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, 11 insertions, 1 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 40f2d6e0b122..cd26161bcc4d 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 @@ -346,6 +346,16 @@ static void release_engine( } +static bool is_engine_available(struct dce_i2c_hw *dce_i2c_hw) +{ + unsigned int arbitrate; + + REG_GET(DC_I2C_ARBITRATION, DC_I2C_REG_RW_CNTL_STATUS, &arbitrate); + if (arbitrate == DC_I2C_REG_RW_CNTL_STATUS_DMCU_ONLY) + return false; + return true; +} + struct dce_i2c_hw *acquire_i2c_hw_engine( struct resource_pool *pool, struct ddc *ddc) @@ -368,7 +378,7 @@ struct dce_i2c_hw *acquire_i2c_hw_engine( if (!dce_i2c_hw) return NULL; - if (pool->i2c_hw_buffer_in_use) + if (pool->i2c_hw_buffer_in_use || !is_engine_available(dce_i2c_hw)) return NULL; do { |