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Commit 4534e191 authored by Vara Reddy's avatar Vara Reddy
Browse files

drm/msm/dsi-staging: use usleep_range instead of msleep in dsi enable 



Use usleep_range api instead of msleep in dsi enable path to
improve accuracy, which improves bootup time.

Change-Id: I5d00d666bfacddea58b824267eb0eb39b5b2641c
Signed-off-by: default avatarVara Reddy <varar@codeaurora.org>
parent b985d844

msm/dsi/dsi_pwr.c

+29 −10
Original line number Diff line number Diff line
@@ -126,12 +126,18 @@ static int dsi_pwr_enable_vregs(struct dsi_regulator_info *regs, bool enable) 
	int rc = 0, i = 0;

	struct dsi_vreg *vreg;

	int num_of_v = 0;

	u32 pre_on_ms, post_on_ms;

	u32 pre_off_ms, post_off_ms;



	if (enable) {

		for (i = 0; i < regs->count; i++) {

			vreg = &regs->vregs[i];

			pre_on_ms = vreg->pre_on_sleep;

			post_on_ms = vreg->post_on_sleep;



			if (vreg->pre_on_sleep)

				msleep(vreg->pre_on_sleep);

				usleep_range((pre_on_ms * 1000),

						(pre_on_ms * 1000) + 10);



			rc = regulator_set_load(vreg->vreg,

						vreg->enable_load);
@@ -160,12 +166,18 @@ static int dsi_pwr_enable_vregs(struct dsi_regulator_info *regs, bool enable) 
			}



			if (vreg->post_on_sleep)

				msleep(vreg->post_on_sleep);

				usleep_range((post_on_ms * 1000),

						(post_on_ms * 1000) + 10);

		}

	} else {

		for (i = (regs->count - 1); i >= 0; i--) {

			if (regs->vregs[i].pre_off_sleep)

				msleep(regs->vregs[i].pre_off_sleep);

			vreg = &regs->vregs[i];

			pre_off_ms = vreg->pre_off_sleep;

			post_off_ms = vreg->post_off_sleep;



			if (pre_off_ms)

				usleep_range((pre_off_ms * 1000),

						(pre_off_ms * 1000) + 10);



			if (regs->vregs[i].off_min_voltage)

				(void)regulator_set_voltage(regs->vregs[i].vreg,
@@ -176,8 +188,9 @@ static int dsi_pwr_enable_vregs(struct dsi_regulator_info *regs, bool enable) 
						regs->vregs[i].disable_load);

			(void)regulator_disable(regs->vregs[i].vreg);



			if (regs->vregs[i].post_off_sleep)

				msleep(regs->vregs[i].post_off_sleep);

			if (post_off_ms)

				usleep_range((post_off_ms * 1000),

						(post_off_ms * 1000) + 10);

		}

	}
@@ -192,8 +205,13 @@ static int dsi_pwr_enable_vregs(struct dsi_regulator_info *regs, bool enable) 
					    0, regs->vregs[i].max_voltage);

error:

	for (i--; i >= 0; i--) {

		if (regs->vregs[i].pre_off_sleep)

			msleep(regs->vregs[i].pre_off_sleep);

		vreg = &regs->vregs[i];

		pre_off_ms = vreg->pre_off_sleep;

		post_off_ms = vreg->post_off_sleep;



		if (pre_off_ms)

			usleep_range((pre_off_ms * 1000),

					(pre_off_ms * 1000) + 10);



		(void)regulator_set_load(regs->vregs[i].vreg,

					 regs->vregs[i].disable_load);
@@ -205,8 +223,9 @@ static int dsi_pwr_enable_vregs(struct dsi_regulator_info *regs, bool enable) 


		(void)regulator_disable(regs->vregs[i].vreg);



		if (regs->vregs[i].post_off_sleep)

			msleep(regs->vregs[i].post_off_sleep);

		if (post_off_ms)

			usleep_range((post_off_ms * 1000),

					(post_off_ms * 1000) + 10);

	}



	return rc;