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disp: msm: sde: fix failure in perf mode clk update through debugfs

Forráskód böngészése 
Setting perf tuning mode through debugfs during suspend can
result in underflow. Ensure that we are able to set rates,
or reset values and return to remain in normal mode.

Change-Id: Ib88de888690086d982b023b017083fee4e4d2091
Signed-off-by: Nilaan Gunabalachandran <ngunabal@codeaurora.org>
This commit is contained in:
Nilaan Gunabalachandran
2019-12-18 17:34:28 -05:00
committed by Gerrit - the friendly Code Review server
szülő c4f345dd75
commit 5bd891e4e2
1 fájl változott, egészen pontosan 8 új sor hozzáadva és 3 régi sor törölve
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11
msm/sde/sde_core_perf.c
Fájl megtekintése

@@ -879,7 +879,7 @@ void sde_core_perf_crtc_update(struct drm_crtc *crtc,
if ((params_changed && if ((params_changed &&
(new->core_clk_rate > old->core_clk_rate)) || (new->core_clk_rate > old->core_clk_rate)) ||
(!params_changed && (!params_changed && new->core_clk_rate &&
(new->core_clk_rate < old->core_clk_rate))) { (new->core_clk_rate < old->core_clk_rate))) {
old->core_clk_rate = new->core_clk_rate; old->core_clk_rate = new->core_clk_rate;
update_clk = 1; update_clk = 1;
@@ -1037,12 +1037,17 @@ static ssize_t _sde_core_perf_mode_write(struct file *file,
ret = sde_power_clk_set_rate(perf->phandle, ret = sde_power_clk_set_rate(perf->phandle,
perf->clk_name, perf->max_core_clk_rate); perf->clk_name, perf->max_core_clk_rate);
if (ret) if (ret) {
SDE_ERROR("failed to set %s clock rate %llu\n", SDE_ERROR("failed to set %s clock rate %llu\n",
perf->clk_name, perf->clk_name,
perf->max_core_clk_rate); perf->max_core_clk_rate);
else
perf->perf_tune.min_core_clk = 0;
perf->perf_tune.min_bus_vote = 0;
perf_mode = SDE_PERF_MODE_NORMAL;
} else {
DRM_INFO("minimum performance mode\n"); DRM_INFO("minimum performance mode\n");
}
SDE_EVT32(perf->max_core_clk_rate, ret); SDE_EVT32(perf->max_core_clk_rate, ret);
} else if (perf_mode == SDE_PERF_MODE_NORMAL) { } else if (perf_mode == SDE_PERF_MODE_NORMAL) {
/* reset the perf tune params to 0 */ /* reset the perf tune params to 0 */