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

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

Change-Id: I5d00d666bfacddea58b824267eb0eb39b5b2641c
Signed-off-by: Vara Reddy <varar@codeaurora.org>
This commit is contained in:
Vara Reddy
2019-09-23 16:45:19 -07:00
parent b985d844b0
commit 4534e1912d
1 changed files with 29 additions and 10 deletions
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39
msm/dsi/dsi_pwr.c
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@@ -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 @@ error_disable_voltage:
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 @@ error:
(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;