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Commit 9a41e17d authored by Deepak M's avatar Deepak M Committed by Jani Nikula
Browse files

drm/i915: Parse LFP brightness control field in VBT 



These fields in VBT indicates the PWM source which
is used and also the controller number.

v2 by Jani: check for out of bounds access, some renames, change default
type, etc.

v3 by Jani: s/INTEL_BACKLIGHT_CABC/INTEL_BACKLIGHT_DSI_DCS/

Signed-off-by: default avatarDeepak M <m.deepak@intel.com>
Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/eee2f7b683a081f006a7df1ddad9b20fbf53c48c.1461676337.git.jani.nikula@intel.com
parent ea9d9768

drivers/gpu/drm/i915/i915_drv.h

+1 −0
Original line number Diff line number Diff line
@@ -1492,6 +1492,7 @@ struct intel_vbt_data { 
		bool present;

		bool active_low_pwm;

		u8 min_brightness;	/* min_brightness/255 of max */

		enum intel_backlight_type type;

	} backlight;



	/* MIPI DSI */

drivers/gpu/drm/i915/intel_bios.c

+9 −0
Original line number Diff line number Diff line
@@ -318,6 +318,15 @@ parse_lfp_backlight(struct drm_i915_private *dev_priv, 
		return;

	}



	dev_priv->vbt.backlight.type = INTEL_BACKLIGHT_DISPLAY_DDI;

	if (bdb->version >= 191 &&

	    get_blocksize(backlight_data) >= sizeof(*backlight_data)) {

		const struct bdb_lfp_backlight_control_method *method;



		method = &backlight_data->backlight_control[panel_type];

		dev_priv->vbt.backlight.type = method->type;

	}



	dev_priv->vbt.backlight.pwm_freq_hz = entry->pwm_freq_hz;

	dev_priv->vbt.backlight.active_low_pwm = entry->active_low_pwm;

	dev_priv->vbt.backlight.min_brightness = entry->min_brightness;

drivers/gpu/drm/i915/intel_bios.h

+8 −0
Original line number Diff line number Diff line
@@ -30,6 +30,14 @@ 
#ifndef _INTEL_BIOS_H_

#define _INTEL_BIOS_H_



enum intel_backlight_type {

	INTEL_BACKLIGHT_PMIC,

	INTEL_BACKLIGHT_LPSS,

	INTEL_BACKLIGHT_DISPLAY_DDI,

	INTEL_BACKLIGHT_DSI_DCS,

	INTEL_BACKLIGHT_PANEL_DRIVER_INTERFACE,

};



struct edp_power_seq {

	u16 t1_t3;

	u16 t8;

drivers/gpu/drm/i915/intel_vbt_defs.h

+6 −0
Original line number Diff line number Diff line
@@ -446,10 +446,16 @@ struct bdb_lfp_backlight_data_entry { 
	u8 obsolete3;

} __packed;



struct bdb_lfp_backlight_control_method {

	u8 type:4;

	u8 controller: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_method backlight_control[16];

} __packed;



struct aimdb_header {