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drm/amd/display: add SW_USE_I2C_REG request.

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[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>
This commit is contained in:
Charlene Liu 2019-04-15 16:17:59 -04:00 • committed by Alex Deucher
commit c703e753c8
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.c
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@ -306,6 +306,8 @@ static bool setup_engine(
#if defined(CONFIG_DRM_AMD_DC_DCN2_0)
uint32_t reset_length = 0;
#endif
/* 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);
/* 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);