iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

- Bug fixes

Browse Source 
- Fix brightness levels when !DT
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEEdrbJNaO+IJqU8IdIUa+KL4f8d2EFAlwOiMQACgkQUa+KL4f8
 d2H+DBAAlzcOMz5pGA5UDaRHmY0WJ2jr7WC+2sfQZJAKmM+jN43de9yeTeUhrd73
 BUWvu8IoI7PnXiU0tWRC76L8gLVpoY6ptqJnbgdjmRtuWl0fhToG2u7pzU0L+tkl
 /EMI3M6lBKfrk6+nIim+/KrrTajyYFVIdM+CJXPkgIXe/suTKFD9DFJoHSCPnK/q
 VKasyk9sRdjfYdSsZSO7EO10FtllHgwP0wVJZgIZxVz+DL5rEvoGcWDKT1/zcTLT
 u18rtdgRVNanfbh0OQDTPI48FxfQIJfQeKuqk8b4FYMMGdQgG6ssnwD4CCGahl3V
 fCGK1vYOGZgT3DbgIHBvB68Y8F73IlhxlDIqlRjTjF8nQ3VvTxHfBHTBg6STK4M7
 eWNLh1sI/pkrmrUbqHffnsdTr4bZEDRR9SyfzCGOqtAlWe0a5nmS8bhtnRJ7Q3d1
 GJpCxakC6qkas59Qb5i7mpGclvKH0yDAk9OCgnvnNiCfK+Hh5WrYXJTSk7BIwsGL
 /ORvZ1G60wRdQYCEMSq+AXo7dROiMWhQ2CZ6cICgtRHWJFPB38Mr7RvHyvfIyY43
 1SKk/OYsBAIvhiiGvPJ5rxnx50QCzA3/gkATpPCtbUiOspdSG/Q69vUK1tVbXYV5
 aBYPkUPSlYKgvOGMjydKohetzB+X24MWvlIDBZCeRajWzPxQKK0=
 =UZ0a
 -----END PGP SIGNATURE-----

Merge tag 'backlight-fixes-4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight

Pull backlight fix from Lee Jones:
 "Fix brightness levels when !DT in pwm_bl driver"

* tag 'backlight-fixes-4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight:
  backlight: pwm_bl: Fix brightness levels for non-DT case.
This commit is contained in:
Linus Torvalds 2018-12-10 09:47:42 -08:00
commit 9bb40f0108
1 changed files with 35 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
drivers/video/backlight/pwm_bl.c
View File

@ -562,7 +562,30 @@ static int pwm_backlight_probe(struct platform_device *pdev)
goto err_alloc;
}
if (!data->levels) {
if (data->levels) {
/*
* For the DT case, only when brightness levels is defined
* data->levels is filled. For the non-DT case, data->levels
* can come from platform data, however is not usual.
*/
for (i = 0; i <= data->max_brightness; i++) {
if (data->levels[i] > pb->scale)
pb->scale = data->levels[i];
pb->levels = data->levels;
}
} else if (!data->max_brightness) {
/*
* If no brightness levels are provided and max_brightness is
* not set, use the default brightness table. For the DT case,
* max_brightness is set to 0 when brightness levels is not
* specified. For the non-DT case, max_brightness is usually
* set to some value.
*/
/* Get the PWM period (in nanoseconds) */
pwm_get_state(pb->pwm, &state);
ret = pwm_backlight_brightness_default(&pdev->dev, data,
state.period);
if (ret < 0) {
@ -570,13 +593,19 @@ static int pwm_backlight_probe(struct platform_device *pdev)
"failed to setup default brightness table\n");
goto err_alloc;
}
}
for (i = 0; i <= data->max_brightness; i++) {
if (data->levels[i] > pb->scale)
pb->scale = data->levels[i];
for (i = 0; i <= data->max_brightness; i++) {
if (data->levels[i] > pb->scale)
pb->scale = data->levels[i];
pb->levels = data->levels;
pb->levels = data->levels;
}
} else {
/*
* That only happens for the non-DT case, where platform data
* sets the max_brightness value.
*/
pb->scale = data->max_brightness;
}
pb->lth_brightness = data->lth_brightness * (state.period / pb->scale);