From: Maxime Ripard <maxime@cerno.tech>
To: Jonas Karlman <jonas@kwiboo.se>, Sam Ravnborg <sam@ravnborg.org>,
Jernej Skrabec <jernej.skrabec@gmail.com>,
Thierry Reding <thierry.reding@gmail.com>,
Daniel Vetter <daniel.vetter@intel.com>,
David Airlie <airlied@linux.ie>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Thomas Zimmermann <tzimmermann@suse.de>,
Maxime Ripard <maxime@cerno.tech>,
Neil Armstrong <narmstrong@baylibre.com>,
Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
Robert Foss <robert.foss@linaro.org>,
Andrzej Hajda <a.hajda@samsung.com>
Cc: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org
Subject: [PATCH v3 3/8] drm/mipi-dsi: Create devm device registration
Date: Mon, 23 Aug 2021 10:47:18 +0200 [thread overview]
Message-ID: <20210823084723.1493908-4-maxime@cerno.tech> (raw)
In-Reply-To: <20210823084723.1493908-1-maxime@cerno.tech>
Devices that take their data through the MIPI-DSI bus but are controlled
through a secondary bus like I2C have to register a secondary device on
the MIPI-DSI bus through the mipi_dsi_device_register_full() function.
At removal or when an error occurs, that device needs to be removed
through a call to mipi_dsi_device_unregister().
Let's create a device-managed variant of the registration function that
will automatically unregister the device at unbind.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
drivers/gpu/drm/drm_mipi_dsi.c | 46 ++++++++++++++++++++++++++++++++++
include/drm/drm_mipi_dsi.h | 3 +++
2 files changed, 49 insertions(+)
diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
index 5dd475e82995..ddf67463eaa1 100644
--- a/drivers/gpu/drm/drm_mipi_dsi.c
+++ b/drivers/gpu/drm/drm_mipi_dsi.c
@@ -246,6 +246,52 @@ void mipi_dsi_device_unregister(struct mipi_dsi_device *dsi)
}
EXPORT_SYMBOL(mipi_dsi_device_unregister);
+static void devm_mipi_dsi_device_unregister(void *arg)
+{
+ struct mipi_dsi_device *dsi = arg;
+
+ mipi_dsi_device_unregister(dsi);
+}
+
+/**
+ * devm_mipi_dsi_device_register_full - create a managed MIPI DSI device
+ * @dev: device to tie the MIPI-DSI device lifetime to
+ * @host: DSI host to which this device is connected
+ * @info: pointer to template containing DSI device information
+ *
+ * Create a MIPI DSI device by using the device information provided by
+ * mipi_dsi_device_info template
+ *
+ * This is the managed version of mipi_dsi_device_register_full() which
+ * automatically calls mipi_dsi_device_unregister() when @dev is
+ * unbound.
+ *
+ * Returns:
+ * A pointer to the newly created MIPI DSI device, or, a pointer encoded
+ * with an error
+ */
+struct mipi_dsi_device *
+devm_mipi_dsi_device_register_full(struct device *dev,
+ struct mipi_dsi_host *host,
+ const struct mipi_dsi_device_info *info)
+{
+ struct mipi_dsi_device *dsi;
+ int ret;
+
+ dsi = mipi_dsi_device_register_full(host, info);
+ if (IS_ERR(dsi))
+ return dsi;
+
+ ret = devm_add_action_or_reset(dev,
+ devm_mipi_dsi_device_unregister,
+ dsi);
+ if (ret)
+ return ERR_PTR(ret);
+
+ return dsi;
+}
+EXPORT_SYMBOL_GPL(devm_mipi_dsi_device_register_full);
+
static DEFINE_MUTEX(host_lock);
static LIST_HEAD(host_list);
diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h
index af7ba8071eb0..d0032e435e08 100644
--- a/include/drm/drm_mipi_dsi.h
+++ b/include/drm/drm_mipi_dsi.h
@@ -227,6 +227,9 @@ struct mipi_dsi_device *
mipi_dsi_device_register_full(struct mipi_dsi_host *host,
const struct mipi_dsi_device_info *info);
void mipi_dsi_device_unregister(struct mipi_dsi_device *dsi);
+struct mipi_dsi_device *
+devm_mipi_dsi_device_register_full(struct device *dev, struct mipi_dsi_host *host,
+ const struct mipi_dsi_device_info *info);
struct mipi_dsi_device *of_find_mipi_dsi_device_by_node(struct device_node *np);
int mipi_dsi_attach(struct mipi_dsi_device *dsi);
int mipi_dsi_detach(struct mipi_dsi_device *dsi);
--
2.31.1
next prev parent reply other threads:[~2021-08-23 8:49 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-23 8:47 [PATCH v3 0/8] drm/bridge: Make panel and bridge probe order consistent Maxime Ripard
2021-08-23 8:47 ` [PATCH v3 1/8] drm/bridge: Add documentation sections Maxime Ripard
2021-08-24 8:06 ` Andrzej Hajda
2021-08-23 8:47 ` [PATCH v3 2/8] drm/bridge: Document the probe issue with MIPI-DSI bridges Maxime Ripard
2021-08-23 16:32 ` Andrzej Hajda
2021-08-26 8:56 ` Maxime Ripard
2021-08-23 8:47 ` Maxime Ripard [this message]
2021-08-24 13:03 ` [PATCH v3 3/8] drm/mipi-dsi: Create devm device registration Andrzej Hajda
2021-08-23 8:47 ` [PATCH v3 4/8] drm/mipi-dsi: Create devm device attachment Maxime Ripard
2021-08-24 13:04 ` Andrzej Hajda
2021-08-23 8:47 ` [PATCH v3 5/8] drm/bridge: ps8640: Switch to devm MIPI-DSI helpers Maxime Ripard
2021-08-23 8:47 ` [PATCH v3 6/8] drm/bridge: ps8640: Register and attach our DSI device at probe Maxime Ripard
2021-08-24 13:14 ` Andrzej Hajda
2021-08-23 8:47 ` [PATCH v3 7/8] drm/bridge: sn65dsi83: Switch to devm MIPI-DSI helpers Maxime Ripard
2021-08-23 8:47 ` [PATCH v3 8/8] drm/bridge: sn65dsi83: Register and attach our DSI device at probe Maxime Ripard
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