From: Archit Taneja <architt@codeaurora.org> To: dri-devel@lists.freedesktop.org, a.hajda@samsung.com Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, treding@nvidia.com Subject: [PATCH v3 5/5] drm/dsi: Get DSI host by DT device node Date: Mon, 30 Nov 2015 17:31:32 +0530 [thread overview] Message-ID: <1448884892-7731-6-git-send-email-architt@codeaurora.org> (raw) In-Reply-To: <1448884892-7731-1-git-send-email-architt@codeaurora.org> mipi_dsi_devices are inherently aware of their host because they share a parent-child hierarchy in the device tree. non-dsi drivers that create dsi device don't have this data. In order to get this information, they require to a phandle to the dsi host in the device tree. Maintain a list of all the hosts DSI that are currently registered. This list will be used to find the mipi_dsi_host corresponding to the device_node passed in of_find_mipi_dsi_host_by_node. Reviewed-by: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Archit Taneja <architt@codeaurora.org> --- drivers/gpu/drm/drm_mipi_dsi.c | 38 ++++++++++++++++++++++++++++++++++++++ include/drm/drm_mipi_dsi.h | 3 +++ 2 files changed, 41 insertions(+) diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c index f73e434..e9c17e25 100644 --- a/drivers/gpu/drm/drm_mipi_dsi.c +++ b/drivers/gpu/drm/drm_mipi_dsi.c @@ -205,6 +205,36 @@ of_mipi_dsi_device_add(struct mipi_dsi_host *host, struct device_node *node) return mipi_dsi_device_new(host, &info); } +static DEFINE_MUTEX(host_lock); +static LIST_HEAD(host_list); + +/** + * of_find_mipi_dsi_host_by_node() - find the MIPI DSI host matching a + * device tree node + * @node: device tree node + * + * Return: A pointer to the MIPI DSI host corresponding to @np or NULL if no + * such device exists (or has not been registered yet). + */ +struct mipi_dsi_host *of_find_mipi_dsi_host_by_node(struct device_node *node) +{ + struct mipi_dsi_host *host; + + mutex_lock(&host_lock); + + list_for_each_entry(host, &host_list, list) { + if (host->dev->of_node == node) { + mutex_unlock(&host_lock); + return host; + } + } + + mutex_unlock(&host_lock); + + return NULL; +} +EXPORT_SYMBOL(of_find_mipi_dsi_host_by_node); + int mipi_dsi_host_register(struct mipi_dsi_host *host) { struct device_node *node; @@ -216,6 +246,10 @@ int mipi_dsi_host_register(struct mipi_dsi_host *host) of_mipi_dsi_device_add(host, node); } + mutex_lock(&host_lock); + list_add_tail(&host->list, &host_list); + mutex_unlock(&host_lock); + return 0; } EXPORT_SYMBOL(mipi_dsi_host_register); @@ -232,6 +266,10 @@ static int mipi_dsi_remove_device_fn(struct device *dev, void *priv) void mipi_dsi_host_unregister(struct mipi_dsi_host *host) { device_for_each_child(host->dev, NULL, mipi_dsi_remove_device_fn); + + mutex_lock(&host_lock); + list_del_init(&host->list); + mutex_unlock(&host_lock); } EXPORT_SYMBOL(mipi_dsi_host_unregister); diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h index 410d8b5..e5c1df9 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -96,14 +96,17 @@ struct mipi_dsi_host_ops { * struct mipi_dsi_host - DSI host device * @dev: driver model device node for this DSI host * @ops: DSI host operations + * @list: list management */ struct mipi_dsi_host { struct device *dev; const struct mipi_dsi_host_ops *ops; + struct list_head list; }; int mipi_dsi_host_register(struct mipi_dsi_host *host); void mipi_dsi_host_unregister(struct mipi_dsi_host *host); +struct mipi_dsi_host *of_find_mipi_dsi_host_by_node(struct device_node *node); /* DSI mode flags */ -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, hosted by The Linux Foundation _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/dri-devel
