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Commit 53654b53 authored by Ram Chandrasekar's avatar Ram Chandrasekar Committed by Gerrit - the friendly Code Review server
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disp: msm: sde: Register display brightness cooling device 



Register for getting a blocking notified call when the display cooling
device mitigates. Update the current brightness to the thermally allowed
level.

Change-Id: I20945a20751646e6d9bbf8bb7e7039c6ce43c306
Signed-off-by: default avatarRam Chandrasekar <rkumbako@codeaurora.org>
parent 132fd394

msm/sde/sde_connector.c

+30 −0
Original line number Diff line number Diff line
@@ -10,6 +10,7 @@ 
#include "sde_kms.h"

#include "sde_connector.h"

#include "sde_encoder.h"

#include "msm_cooling_device.h"

#include <linux/backlight.h>

#include <linux/string.h>

#include "dsi_drm.h"
@@ -90,6 +91,8 @@ static int sde_backlight_device_update_status(struct backlight_device *bd) 
	display = (struct dsi_display *) c_conn->display;

	if (brightness > display->panel->bl_config.bl_max_level)

		brightness = display->panel->bl_config.bl_max_level;

	if (brightness > c_conn->thermal_max_brightness)

		brightness = c_conn->thermal_max_brightness;



	/* map UI brightness into driver backlight level with rounding */

	bl_lvl = mult_frac(brightness, display->panel->bl_config.bl_max_level,
@@ -129,6 +132,20 @@ static const struct backlight_ops sde_backlight_device_ops = { 
	.get_brightness = sde_backlight_device_get_brightness,

};



static int sde_backlight_cooling_cb(struct notifier_block *nb,

					unsigned long val, void *data)

{

	struct sde_connector *c_conn;

	struct backlight_device *bd = (struct backlight_device *)data;



	c_conn = bl_get_data(bd);

	SDE_DEBUG("bl: thermal max brightness cap:%lu\n", val);

	c_conn->thermal_max_brightness = val;



	sde_backlight_device_update_status(bd);

	return 0;

}



static int sde_backlight_setup(struct sde_connector *c_conn,

					struct drm_device *dev)

{
@@ -163,6 +180,17 @@ static int sde_backlight_setup(struct sde_connector *c_conn, 
		c_conn->bl_device = NULL;

		return -ENODEV;

	}

	c_conn->thermal_max_brightness = bl_config->brightness_max_level;

	c_conn->n.notifier_call = sde_backlight_cooling_cb;

	c_conn->cdev = backlight_cdev_register(dev->dev, c_conn->bl_device,

							&c_conn->n);

	if (IS_ERR_OR_NULL(c_conn->cdev)) {

		SDE_ERROR("Failed to register backlight cdev: %ld\n",

				    PTR_ERR(c_conn->cdev));

		backlight_device_unregister(c_conn->bl_device);

		c_conn->bl_device = NULL;

		return -ENODEV;

	}

	display_count++;



	return 0;
@@ -945,6 +973,8 @@ void sde_connector_destroy(struct drm_connector *connector) 
	if (c_conn->blob_ext_hdr)

		drm_property_blob_put(c_conn->blob_ext_hdr);



	if (c_conn->cdev)

		backlight_cdev_unregister(c_conn->cdev);

	if (c_conn->bl_device)

		backlight_device_unregister(c_conn->bl_device);

	drm_connector_unregister(connector);

msm/sde/sde_connector.h

+6 −0
Original line number Diff line number Diff line
@@ -412,6 +412,9 @@ struct sde_connector_dyn_hdr_metadata { 
 * @event_table: Array of registered events

 * @event_lock: Lock object for event_table

 * @bl_device: backlight device node

 * @cdev: backlight cooling device interface

 * @n: backlight cooling device notifier

 * @thermal_max_brightness: thermal max brightness cap

 * @status_work: work object to perform status checks

 * @esd_status_interval: variable to change ESD check interval in millisec

 * @panel_dead: Flag to indicate if panel has gone bad
@@ -470,6 +473,9 @@ struct sde_connector { 
	spinlock_t event_lock;



	struct backlight_device *bl_device;

	struct sde_cdev *cdev;

	struct notifier_block n;

	unsigned long thermal_max_brightness;

	struct delayed_work status_work;

	u32 esd_status_interval;

	bool panel_dead;