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Commit f86e722e authored by Jeykumar Sankaran's avatar Jeykumar Sankaran
Browse files

disp: msm: sde: control backlight update for trusted UI 



Install backlight property only for primary VM and avoid
backlight updates when HW is not owned by the VM.

Change-Id: I35f26d5c41ea57c7271382a1fe571e65ee4520c1
Signed-off-by: default avatarJeykumar Sankaran <jsanka@codeaurora.org>
parent 6b74335f

msm/sde/sde_connector.c

+34 −1
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
#include "dsi_display.h"

#include "sde_crtc.h"

#include "sde_rm.h"

#include "sde_vm.h"

#include <drm/drm_probe_helper.h>



#define BL_NODE_NAME_SIZE 32
@@ -79,6 +80,8 @@ static int sde_backlight_device_update_status(struct backlight_device *bd) 
	int bl_lvl;

	struct drm_event event;

	int rc = 0;

	struct msm_drm_private *priv;

	struct sde_kms *sde_kms;



	brightness = bd->props.brightness;
@@ -88,6 +91,10 @@ static int sde_backlight_device_update_status(struct backlight_device *bd) 
		brightness = 0;



	c_conn = bl_get_data(bd);



	priv = c_conn->base.dev->dev_private;

	sde_kms = to_sde_kms(priv->kms);



	display = (struct dsi_display *) c_conn->display;

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

		brightness = display->panel->bl_config.bl_max_level;
@@ -106,6 +113,19 @@ static int sde_backlight_device_update_status(struct backlight_device *bd) 
		return 0;

	}



	if (sde_kms->vm) {

		struct sde_vm_ops *vm_ops = &sde_kms->vm->vm_ops;



		mutex_lock(&sde_kms->vm->vm_res_lock);



		if (vm_ops->vm_owns_hw && !vm_ops->vm_owns_hw(sde_kms)) {

			SDE_DEBUG(

				"skipping bl update due to HW unavailablity\n");

			mutex_unlock(&sde_kms->vm->vm_res_lock);

			return 0;

		}

	}



	if (c_conn->ops.set_backlight) {

		/* skip notifying user space if bl is 0 */

		if (brightness != 0) {
@@ -119,6 +139,9 @@ static int sde_backlight_device_update_status(struct backlight_device *bd) 
		c_conn->unset_bl_level = 0;

	}



	if (sde_kms->vm)

		mutex_unlock(&sde_kms->vm->vm_res_lock);



	return rc;

}
@@ -152,16 +175,26 @@ static int sde_backlight_setup(struct sde_connector *c_conn, 
	struct backlight_properties props;

	struct dsi_display *display;

	struct dsi_backlight_config *bl_config;

	struct msm_drm_private *priv;

	struct sde_kms *sde_kms;

	static int display_count;

	char bl_node_name[BL_NODE_NAME_SIZE];



	if (!c_conn || !dev || !dev->dev) {

	if (!c_conn || !dev || !dev->dev || !dev->dev_private) {

		SDE_ERROR("invalid param\n");

		return -EINVAL;

	} else if (c_conn->connector_type != DRM_MODE_CONNECTOR_DSI) {

		return 0;

	}



	priv = dev->dev_private;

	if (!priv->kms)

		return -EINVAL;



	sde_kms = to_sde_kms(priv->kms);

	if (sde_in_trusted_vm(sde_kms))

		return 0;



	memset(&props, 0, sizeof(props));

	props.type = BACKLIGHT_RAW;

	props.power = FB_BLANK_UNBLANK;