diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/i2caux/i2c_hw_engine.h')
-rw-r--r-- | drivers/gpu/drm/amd/display/dc/i2caux/i2c_hw_engine.h | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/i2caux/i2c_hw_engine.h b/drivers/gpu/drm/amd/display/dc/i2caux/i2c_hw_engine.h new file mode 100644 index 000000000000..8936a994804a --- /dev/null +++ b/drivers/gpu/drm/amd/display/dc/i2caux/i2c_hw_engine.h @@ -0,0 +1,80 @@ +/* + * Copyright 2012-15 Advanced Micro Devices, Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: AMD + * + */ + +#ifndef __DAL_I2C_HW_ENGINE_H__ +#define __DAL_I2C_HW_ENGINE_H__ + +enum { + TRANSACTION_TIMEOUT_IN_I2C_CLOCKS = 32 +}; + +struct i2c_hw_engine; + +struct i2c_hw_engine_funcs { + uint32_t (*get_hw_buffer_available_size)( + const struct i2c_hw_engine *engine); + enum i2c_channel_operation_result (*wait_on_operation_result)( + struct i2c_hw_engine *engine, + uint32_t timeout, + enum i2c_channel_operation_result expected_result); + uint32_t (*get_transaction_timeout)( + const struct i2c_hw_engine *engine, + uint32_t length); +}; + +struct i2c_hw_engine { + struct i2c_engine base; + const struct i2c_hw_engine_funcs *funcs; + + /* Values below are in kilohertz */ + uint32_t original_speed; + uint32_t default_speed; +}; + +void dal_i2c_hw_engine_construct( + struct i2c_hw_engine *engine, + struct dc_context *ctx); + +void dal_i2c_hw_engine_destruct( + struct i2c_hw_engine *engine); + +enum i2c_channel_operation_result dal_i2c_hw_engine_wait_on_operation_result( + struct i2c_hw_engine *engine, + uint32_t timeout, + enum i2c_channel_operation_result expected_result); + +bool dal_i2c_hw_engine_acquire_engine( + struct i2c_engine *engine, + struct ddc *ddc); + +bool dal_i2c_hw_engine_submit_request( + struct engine *ptr, + struct i2caux_transaction_request *i2caux_request, + bool middle_of_transaction); + +enum i2caux_engine_type dal_i2c_hw_engine_get_engine_type( + const struct engine *engine); + +#endif |