diff options
| author | Tang Qijun <qijun.tang@ecs.corp-partner.google.com> | 2021-11-25 10:33:13 +0800 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2021-12-05 07:16:49 +0000 |
| commit | 142fdf278bae1092da44e6c5cba89acfed84aef7 (patch) | |
| tree | 0260815aada2325aab9d3e597c1da7b2c1d99aff | |
| parent | 5b7bc8baba35bc816c7dc94768d9fae05c7b78ec (diff) | |
| download | chrome-ec-142fdf278bae1092da44e6c5cba89acfed84aef7.tar.gz | |
pazquel: change panel blacklight PWM frequency to 20k
The noise is related to the LCD panel and brightness PWM.
Change the PWM frequency of the panel backlight to 20kHz,
the display is normal, and no noise can be heard.
BUG=b:207585489
BRANCH=trogdor
TEST=No noise can be heard when booting into the operating
system, and the screen display is normal.
Signed-off-by: Tang Qijun <qijun.tang@ecs.corp-partner.google.com>
Change-Id: I2ba8f7530743bbd1ee6f462be8f79c621eb3217a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3301560
Commit-Queue: Bob Moragues <moragues@chromium.org>
Tested-by: Bob Moragues <moragues@chromium.org>
Reviewed-by: Wai-Hong Tam <waihong@google.com>
Reviewed-by: Alexandru M Stan <amstan@chromium.org>
| -rw-r--r-- | board/pazquel/board.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/board/pazquel/board.c b/board/pazquel/board.c index 366167d7e6..8cab9ee887 100644 --- a/board/pazquel/board.c +++ b/board/pazquel/board.c @@ -218,9 +218,8 @@ const struct adc_t adc_channels[] = { BUILD_ASSERT(ARRAY_SIZE(adc_channels) == ADC_CH_COUNT); const struct pwm_t pwm_channels[] = { - [PWM_CH_KBLIGHT] = { .channel = 3, .flags = 0, .freq = 10000 }, - /* TODO(waihong): Assign a proper frequency. */ - [PWM_CH_DISPLIGHT] = { .channel = 5, .flags = 0, .freq = 4800 }, + [PWM_CH_KBLIGHT] = { .channel = 3, .flags = 0, .freq = 10000 }, + [PWM_CH_DISPLIGHT] = { .channel = 5, .flags = 0, .freq = 20000 }, }; BUILD_ASSERT(ARRAY_SIZE(pwm_channels) == PWM_CH_COUNT); |