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From: Archit Taneja <architt@codeaurora.org> To: dri-devel@lists.freedesktop.org, a.hajda@samsung.com Cc: linux-kernel@vger.kernel.org, airlied@linux.ie, daniel@ffwll.ch, treding@nvidia.com, l.stach@pengutronix.de, robh@kernel.org, linux-arm-msm@vger.kernel.org, jani.nikula@linux.intel.com, Archit Taneja <architt@codeaurora.org> Subject: [PATCH v3 5/5] drm/dsi: Get DSI host by DT device node Date: Mon, 30 Nov 2015 17:31:32 +0530 [thread overview] Message-ID: <1448884892-7731-6-git-send-email-architt@codeaurora.org> (raw) In-Reply-To: <1448884892-7731-1-git-send-email-architt@codeaurora.org> mipi_dsi_devices are inherently aware of their host because they share a parent-child hierarchy in the device tree. non-dsi drivers that create dsi device don't have this data. In order to get this information, they require to a phandle to the dsi host in the device tree. Maintain a list of all the hosts DSI that are currently registered. This list will be used to find the mipi_dsi_host corresponding to the device_node passed in of_find_mipi_dsi_host_by_node. Reviewed-by: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Archit Taneja <architt@codeaurora.org> --- drivers/gpu/drm/drm_mipi_dsi.c | 38 ++++++++++++++++++++++++++++++++++++++ include/drm/drm_mipi_dsi.h | 3 +++ 2 files changed, 41 insertions(+) diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c index f73e434..e9c17e25 100644 --- a/drivers/gpu/drm/drm_mipi_dsi.c +++ b/drivers/gpu/drm/drm_mipi_dsi.c @@ -205,6 +205,36 @@ of_mipi_dsi_device_add(struct mipi_dsi_host *host, struct device_node *node) return mipi_dsi_device_new(host, &info); } +static DEFINE_MUTEX(host_lock); +static LIST_HEAD(host_list); + +/** + * of_find_mipi_dsi_host_by_node() - find the MIPI DSI host matching a + * device tree node + * @node: device tree node + * + * Return: A pointer to the MIPI DSI host corresponding to @np or NULL if no + * such device exists (or has not been registered yet). + */ +struct mipi_dsi_host *of_find_mipi_dsi_host_by_node(struct device_node *node) +{ + struct mipi_dsi_host *host; + + mutex_lock(&host_lock); + + list_for_each_entry(host, &host_list, list) { + if (host->dev->of_node == node) { + mutex_unlock(&host_lock); + return host; + } + } + + mutex_unlock(&host_lock); + + return NULL; +} +EXPORT_SYMBOL(of_find_mipi_dsi_host_by_node); + int mipi_dsi_host_register(struct mipi_dsi_host *host) { struct device_node *node; @@ -216,6 +246,10 @@ int mipi_dsi_host_register(struct mipi_dsi_host *host) of_mipi_dsi_device_add(host, node); } + mutex_lock(&host_lock); + list_add_tail(&host->list, &host_list); + mutex_unlock(&host_lock); + return 0; } EXPORT_SYMBOL(mipi_dsi_host_register); @@ -232,6 +266,10 @@ static int mipi_dsi_remove_device_fn(struct device *dev, void *priv) void mipi_dsi_host_unregister(struct mipi_dsi_host *host) { device_for_each_child(host->dev, NULL, mipi_dsi_remove_device_fn); + + mutex_lock(&host_lock); + list_del_init(&host->list); + mutex_unlock(&host_lock); } EXPORT_SYMBOL(mipi_dsi_host_unregister); diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h index 410d8b5..e5c1df9 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -96,14 +96,17 @@ struct mipi_dsi_host_ops { * struct mipi_dsi_host - DSI host device * @dev: driver model device node for this DSI host * @ops: DSI host operations + * @list: list management */ struct mipi_dsi_host { struct device *dev; const struct mipi_dsi_host_ops *ops; + struct list_head list; }; int mipi_dsi_host_register(struct mipi_dsi_host *host); void mipi_dsi_host_unregister(struct mipi_dsi_host *host); +struct mipi_dsi_host *of_find_mipi_dsi_host_by_node(struct device_node *node); /* DSI mode flags */ -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, hosted by The Linux Foundation
