[Intel-gfx] [PATCH 05/11] CHROMIUM: drm/i915: parse backlight modulation frequency from the BIOS VBT

[clinton.a.taylor at intel.com]

From: Jani Nikula <jani.nikula at intel.com>

We don't actually do anything with the information yet, but parse and
log what's in the VBT.

Signed-off-by: Jani Nikula <jani.nikula at intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi at gmail.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi at gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
(cherry picked from commit f00076d2fd3fe25b2e8c83921818914dee37ffef)

Signed-off-by: Wayne Boyer <wayne.boyer at intel.com>

Change-Id: Ia3eb119069dfdb109f9c49a6d27f8d13ad8ba80a
Reviewed-on: https://chromium-review.googlesource.com/196606
Reviewed-by: Aaron Durbin <adurbin at chromium.org>
Tested-by: Wayne Boyer <wayne.boyer at intel.com>
Commit-Queue: Wayne Boyer <wayne.boyer at intel.com>

Conflicts:
	drivers/gpu/drm/i915/i915_drv.h
	drivers/gpu/drm/i915/intel_bios.c
---
 drivers/gpu/drm/i915/intel_bios.h |   16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_bios.h b/drivers/gpu/drm/i915/intel_bios.h
index b986677..62cd658 100644
--- a/drivers/gpu/drm/i915/intel_bios.h
+++ b/drivers/gpu/drm/i915/intel_bios.h
@@ -408,6 +408,22 @@ struct bdb_lfp_backlight_data {
 	u8 level[16];
 } __packed;
 
+struct bdb_lfp_backlight_data_entry {
+	u8 type:2;
+	u8 active_low_pwm:1;
+	u8 obsolete1:5;
+	u16 pwm_freq_hz;
+	u8 min_brightness;
+	u8 obsolete2;
+	u8 obsolete3;
+} __packed;
+
+struct bdb_lfp_backlight_data {
+	u8 entry_size;
+	struct bdb_lfp_backlight_data_entry data[16];
+	u8 level[16];
+} __packed;
+
 struct aimdb_header {
 	char signature[16];
 	char oem_device[20];
-- 
1.7.9.5