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backlight: qcom-spmi-wled: Update CABC disable sequence for PM7325B WLED

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Update CABC disable sequence for PM7325B WLED to improve low
dimming flicker.

Change-Id: Iba55f17c16f35c084477f5871fe2acd265a913fb
Signed-off-by: Jishnu Prakash <jprakash@codeaurora.org>
This commit is contained in:
Jishnu Prakash 2021-05-07 14:44:17 +05:30
commit 5441b6ac89
1 changed files with 21 additions and 1 deletions
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22
drivers/video/backlight/qcom-spmi-wled.c
View file

@ -147,6 +147,9 @@
#define WLED5_SINK_MOD_B_BRT_LSB_REG 0x63
#define WLED5_SINK_MOD_B_BRT_MSB_REG 0x64
#define WLED5_SINK_CABC_STRETCH_CTL_REG 0x57
#define WLED5_SINK_EN_CABC_STRETCH BIT(7)
#define WLED5_SINK_MOD_SYNC_BIT_REG 0x65
#define WLED5_SINK_SYNC_MODA_BIT BIT(0)
#define WLED5_SINK_SYNC_MODB_BIT BIT(1)
@ -185,6 +188,9 @@
#define WLED5_EN_EXP_LUT BIT(6)
#define WLED5_SLEW_RAMP_TIME_SEL GENMASK(3, 0)
#define WLED5_SINK_DIG_HYS_FILT_REG 0xbc
#define WLED5_SINK_LSB_NOISE_THRESH GENMASK(2, 0)
#define WLED5_SINK_DIMMING_EXP_LUT0_LSB_REG 0xc0
#define WLED5_SINK_DIMMING_EXP_LUT0_MSB_REG 0xc1
#define WLED5_SINK_DIMMING_EXP_LUT1_LSB_REG 0xc2
@ -683,8 +689,22 @@ static int wled5_cabc_config(struct wled *wled, bool enable)
return rc;
}
if (!wled->cfg.cabc_sel)
if (!wled->cfg.cabc_sel) {
wled->cabc_disabled = true;
if (*wled->version == WLED_PM7325B) {
rc = regmap_update_bits(wled->regmap,
wled->sink_addr + WLED5_SINK_CABC_STRETCH_CTL_REG,
WLED5_SINK_EN_CABC_STRETCH, 0);
if (rc < 0)
return rc;
rc = regmap_update_bits(wled->regmap,
wled->sink_addr + WLED5_SINK_DIG_HYS_FILT_REG,
WLED5_SINK_LSB_NOISE_THRESH, 0);
if (rc < 0)
return rc;
}
}
return 0;
}