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Commit cd02ac52 authored by Patrik Jakobsson's avatar Patrik Jakobsson Committed by Imre Deak
Browse files

drm/i915: Explain usage of power well IDs vs bit groups 



v2: Add explanation of the fixed power well bits (Imre)

Signed-off-by: default avatarPatrik Jakobsson <patrik.jakobsson@linux.intel.com>
Reviewed-by: default avatarImre Deak <imre.deak@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1447682467-6237-2-git-send-email-patrik.jakobsson@linux.intel.com
parent b450e177

drivers/gpu/drm/i915/i915_reg.h

+4 −0
Original line number Original line Diff line number Diff line
@@ -609,6 +609,7 @@ 




/* See the PUNIT HAS v0.8 for the below bits */

/* See the PUNIT HAS v0.8 for the below bits */

enum punit_power_well {

enum punit_power_well {

	/* These numbers are fixed and must match the position of the pw bits */

	PUNIT_POWER_WELL_RENDER			= 0,

	PUNIT_POWER_WELL_RENDER			= 0,

	PUNIT_POWER_WELL_MEDIA			= 1,

	PUNIT_POWER_WELL_MEDIA			= 1,

	PUNIT_POWER_WELL_DISP2D			= 3,

	PUNIT_POWER_WELL_DISP2D			= 3,
@@ -621,10 +622,12 @@ enum punit_power_well { 
	PUNIT_POWER_WELL_DPIO_RX1		= 11,

	PUNIT_POWER_WELL_DPIO_RX1		= 11,

	PUNIT_POWER_WELL_DPIO_CMN_D		= 12,

	PUNIT_POWER_WELL_DPIO_CMN_D		= 12,





	/* Not actual bit groups. Used as IDs for lookup_power_well() */

	PUNIT_POWER_WELL_ALWAYS_ON,

	PUNIT_POWER_WELL_ALWAYS_ON,

};

};





enum skl_disp_power_wells {

enum skl_disp_power_wells {

	/* These numbers are fixed and must match the position of the pw bits */

	SKL_DISP_PW_MISC_IO,

	SKL_DISP_PW_MISC_IO,

	SKL_DISP_PW_DDI_A_E,

	SKL_DISP_PW_DDI_A_E,

	SKL_DISP_PW_DDI_B,

	SKL_DISP_PW_DDI_B,
@@ -633,6 +636,7 @@ enum skl_disp_power_wells { 
	SKL_DISP_PW_1 = 14,

	SKL_DISP_PW_1 = 14,

	SKL_DISP_PW_2,

	SKL_DISP_PW_2,





	/* Not actual bit groups. Used as IDs for lookup_power_well() */

	SKL_DISP_PW_ALWAYS_ON,

	SKL_DISP_PW_ALWAYS_ON,

};

};