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| author | José Roberto de Souza <jose.souza@intel.com> | 2020-07-15 10:56:37 -0700 |
|---|---|---|
| committer | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2020-08-17 16:15:53 -0400 |
| commit | 81619f4a75ed75823d52f46e167fa82d72c1eeef (patch) | |
| tree | 8e46690d35e0df4db04c28f06fa71b7adc05d805 /drivers/gpu/drm/i915/i915_reg.h | |
| parent | f2bde2546b81b64fb58aa04888fdd82a090b3908 (diff) | |
| download | linux-stable-81619f4a75ed75823d52f46e167fa82d72c1eeef.tar.gz linux-stable-81619f4a75ed75823d52f46e167fa82d72c1eeef.tar.bz2 linux-stable-81619f4a75ed75823d52f46e167fa82d72c1eeef.zip | |
drm/i915/display: Implement HOBL
Hours Of Battery Life is a new GEN12+ power-saving feature that allows
supported motherboards to use a special voltage swing table for eDP
panels that uses less power.
So here if supported by HW, OEM will set it in VBT and i915 will try
to train link with HOBL vswing table if link training fails it fall
back to the original table.
intel_ddi_dp_preemph_max() was optimized to only check the HOBL flag
instead of do something like is done in intel_ddi_dp_voltage_max()
because it is only called after the first entry of the voltage swing
table was loaded so the HOBL flag is valid at that point.
v3:
- removed a few parameters of icl_ddi_combo_vswing_program() that
can be taken from encoder
v4:
- using the HOBL vswing table until training fails completely (Ville)
v5:
- not reducing lane or link rate when link training fails with HOBL
active
- duplicated the HOBL voltage swing entry to match DP spec requirement
v6:
- removed the optional VS 3 & pre-emp 0 from HOBL table
- changed from u8:1 to bool to store hobl_failed/active
BSpec: 49291
BSpec: 49399
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Animesh Manna <animesh.manna@intel.com>
Cc: Manasi Navare <manasi.d.navare@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200715175637.33763-1-jose.souza@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_reg.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 4e796ff4d7d0..b9607ac3620d 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -1898,6 +1898,8 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg) #define PWR_DOWN_LN_3_1_0 (0xb << 4) #define PWR_DOWN_LN_MASK (0xf << 4) #define PWR_DOWN_LN_SHIFT 4 +#define EDP4K2K_MODE_OVRD_EN (1 << 3) +#define EDP4K2K_MODE_OVRD_OPTIMIZED (1 << 2) #define ICL_PORT_CL_DW12(phy) _MMIO(_ICL_PORT_CL_DW(12, phy)) #define ICL_LANE_ENABLE_AUX (1 << 0) |