state->tv.norm = val;
+
+	prop = dev->mode_config.tv_select_subconnector_property;
+	if (prop)
+		if (!drm_object_property_get_default_value(&connector->base,
+							   prop, &val))
+			state->tv.select_subconnector = val;
+
+	prop = dev->mode_config.tv_subconnector_property;
+	if (prop)
+		if (!drm_object_property_get_default_value(&connector->base,
+							   prop, &val))
+			state->tv.subconnector = val;
+
+	prop = dev->mode_config.tv_brightness_property;
+	if (prop)
+		if (!drm_object_property_get_default_value(&connector->base,
+							   prop, &val))
+			state->tv.brightness = val;
+
+	prop = dev->mode_config.tv_contrast_property;
+	if (prop)
+		if (!drm_object_property_get_default_value(&connector->base,
+							   prop, &val))
+			state->tv.contrast = val;
+
+	prop = dev->mode_config.tv_flicker_reduction_property;
+	if (prop)
+		if (!drm_object_property_get_default_value(&connector->base,
+							   prop, &val))
+			state->tv.flicker_reduction = val;
+
+	prop = dev->mode_config.tv_overscan_property;
+	if (prop)
+		if (!drm_object_property_get_default_value(&connector->base,
+							   prop, &val))
+			state->tv.overscan = val;
+
+	prop = dev->mode_config.tv_saturation_property;
+	if (prop)
+		if (!drm_object_property_get_default_value(&connector->base,
+							   prop, &val))
+			state->tv.saturation = val;
+
+	prop = dev->mode_config.tv_hue_property;
+	if (prop)
+		if (!drm_object_property_get_default_value(&connector->base,
+							   prop, &val))
+			state->tv.hue = val;
+
+	drm_atomic_helper_connector_tv_margins_reset(connector);
+}
+EXPORT_SYMBOL(drm_atomic_helper_connector_tv_reset);
+
 /**
  * __drm_atomic_helper_connector_duplicate_state - copy atomic connector state
  * @connector: connector object
diff --git a/include/drm/drm_atomic_state_helper.h b/include/drm/drm_atomic_state_helper.h
index 192766656b88..c8fbce795ee7 100644
--- a/include/drm/drm_atomic_state_helper.h
+++ b/include/drm/drm_atomic_state_helper.h
@@ -70,6 +70,7 @@ void __drm_atomic_helper_connector_state_reset(struct drm_connector_state *conn_
 void __drm_atomic_helper_connector_reset(struct drm_connector *connector,
 					 struct drm_connector_state *conn_state);
 void drm_atomic_helper_connector_reset(struct drm_connector *connector);
+void drm_atomic_helper_connector_tv_reset(struct drm_connector *connector);
 void drm_atomic_helper_connector_tv_margins_reset(struct drm_connector *connector);
 void
 __drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector,

-- 
b4 0.10.0-dev-49460