next prev parent reply other threads:[~2015-11-30 12:01 UTC|newest] Thread overview: 144+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-06-30 5:24 [RFC 0/2] drm/dsi: DSI for devices with different control bus Archit Taneja 2015-06-30 5:24 ` [RFC 1/2] drm/dsi: Create dummy DSI devices Archit Taneja 2015-06-30 5:24 ` Archit Taneja 2015-08-19 8:10 ` Andrzej Hajda 2015-08-19 8:10 ` Andrzej Hajda 2015-08-19 9:30 ` Archit Taneja 2015-06-30 5:24 ` [RFC 2/2] drm/dsi: Get DSI host by DT device node Archit Taneja 2015-06-30 5:24 ` Archit Taneja 2015-08-19 8:46 ` Andrzej Hajda 2015-08-19 8:46 ` Andrzej Hajda 2015-08-19 5:07 ` [RFC 0/2] drm/dsi: DSI for devices with different control bus Archit Taneja 2015-08-19 13:13 ` Thierry Reding 2015-08-19 13:13 ` Thierry Reding 2015-08-19 14:17 ` Lucas Stach 2015-08-19 14:34 ` Thierry Reding 2015-08-19 14:34 ` Thierry Reding 2015-08-19 14:52 ` Lucas Stach 2015-08-19 14:52 ` Lucas Stach 2015-08-19 15:02 ` Thierry Reding 2015-08-19 15:02 ` Thierry Reding 2015-08-19 15:39 ` Jani Nikula 2015-08-20 4:16 ` Archit Taneja 2015-08-20 11:48 ` Thierry Reding 2015-08-20 11:48 ` Thierry Reding 2015-08-21 6:09 ` Archit Taneja 2015-08-21 6:09 ` Archit Taneja 2015-09-07 11:46 ` Archit Taneja 2015-09-07 11:46 ` Archit Taneja 2015-09-08 10:27 ` Andrzej Hajda 2015-09-10 6:15 ` Archit Taneja 2015-09-10 6:15 ` Archit Taneja 2015-09-10 7:32 ` Thierry Reding 2015-09-10 7:32 ` Thierry Reding 2015-09-15 10:32 ` Archit Taneja 2015-09-15 10:32 ` Archit Taneja 2015-09-15 15:43 ` Rob Herring 2015-09-17 8:56 ` Archit Taneja 2015-09-15 10:41 ` Archit Taneja 2015-09-15 10:41 ` Archit Taneja 2015-10-06 9:24 ` [RFC v2 0/5] " Archit Taneja 2015-10-06 9:24 ` [RFC v2 1/5] drm/dsi: Refactor device creation Archit Taneja 2015-10-06 9:24 ` Archit Taneja 2015-10-30 11:28 ` Andrzej Hajda 2015-10-30 11:28 ` Andrzej Hajda 2015-10-06 9:24 ` [RFC v2 2/5] drm/dsi: Try to match non-DT dsi devices Archit Taneja 2015-10-06 9:24 ` Archit Taneja 2015-10-30 12:42 ` Andrzej Hajda 2015-10-30 12:42 ` Andrzej Hajda 2015-11-02 5:26 ` Archit Taneja 2015-11-02 5:26 ` Archit Taneja 2015-10-06 9:24 ` [RFC v2 3/5] drm/dsi: Check for used channels Archit Taneja 2015-10-06 9:24 ` Archit Taneja 2015-10-30 12:52 ` Andrzej Hajda 2015-11-02 5:28 ` Archit Taneja 2015-11-02 5:28 ` Archit Taneja 2015-10-06 9:24 ` [RFC v2 4/5] drm/dsi: Add routine to unregister dsi device Archit Taneja 2015-10-06 9:24 ` Archit Taneja 2015-10-30 14:21 ` Andrzej Hajda 2015-10-30 14:21 ` Andrzej Hajda 2015-11-02 6:28 ` Archit Taneja 2015-11-02 10:42 ` Andrzej Hajda 2015-11-03 7:18 ` Archit Taneja 2015-10-06 9:24 ` [RFC v2 5/5] drm/dsi: Get DSI host by DT device node Archit Taneja 2015-10-06 9:24 ` Archit Taneja 2015-10-06 10:00 ` kbuild test robot 2015-10-06 10:00 ` kbuild test robot 2015-11-02 10:50 ` Andrzej Hajda 2015-11-02 10:50 ` Andrzej Hajda 2015-11-03 7:20 ` Archit Taneja 2015-11-03 7:20 ` Archit Taneja 2015-11-30 12:01 ` [PATCH v3 0/5] drm/dsi: DSI for devices with different control bus Archit Taneja 2015-11-30 12:01 ` [PATCH v3 1/5] drm/dsi: Refactor device creation Archit Taneja 2015-11-30 12:01 ` Archit