diff options
| author | Prabal Saha <coolstarorganization@gmail.com> | 2016-06-18 20:47:21 -0700 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2016-08-02 00:47:26 +0200 |
| commit | 0f2025da0fd4dce6b951b4c4b97c9370ca7d66db (patch) | |
| tree | ea6a90f6d4387b86c984bb0f16ea2e10f5c2446b /src/southbridge/intel/lynxpoint | |
| parent | 6e8233a60b475ff56bfe672293f081653e552510 (diff) | |
intel/lynxpoint,broadwell: Fix eDP display in Windows, SeaBios & Tiano
Without this patch, eDP output is non-functional pre-graphics driver
regardless of payload (SeaBIOS, Tianocore) or video init method
(VBIOS, GOP driver) and once the standard Windows Intel HD graphics
driver is loaded.
Test: Boot Windows on peppy and auron_paine, install Intel HD
Graphics driver, observe functional eDP output with full video
acceleration.
Debugging method: adjust location of call to run VBIOS within
coreboot, observed that eDP output functional if the VBIOS is run
before the power optimizer lines, broken if run afterwards.
Change-Id: I6d8252e3de396887c84533e355f41693b9ea7514
Signed-off-by: Prabal Saha <coolstarorganization@gmail.com>
Reviewed-on: https://review.coreboot.org/15261
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
Diffstat (limited to 'src/southbridge/intel/lynxpoint')
| -rw-r--r-- | src/southbridge/intel/lynxpoint/Kconfig | 9 | ||||
| -rw-r--r-- | src/southbridge/intel/lynxpoint/lpc.c | 2 |
2 files changed, 11 insertions, 0 deletions
diff --git a/src/southbridge/intel/lynxpoint/Kconfig b/src/southbridge/intel/lynxpoint/Kconfig index eea0c01043..7615e69cc3 100644 --- a/src/southbridge/intel/lynxpoint/Kconfig +++ b/src/southbridge/intel/lynxpoint/Kconfig @@ -96,4 +96,13 @@ config LOCK_MANAGEMENT_ENGINE bool default n +config LYNXPOINT_POWER_OPTIMIZER + bool "Enable Power Optimizer" + default y if CHROMEOS + help + Enable the power optimizer for the High Speed I/O + Power Control (HSIOPC). This can break graphics + under Windows, but can improve battery life under + 'mostly idle' conditions. + endif diff --git a/src/southbridge/intel/lynxpoint/lpc.c b/src/southbridge/intel/lynxpoint/lpc.c index f4c3826aa9..1d20bbbe3b 100644 --- a/src/southbridge/intel/lynxpoint/lpc.c +++ b/src/southbridge/intel/lynxpoint/lpc.c @@ -346,6 +346,7 @@ const struct rcba_config_instruction lpt_lp_pm_rcba[] = { RCBA_RMW_REG_32(0x33b4, 0, 0x00007001), RCBA_RMW_REG_32(0x3350, 0, 0x022ddfff), RCBA_RMW_REG_32(0x3354, 0, 0x00000001), +#if IS_ENABLED(CONFIG_LYNXPOINT_POWER_OPTIMIZER) RCBA_RMW_REG_32(0x33d4, ~0, 0x08000000), /* Power Optimizer */ RCBA_RMW_REG_32(0x33c8, ~0, 0x08000080), /* Power Optimizer */ RCBA_RMW_REG_32(0x2b10, 0, 0x0000883c), /* Power Optimizer */ @@ -353,6 +354,7 @@ const struct rcba_config_instruction lpt_lp_pm_rcba[] = { RCBA_RMW_REG_32(0x2b24, 0, 0x40000005), /* Power Optimizer */ RCBA_RMW_REG_32(0x2b20, 0, 0x0005db01), /* Power Optimizer */ RCBA_RMW_REG_32(0x3a80, 0, 0x05145005), +#endif RCBA_END_CONFIG }; |