drm: i915: Explicitly apply PWM config extracted from pwm_args

Call pwm_apply_args() just after requesting the PWM device so that the
polarity and period are initialized according to the information
provided in pwm_args.

This is an intermediate state, and pwm_apply_args() should be dropped as
soon as the atomic PWM infrastructure is in place and the driver makes
use of it.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c
index 21ee6477bf98..dc3a2e4f74c2 100644
--- a/drivers/gpu/drm/i915/intel_panel.c
+++ b/drivers/gpu/drm/i915/intel_panel.c
@@ -1640,6 +1640,12 @@ static int pwm_setup_backlight(struct intel_connector *connector,
                 return -ENODEV;
         }
 
+        /*
+         * FIXME: pwm_apply_args() should be removed when switching to
+         * the atomic PWM API.
+         */
+        pwm_apply_args(panel->backlight.pwm);
+
         retval = pwm_config(panel->backlight.pwm, CRC_PMIC_PWM_PERIOD_NS,
                             CRC_PMIC_PWM_PERIOD_NS);
         if (retval < 0) {