From: Anusha Srivatsa <anusha.srivatsa@intel.com>
Date: Fri, 19 Jan 2018 16:48:12 -0200
Subject: drm/i915/icp: Add backlight Support for ICP
Git-commit: ccf6e0d9774657892e6715d519ea1c48c692158a
Patch-mainline: v4.17-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
ICP has two backlight controllers - similar to previous platforms like
BXT -, but we only use one controller for now, so we can just reuse
the CNP code.
v2: Remove the usage of ICP_SECOND_PPS_BACKLIGHT register.(Jani)
Reuse CNP code since it is very similar.(Ville)
v3 (from Paulo): Rebase.
v4 (from Paulo): adjust commit message (James) and comment (Rodrigo).
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Acked-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Acked-by: James Ausmus <james.ausmus@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180119184812.2888-1-paulo.r.zanoni@intel.com
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/i915/intel_panel.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/drivers/gpu/drm/i915/intel_panel.c
+++ b/drivers/gpu/drm/i915/intel_panel.c
@@ -1719,9 +1719,9 @@ cnp_setup_backlight(struct intel_connect
u32 pwm_ctl, val;
/*
- * CNP has the BXT implementation of backlight, but with only
- * one controller. Future platforms could have multiple controllers
- * so let's make this extensible and prepared for the future.
+ * CNP has the BXT implementation of backlight, but with only one
+ * controller. TODO: ICP has multiple controllers but we only use
+ * controller 0 for now.
*/
panel->backlight.controller = 0;
@@ -1865,7 +1865,7 @@ intel_panel_init_backlight_funcs(struct
panel->backlight.set = bxt_set_backlight;
panel->backlight.get = bxt_get_backlight;
panel->backlight.hz_to_pwm = bxt_hz_to_pwm;
- } else if (HAS_PCH_CNP(dev_priv)) {
+ } else if (HAS_PCH_CNP(dev_priv) || HAS_PCH_ICP(dev_priv)) {
panel->backlight.setup = cnp_setup_backlight;
panel->backlight.enable = cnp_enable_backlight;
panel->backlight.disable = cnp_disable_backlight;