Taneja 2015-11-30 12:01 ` [PATCH v3 2/5] drm/dsi: Try to match non-DT dsi devices Archit Taneja 2015-11-30 12:01 ` Archit Taneja 2015-11-30 12:45 ` kbuild test robot 2015-11-30 12:45 ` kbuild test robot 2015-12-07 5:29 ` Archit Taneja 2015-12-07 8:45 ` Jani Nikula 2015-12-07 8:59 ` Archit Taneja 2015-12-07 8:59 ` Archit Taneja 2015-12-07 9:10 ` Jani Nikula 2015-12-07 9:10 ` Jani Nikula 2015-12-07 9:18 ` Archit Taneja 2015-12-07 10:07 ` Jani Nikula 2015-12-07 16:55 ` Rob Clark 2015-11-30 12:01 ` [PATCH v3 3/5] drm/dsi: Check for used channels Archit Taneja 2015-11-30 12:01 ` Archit Taneja 2015-11-30 12:01 ` [PATCH v3 4/5] drm/dsi: Add routine to unregister dsi device Archit Taneja 2015-11-30 12:01 ` Archit Taneja 2015-11-30 12:34 ` Andrzej Hajda 2015-11-30 12:34 ` Andrzej Hajda 2015-11-30 12:01 ` Archit Taneja [this message] 2015-11-30 12:01 ` [PATCH v3 5/5] drm/dsi: Get DSI host by DT device node Archit Taneja 2015-12-10 12:41 ` [PATCH v4 0/6] drm/dsi: DSI for devices with different control bus Archit Taneja 2015-12-10 12:41 ` [PATCH v4 1/6] drm/dsi: check for CONFIG_OF when defining of_mipi_dsi_device_add Archit Taneja 2015-12-10 12:41 ` Archit Taneja 2016-01-21 15:31 ` Thierry Reding 2016-01-21 15:31 ` Thierry Reding 2016-01-26 14:59 ` Archit Taneja 2016-01-26 14:59 ` Archit Taneja 2015-12-10 12:41 ` [PATCH v4 2/6] drm/dsi: Refactor device creation Archit Taneja 2016-01-21 15:46 ` Thierry Reding 2016-01-21 15:46 ` Thierry Reding 2016-01-26 17:05 ` Archit Taneja 2016-01-26 17:05 ` Archit Taneja 2015-12-10 12:41 ` [PATCH v4 3/6] drm/dsi: Try to match non-DT dsi devices Archit Taneja 2015-12-10 12:41 ` Archit Taneja 2016-01-21 16:05 ` Thierry Reding 2016-01-21 16:05 ` Thierry Reding 2016-01-26 18:04 ` Archit Taneja 2016-01-26 18:04 ` Archit Taneja 2015-12-10 12:41 ` [PATCH v4 4/6] drm/dsi: Check for used channels Archit Taneja 2015-12-10 12:41 ` Archit Taneja 2016-01-21 16:11 ` Thierry Reding 2016-01-21 16:11 ` Thierry Reding 2016-01-27 5:16 ` Archit Taneja 2016-01-27 5:16 ` Archit Taneja 2015-12-10 12:41 ` [PATCH v4 5/6] drm/dsi: Add routine to unregister dsi device Archit Taneja 2015-12-10 12:41 ` Archit Taneja 2016-01-21 16:12 ` Thierry Reding 2016-01-21 16:12 ` Thierry Reding 2016-01-27 5:20 ` Archit Taneja 2015-12-10 12:41 ` [PATCH v4 6/6] drm/dsi: Get DSI host by DT device node Archit Taneja 2015-12-10 12:41 ` Archit Taneja 2016-01-21 16:16 ` Thierry Reding 2016-01-21 16:16 ` Thierry Reding 2016-01-27 5:21 ` Archit Taneja 2016-01-27 5:21 ` Archit Taneja 2016-01-05 5:29 ` [PATCH v4 0/6] drm/dsi: DSI for devices with different control bus Archit Taneja 2016-02-12 9:18 ` [PATCH v5 0/5] " Archit Taneja 2016-02-12 9:18 ` Archit Taneja 2016-02-12 9:18 ` [PATCH v5 1/5] drm/dsi: check for CONFIG_OF when defining of_mipi_dsi_device_add Archit Taneja 2016-02-12 9:18 ` Archit Taneja 2016-02-12 9:18 ` [PATCH v5 2/5] drm/dsi: Use mipi_dsi_device_register_full for DSI device creation Archit Taneja 2016-02-12 9:18 ` Archit Taneja 2016-02-12 9:18 ` [PATCH v5 3/5] drm/dsi: Try to match non-DT DSI devices Archit Taneja 2016-02-12 9:18 ` Archit Taneja 2016-02-12 9:18 ` [PATCH v5 4/5] drm/dsi: Add routine to unregister a DSI device Archit Taneja 2016-02-12 9:18 ` Archit Taneja 2016-02-12 9:18 ` [PATCH v5 5/5] drm/dsi: Get DSI host by DT device node Archit Taneja 2016-02-12 9:18 ` Archit Taneja 2016-03-02 16:05 ` [PATCH v5 0/5] drm/dsi: DSI for devices with different control bus Thierry Reding 2016-03-02 16:05 ` Thierry Reding
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