diff options
| author | Patrik Jakobsson <patrik.jakobsson@linux.intel.com> | 2015-11-16 15:01:05 +0100 |
|---|---|---|
| committer | Imre Deak <imre.deak@intel.com> | 2015-11-17 20:55:20 +0200 |
| commit | cd02ac52eb262f635f805d67963ad0aa0f23d6b2 (patch) | |
| tree | 4e813e5dd8fb044844f4db3e8f45be51d4d764ac /drivers/gpu/drm | |
| parent | b450e1778e9229aed58594fdd387d5a0e8137637 (diff) | |
drm/i915: Explain usage of power well IDs vs bit groups
v2: Add explanation of the fixed power well bits (Imre)
Signed-off-by: Patrik Jakobsson <patrik.jakobsson@linux.intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1447682467-6237-2-git-send-email-patrik.jakobsson@linux.intel.com
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 89018bab5ebd..082408ee5789 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -609,6 +609,7 @@ /* See the PUNIT HAS v0.8 for the below bits */ 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_MEDIA = 1, PUNIT_POWER_WELL_DISP2D = 3, @@ -621,10 +622,12 @@ enum punit_power_well { PUNIT_POWER_WELL_DPIO_RX1 = 11, PUNIT_POWER_WELL_DPIO_CMN_D = 12, + /* Not actual bit groups. Used as IDs for lookup_power_well() */ PUNIT_POWER_WELL_ALWAYS_ON, }; 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_DDI_A_E, SKL_DISP_PW_DDI_B, @@ -633,6 +636,7 @@ enum skl_disp_power_wells { SKL_DISP_PW_1 = 14, SKL_DISP_PW_2, + /* Not actual bit groups. Used as IDs for lookup_power_well() */ SKL_DISP_PW_ALWAYS_ON, }; |