| Message ID | 1616071180-24493-3-git-send-email-kgunda@codeaurora.org (mailing list archive) |
|---|---|
| State | Superseded, archived |
| Headers | show |
| Series | [V5,1/2] backlight: qcom-wled: Fix FSC update issue for WLED5 | expand |
On Thu, 18 Mar 2021, Kiran Gunda wrote: > As per the current implementation, after FSC (Full Scale Current) > and brightness update the sync bits are set-then-cleared. > But, the FSC and brightness sync takes place when the sync bits are > set (e.g. on a rising edge). So the hardware team recommends a > clear-then-set approach in order to guarantee such a transition > regardless of the previous register state. > > Signed-off-by: Kiran Gunda <kgunda@codeaurora.org> > Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> > --- > drivers/video/backlight/qcom-wled.c | 12 ++++++------ > 1 file changed, 6 insertions(+), 6 deletions(-) Applied, thanks.
diff --git a/drivers/video/backlight/qcom-wled.c b/drivers/video/backlight/qcom-wled.c index e9fbe24..7c02f87 100644 --- a/drivers/video/backlight/qcom-wled.c +++ b/drivers/video/backlight/qcom-wled.c @@ -337,13 +337,13 @@ static int wled3_sync_toggle(struct wled *wled) rc = regmap_update_bits(wled->regmap, wled->sink_addr + WLED3_SINK_REG_SYNC, - mask, mask); + mask, WLED3_SINK_REG_SYNC_CLEAR); if (rc < 0) return rc; rc = regmap_update_bits(wled->regmap, wled->sink_addr + WLED3_SINK_REG_SYNC, - mask, WLED3_SINK_REG_SYNC_CLEAR); + mask, mask); return rc; } @@ -353,17 +353,17 @@ static int wled5_mod_sync_toggle(struct wled *wled) int rc; u8 val; - val = (wled->cfg.mod_sel == MOD_A) ? WLED5_SINK_REG_SYNC_MOD_A_BIT : - WLED5_SINK_REG_SYNC_MOD_B_BIT; rc = regmap_update_bits(wled->regmap, wled->sink_addr + WLED5_SINK_REG_MOD_SYNC_BIT, - WLED5_SINK_REG_SYNC_MASK, val); + WLED5_SINK_REG_SYNC_MASK, 0); if (rc < 0) return rc; + val = (wled->cfg.mod_sel == MOD_A) ? WLED5_SINK_REG_SYNC_MOD_A_BIT : + WLED5_SINK_REG_SYNC_MOD_B_BIT; return regmap_update_bits(wled->regmap, wled->sink_addr + WLED5_SINK_REG_MOD_SYNC_BIT, - WLED5_SINK_REG_SYNC_MASK, 0); + WLED5_SINK_REG_SYNC_MASK, val); } static int wled_ovp_fault_status(struct wled *wled, bool *fault_set)