evie/android_kernel_oneplus_msm8998
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msm: mdss: Fix AD calibration mode resume backlight issue

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AD when set in calibration mode will block all backlight
updates from frameworks. Hence during suspend/blank the
backlight would not be 0 but will be set to the value
set in calibration mode.

Now this is changed as during suspend the backlight is
set to 0 within driver itself. This complicates things by
causing backlight to remain 0 post resume in calibration
mode. Now changing the behavior so that backlight is set
to 0 during suspend and set to the calibration set value
upon resume.

Change-Id: Id0b3919a7034875b3f3a606d00f462ceb21f40ee
Signed-off-by: Krishna Chaitanya Parimi <cparimi@codeaurora.org>
This commit is contained in:
Krishna Chaitanya Parimi 2015-01-09 15:09:59 +05:30 • committed by David Keitel
parent 8f293cab86
commit f954efe130
3 changed files with 13 additions and 1 deletions
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12
drivers/video/fbdev/msm/mdss_fb.c
View file

@ -858,6 +858,7 @@ static int mdss_fb_probe(struct platform_device *pdev)
mfd->bl_min_lvl = 30;
mfd->ad_bl_level = 0;
mfd->fb_imgType = MDP_RGBA_8888;
mfd->calib_mode_bl = 0;
mfd->pdev = pdev;
@ -1473,7 +1474,16 @@ static int mdss_fb_blank_unblank(struct msm_fb_data_type *mfd)
mutex_lock(&mfd->bl_lock);
if (!mfd->bl_updated) {
mfd->bl_updated = 1;
mdss_fb_set_backlight(mfd, mfd->unset_bl_level);
/*
* If in AD calibration mode then frameworks would not
* be allowed to update backlight hence post unblank
* the backlight would remain 0 (0 is set in blank).
* Hence resetting back to calibration mode value
*/
if (!IS_CALIB_MODE_BL(mfd))
mdss_fb_set_backlight(mfd, mfd->unset_bl_level);
else
mdss_fb_set_backlight(mfd, mfd->calib_mode_bl);
}
mutex_unlock(&mfd->bl_lock);
}

1
drivers/video/fbdev/msm/mdss_fb.h
View file

@ -286,6 +286,7 @@ struct msm_fb_data_type {
int ext_ad_ctrl;
u32 ext_bl_ctrl;
u32 calib_mode;
u32 calib_mode_bl;
u32 ad_bl_level;
u32 bl_level;
u32 bl_scale;

1
drivers/video/fbdev/msm/mdss_mdp_pp.c
View file

@ -4942,6 +4942,7 @@ int mdss_mdp_ad_input(struct msm_fb_data_type *mfd,
mdss_fb_set_backlight(mfd, bl);
mutex_unlock(&mfd->bl_lock);
mutex_lock(&ad->lock);
mfd->calib_mode_bl = bl;
} else {
pr_warn("should be in calib mode\n");
}