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Commit 66e12d4d authored by Ping Li's avatar Ping Li
Browse files

msm: mdss: Add backlight threshold for AD 



Notify user space with only backlight changes that pass the backlight
threshold check.

Change-Id: Id2fef0a2d9c883d0e68a5ad6be699858be6898ae
Signed-off-by: default avatarPing Li <pingli@codeaurora.org>
parent 2ae35ef6

drivers/video/msm/mdss/mdss_mdp_pp.c

+25 −4
Original line number Diff line number Diff line
@@ -2460,6 +2460,26 @@ int mdss_mdp_pp_default_overlay_config(struct msm_fb_data_type *mfd, 
	return ret;

}



static bool pp_ad_bl_threshold_check(int al_thresh, int base, int prev_bl,

					 int curr_bl)

{

	int bl_thresh = 0, diff = 0;

	bool ret = false;



	pr_debug("al_thresh = %d, base = %d\n", al_thresh, base);

	if (base <= 0) {

		pr_debug("Invalid base for threshold calculation %d\n", base);

		return ret;

	}

	bl_thresh = (curr_bl * al_thresh) / (base * 4);

	diff = (curr_bl > prev_bl) ? (curr_bl - prev_bl) : (prev_bl - curr_bl);

	ret = (diff > bl_thresh) ? true : false;

	pr_debug("prev_bl =%d, curr_bl = %d, bl_thresh = %d, diff = %d, ret = %d\n",

		prev_bl, curr_bl, bl_thresh, diff, ret);



	return ret;

}



static int pp_ad_calc_bl(struct msm_fb_data_type *mfd, int bl_in, int *bl_out,

	bool *bl_out_notify)

{
@@ -2520,15 +2540,16 @@ static int pp_ad_calc_bl(struct msm_fb_data_type *mfd, int bl_in, int *bl_out, 
		mutex_unlock(&ad->lock);

		return ret;

	}

	*bl_out = temp;



	if (ad_bl_out != mfd->ad_bl_level) {

	*bl_out = temp;

	if (pp_ad_bl_threshold_check(ad->init.al_thresh, ad->init.alpha_base,

					mfd->ad_bl_level, ad_bl_out)) {

		mfd->ad_bl_level = ad_bl_out;

		pr_debug("backlight send to AD block: %d\n", mfd->ad_bl_level);

		*bl_out_notify = true;

		pp_ad_invalidate_input(mfd);

	}



	if (*bl_out_notify)

		pp_ad_invalidate_input(mfd);

	mutex_unlock(&ad->lock);

	return 0;

}

include/uapi/linux/msm_mdp.h

+1 −0
Original line number Diff line number Diff line
@@ -1082,6 +1082,7 @@ struct mdss_ad_init { 
	uint8_t logo_h;

	uint32_t alpha;

	uint32_t alpha_base;

	uint32_t al_thresh;

	uint32_t bl_lin_len;

	uint32_t bl_att_len;

	uint32_t *bl_lin;