diff mbox series

[07/10] backlight: qcom-wled: Provide enabled_strings default for wled 4 and 5

Message ID 20211004192741.621870-8-marijn.suijten@somainline.org (mailing list archive)
State New, archived
Headers show
Series backlight: qcom-wled: fix and solidify handling of enabled-strings | expand

Commit Message

Marijn Suijten Oct. 4, 2021, 7:27 p.m. UTC 
Only wled 3 sets a sensible default that allows operating this driver
with just qcom,num-strings in the DT; wled 4 and 5 require
qcom,enabled-strings to be provided otherwise enabled_strings remains
zero-initialized, resuling in every string-specific register write
(currently only the setup and config functions, brightness follows in a
future patch) to only configure the zero'th string multiple times.

Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
---
 drivers/video/backlight/qcom-wled.c | 2 ++
 1 file changed, 2 insertions(+)

Comments

Daniel Thompson Oct. 5, 2021, 9:21 a.m. UTC | #1 
On Mon, Oct 04, 2021 at 09:27:38PM +0200, Marijn Suijten wrote:
> Only wled 3 sets a sensible default that allows operating this driver
> with just qcom,num-strings in the DT; wled 4 and 5 require
> qcom,enabled-strings to be provided otherwise enabled_strings remains
> zero-initialized, resuling in every string-specific register write
> (currently only the setup and config functions, brightness follows in a
> future patch) to only configure the zero'th string multiple times.
> 
> Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>

Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
diff mbox series

Patch

diff --git a/drivers/video/backlight/qcom-wled.c b/drivers/video/backlight/qcom-wled.c
index 9ec1bdd374d2..f143b2563bfe 100644
--- a/drivers/video/backlight/qcom-wled.c
+++ b/drivers/video/backlight/qcom-wled.c
@@ -1077,6 +1077,7 @@  static const struct wled_config wled4_config_defaults = {
 	.cabc = false,
 	.external_pfet = false,
 	.auto_detection_enabled = false,
+	.enabled_strings = {0, 1, 2, 3},
 };
 
 static int wled5_setup(struct wled *wled)
@@ -1190,6 +1191,7 @@  static const struct wled_config wled5_config_defaults = {
 	.cabc = false,
 	.external_pfet = false,
 	.auto_detection_enabled = false,
+	.enabled_strings = {0, 1, 2, 3},
 };
 
 static const u32 wled3_boost_i_limit_values[] = {