diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.c b/drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.c index 3e34afe8c504..7fbd92fbc63a 100644 --- a/drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.c +++ b/drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.c @@ -293,6 +293,14 @@ static bool setup_engine( { uint32_t i2c_setup_limit = I2C_SETUP_TIME_LIMIT_DCE; uint32_t reset_length = 0; + + if (dce_i2c_hw->ctx->dc->debug.enable_mem_low_power.bits.i2c) { + if (dce_i2c_hw->regs->DIO_MEM_PWR_CTRL) { + REG_UPDATE(DIO_MEM_PWR_CTRL, I2C_LIGHT_SLEEP_FORCE, 0); + REG_WAIT(DIO_MEM_PWR_STATUS, I2C_MEM_PWR_STATE, 0, 0, 5); + } + } + /* we have checked I2c not used by DMCU, set SW use I2C REQ to 1 to indicate SW using it*/ REG_UPDATE(DC_I2C_ARBITRATION, DC_I2C_SW_USE_I2C_REG_REQ, 1); @@ -369,6 +377,10 @@ static void release_engine( REG_UPDATE_2(DC_I2C_ARBITRATION, DC_I2C_SW_DONE_USING_I2C_REG, 1, DC_I2C_SW_USE_I2C_REG_REQ, 0); + if (dce_i2c_hw->ctx->dc->debug.enable_mem_low_power.bits.i2c) { + if (dce_i2c_hw->regs->DIO_MEM_PWR_CTRL) + REG_UPDATE(DIO_MEM_PWR_CTRL, I2C_LIGHT_SLEEP_FORCE, 1); + } } struct dce_i2c_hw *acquire_i2c_hw_engine( |