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From:   Maxime Ripard <maxime@cerno.tech>
To:     Maxime Ripard <mripard@kernel.org>,
        Ben Skeggs <bskeggs@redhat.com>,
        David Airlie <airlied@linux.ie>, Chen-Yu Tsai <wens@csie.org>,
        Thomas Zimmermann <tzimmermann@suse.de>,
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        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
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        Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>,
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        =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>,
        Emma Anholt <emma@anholt.net>, Daniel Vetter <daniel@ffwll.ch>,
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Cc:     Maxime Ripard <maxime@cerno.tech>,
        Hans de Goede <hdegoede@redhat.com>,
        linux-arm-kernel@lists.infradead.org,
        Phil Elwell <phil@raspberrypi.com>,
        intel-gfx@lists.freedesktop.org,
        Dave Stevenson <dave.stevenson@raspberrypi.com>,
        dri-devel@lists.freedesktop.org, Dom Cobley <dom@raspberrypi.com>,
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        linux-sunxi@lists.linux.dev,
        Mateusz Kwiatkowski <kfyatek+publicgit@gmail.com>,
        Geert Uytterhoeven <geert@linux-m68k.org>
Subject: [PATCH v2 18/41] drm/connector: Add a function to lookup a TV mode by its name
Date:   Mon, 29 Aug 2022 15:11:32 +0200
Message-Id: <20220728-rpi-analog-tv-properties-v2-18-459522d653a7@cerno.tech>
In-Reply-To: <20220728-rpi-analog-tv-properties-v2-0-459522d653a7@cerno.tech>
References: <20220728-rpi-analog-tv-properties-v2-0-459522d653a7@cerno.tech>
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As part of the command line parsing rework coming in the next patches,=0D
we'll need to lookup drm_connector_tv_mode values by their name, already=0D
defined in drm_tv_mode_enum_list.=0D
=0D
In order to avoid any code duplication, let's do a function that will=0D
perform a lookup of a TV mode name and return its value.=0D
=0D
Signed-off-by: Maxime Ripard <maxime@cerno.tech>=0D
=0D
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connecto=
r.c=0D
index b1fcacd150e8..0fe01a1c20ad 100644=0D
--- a/drivers/gpu/drm/drm_connector.c=0D
+++ b/drivers/gpu/drm/drm_connector.c=0D
@@ -1003,6 +1003,30 @@ static const struct drm_prop_enum_list drm_tv_mode_e=
num_list[] =3D {=0D
 };=0D
 DRM_ENUM_NAME_FN(drm_get_tv_mode_name, drm_tv_mode_enum_list)=0D
 =0D
+/**=0D
+ * drm_get_tv_mode_from_name - Translates a TV mode name into its enum val=
ue=0D
+ * @name: TV Mode name we want to convert=0D
+ * @len: Length of @name=0D
+ *=0D
+ * Translates @name into an enum drm_connector_tv_mode.=0D
+ *=0D
+ * Returns: the enum value on success, a negative errno otherwise.=0D
+ */=0D
+int drm_get_tv_mode_from_name(const char *name, size_t len)=0D
+{=0D
+	unsigned int i;=0D
+=0D
+	for (i =3D 0; i < ARRAY_SIZE(drm_tv_mode_enum_list); i++) {=0D
+		const struct drm_prop_enum_list *item =3D &drm_tv_mode_enum_list[i];=0D
+=0D
+		if (strlen(item->name) =3D=3D len && !strncmp(item->name, name, len))=0D
+			return item->type;=0D
+	}=0D
+=0D
+	return -EINVAL;=0D
+}=0D
+EXPORT_SYMBOL(drm_get_tv_mode_from_name)=0D
+=0D
 static const struct drm_prop_enum_list drm_tv_select_enum_list[] =3D {=0D
 	{ DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */=
=0D
 	{ DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */=0D
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h=0D
index bb39d2bb806e..49d261977d4e 100644=0D
--- a/include/drm/drm_connector.h=0D
+++ b/include/drm/drm_connector.h=0D
@@ -1943,6 +1943,8 @@ const char *drm_get_dp_subconnector_name(int val);=0D
 const char *drm_get_content_protection_name(int val);=0D
 const char *drm_get_hdcp_content_type_name(int val);=0D
 =0D
+int drm_get_tv_mode_from_name(const char *name, size_t len);=0D
+=0D
 int drm_mode_create_dvi_i_properties(struct drm_device *dev);=0D
 void drm_connector_attach_dp_subconnector_property(struct drm_connector *c=
onnector);=0D
 =0D
=0D
-- =0D
b4 0.10.0-dev-65ba7=0D