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authorDeepak M <m.deepak@intel.com>2014-12-15 13:28:21 +0300
committerDaniel Vetter <daniel.vetter@ffwll.ch>2014-12-15 13:25:29 +0300
commit371abae844ede392066bfc21202b2e40f4a654d1 (patch)
treeef1d50ae9bf08eaf8f9173e356a7227df3fc9919 /drivers/gpu/drm/i915/intel_bios.h
parentd9d8e6b3c01386e5b39b70dc07156ff0e407d984 (diff)
downloadlinux-371abae844ede392066bfc21202b2e40f4a654d1.tar.xz
drm/i915: Parsing LFP brightness control from VBT
LFP brighness control from the VBT block 43 indicates which controller is used for brightness. LFP1 brightness control method: Bit 7-4 = This field controller number of the brightnes controller. 0 = Controller 0 1 = Controller 1 2 = Controller 2 3 = Controller 3 Others = Reserved Bits 3-0 = This field specifies the brightness control pin to be used on the platform. 0 = PMIC pin is used for brightness control 1 = LPSS PWM is used for brightness control 2 = Display DDI is used for brightness control 3 = CABC method to control brightness Others = Reserved Adding the above fields in dev_priv->vbt and corresponding changes in parse_backlight() v2: Jani's review comments addressed - Move PWM definitions to intel_bios.h - Moving vbt_version to intel_vbt_data - Rename brightness to bl_ctrl_data - Logging just control_pin instead of string - Avoid adding vbt_version in dev_priv - Since only DDI option is available as of now, let control pin DDI affect dev_priv->vbt.backlight.present v3: Jani's review comments addressed - Drop control_pin - Use bdb->version - set controller to 0 instead of using control pin define - check controller bounds - remove superfluous changes in intel_parse_bios Signed-off-by: Deepak M <m.deepak@intel.com> Signed-off-by: Vandana Kannan <vandana.kannan@intel.com> Reviewed-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_bios.h')
-rw-r--r--drivers/gpu/drm/i915/intel_bios.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_bios.h b/drivers/gpu/drm/i915/intel_bios.h
index a6a8710f665f..9a7202e5caf4 100644
--- a/drivers/gpu/drm/i915/intel_bios.h
+++ b/drivers/gpu/drm/i915/intel_bios.h
@@ -402,10 +402,21 @@ struct bdb_lfp_backlight_data_entry {
u8 obsolete3;
} __packed;
+#define BLC_CONTROL_PIN_PMIC 0
+#define BLC_CONTROL_PIN_LPSS_PWM 1
+#define BLC_CONTROL_PIN_DDI 2
+#define BLC_CONTROL_PIN_CABC 3
+
+struct bdb_lfp_backlight_control_data {
+ u8 controller:4;
+ u8 pin:4;
+} __packed;
+
struct bdb_lfp_backlight_data {
u8 entry_size;
struct bdb_lfp_backlight_data_entry data[16];
u8 level[16];
+ struct bdb_lfp_backlight_control_data blc_ctl[16];
} __packed;
struct aimdb_header {