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| author |   Charlene Liu <charlene.liu@amd.com> | 2019-04-15 16:17:59 -0400 |
|---|---|---|
| committer |   Alex Deucher <alexander.deucher@amd.com> | 2019-05-24 12:20:49 -0500 |
| commit | f5ce9f3cba9f385bb4d0b4f76b6b32cef2b84da0 (patch) | |
| tree | 20edeb0de338bed607d9109107e18a170454b663 | |
| parent | drm/amd/display: add support for disconnected eDP panels (diff) | |
| download | linux-dev-f5ce9f3cba9f385bb4d0b4f76b6b32cef2b84da0.tar.xz linux-dev-f5ce9f3cba9f385bb4d0b4f76b6b32cef2b84da0.zip | |
drm/amd/display: add SW_USE_I2C_REG request.
[Description]
This is for DC_I2c arbitration use between HW use/SW use and DMCU use.
Signed-off-by: Charlene Liu <charlene.liu@amd.com>
Reviewed-by: Krunoslav Kovac <Krunoslav.Kovac@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.c | 7 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.h | 3 |
2 files changed, 8 insertions, 2 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 cd26161bcc4d..526aab438374 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 @@ -268,6 +268,8 @@ static bool setup_engine( struct dce_i2c_hw *dce_i2c_hw) { uint32_t i2c_setup_limit = I2C_SETUP_TIME_LIMIT_DCE; + /* 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); if (dce_i2c_hw->setup_limit != 0) i2c_setup_limit = dce_i2c_hw->setup_limit; @@ -322,8 +324,6 @@ static void release_engine( set_speed(dce_i2c_hw, dce_i2c_hw->original_speed); - /* Release I2C */ - REG_UPDATE(DC_I2C_ARBITRATION, DC_I2C_SW_DONE_USING_I2C_REG, 1); /* Reset HW engine */ { @@ -343,6 +343,9 @@ static void release_engine( /* HW I2c engine - clock gating feature */ if (!dce_i2c_hw->engine_keep_power_up_count) REG_UPDATE_N(SETUP, 1, FN(SETUP, DC_I2C_DDC1_ENABLE), 0); + /* Release I2C after reset, so HW or DMCU could use it */ + REG_UPDATE_2(DC_I2C_ARBITRATION, DC_I2C_SW_DONE_USING_I2C_REG, 1, + DC_I2C_SW_USE_I2C_REG_REQ, 0); } diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.h b/drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.h index 575500755b2e..f718e3d396f2 100644 --- a/drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.h +++ b/drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.h @@ -105,6 +105,7 @@ enum { I2C_SF(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_DATA_DRIVE_SEL, mask_sh),\ I2C_SF(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_INTRA_TRANSACTION_DELAY, mask_sh),\ I2C_SF(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_INTRA_BYTE_DELAY, mask_sh),\ + I2C_SF(DC_I2C_ARBITRATION, DC_I2C_SW_USE_I2C_REG_REQ, mask_sh),\ I2C_SF(DC_I2C_ARBITRATION, DC_I2C_SW_DONE_USING_I2C_REG, mask_sh),\ I2C_SF(DC_I2C_ARBITRATION, DC_I2C_NO_QUEUED_SW_GO, mask_sh),\ I2C_SF(DC_I2C_ARBITRATION, DC_I2C_SW_PRIORITY, mask_sh),\ @@ -146,6 +147,7 @@ struct dce_i2c_shift { uint8_t DC_I2C_DDC1_INTRA_TRANSACTION_DELAY; uint8_t DC_I2C_DDC1_INTRA_BYTE_DELAY; uint8_t DC_I2C_SW_DONE_USING_I2C_REG; + uint8_t DC_I2C_SW_USE_I2C_REG_REQ; uint8_t DC_I2C_NO_QUEUED_SW_GO; uint8_t DC_I2C_SW_PRIORITY; uint8_t DC_I2C_SOFT_RESET; @@ -184,6 +186,7 @@ struct dce_i2c_mask { uint32_t DC_I2C_DDC1_INTRA_TRANSACTION_DELAY; uint32_t DC_I2C_DDC1_INTRA_BYTE_DELAY; uint32_t DC_I2C_SW_DONE_USING_I2C_REG; + uint32_t DC_I2C_SW_USE_I2C_REG_REQ; uint32_t DC_I2C_NO_QUEUED_SW_GO; uint32_t DC_I2C_SW_PRIORITY; uint32_t DC_I2C_SOFT_RESET; |