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Commit ec47ff8f authored by Sandeep Panda's avatar Sandeep Panda
Browse files

msm: mdss: do not update panel backlight before commit 



This change ensures the enabling of panel backlight only
when the first frame is sent to panel during device resume.

Change-Id: I9006f93014a378cfbf10d54bca2ab262954333f0
Signed-off-by: default avatarSandeep Panda <spanda@codeaurora.org>
parent 4515d68c

drivers/video/msm/mdss/mdss_fb.c

+4 −16
Original line number Diff line number Diff line
@@ -2,7 +2,7 @@ 
 * Core MDSS framebuffer driver.

 *

 * Copyright (C) 2007 Google Incorporated

 * Copyright (c) 2008-2014, The Linux Foundation. All rights reserved.

 * Copyright (c) 2008-2015, The Linux Foundation. All rights reserved.

 *

 * This software is licensed under the terms of the GNU General Public

 * License version 2, as published by the Free Software Foundation, and
@@ -1103,13 +1103,13 @@ void mdss_fb_set_backlight(struct msm_fb_data_type *mfd, u32 bkl_lvl) 
		 * as well as setting bl_level to bkl_lvl even though the

		 * backlight has been set to the scaled value.

		 */

		if (mfd->bl_level_scaled == temp) {

		if (mfd->bl_level_old == temp) {

			mfd->bl_level = bkl_lvl;

		} else {

			pr_debug("backlight sent to panel :%d\n", temp);

			pdata->set_backlight(pdata, temp);

			mfd->bl_level = bkl_lvl;

			mfd->bl_level_scaled = temp;

			mfd->bl_level_old = temp;

			bl_notify_needed = true;

		}

		if (bl_notify_needed)
@@ -1145,7 +1145,7 @@ void mdss_fb_update_backlight(struct msm_fb_data_type *mfd) 
				}

			}

			pdata->set_backlight(pdata, temp);

			mfd->bl_level_scaled = mfd->unset_bl_level;

			mfd->bl_level_old = mfd->unset_bl_level;

			mfd->bl_updated = 1;

			mdss_fb_bl_update_notify(mfd);

		}
@@ -1221,17 +1221,6 @@ static int mdss_fb_unblank_sub(struct msm_fb_data_type *mfd) 
			schedule_delayed_work(&mfd->idle_notify_work,

				msecs_to_jiffies(mfd->idle_time));

	}



	/* Reset the backlight only if the panel was off */

	if (mdss_panel_is_power_off(cur_power_state)) {

		mutex_lock(&mfd->bl_lock);

		if (!mfd->bl_updated) {

			mfd->bl_updated = 1;

			mdss_fb_set_backlight(mfd, mfd->unset_bl_level);

		}

		mutex_unlock(&mfd->bl_lock);

	}



error:

	return ret;

}
@@ -1315,7 +1304,6 @@ static int mdss_fb_blank_sub(int blank_mode, struct fb_info *info, 
				/* Stop Display thread */

				if (mfd->disp_thread)

					mdss_fb_stop_disp_thread(mfd);

				mdss_fb_set_backlight(mfd, 0);

				mfd->bl_updated = 0;

			}

			mfd->panel_power_state = req_power_state;

drivers/video/msm/mdss/mdss_fb.h

+2 −2
Original line number Diff line number Diff line 
/* Copyright (c) 2008-2014, The Linux Foundation. All rights reserved.

/* Copyright (c) 2008-2015, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and
@@ -243,7 +243,7 @@ struct msm_fb_data_type { 
	u32 bl_min_lvl;

	u32 unset_bl_level;

	u32 bl_updated;

	u32 bl_level_scaled;

	u32 bl_level_old;

	struct mutex bl_lock;



	struct platform_device *pdev;