diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/i2caux/dce110/i2caux_dce110.c')
-rw-r--r-- | drivers/gpu/drm/amd/display/dc/i2caux/dce110/i2caux_dce110.c | 311 |
1 files changed, 311 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/i2caux/dce110/i2caux_dce110.c b/drivers/gpu/drm/amd/display/dc/i2caux/dce110/i2caux_dce110.c new file mode 100644 index 000000000000..2a047f8ca0e9 --- /dev/null +++ b/drivers/gpu/drm/amd/display/dc/i2caux/dce110/i2caux_dce110.c @@ -0,0 +1,311 @@ +/* + * 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 + * + */ + +#include "dm_services.h" + +/* + * Pre-requisites: headers required by header of this unit + */ +#include "include/i2caux_interface.h" +#include "../i2caux.h" +#include "../engine.h" +#include "../i2c_engine.h" +#include "../i2c_sw_engine.h" +#include "../i2c_hw_engine.h" + +/* + * Header of this unit + */ +#include "i2caux_dce110.h" + +#include "i2c_sw_engine_dce110.h" +#include "i2c_hw_engine_dce110.h" +#include "aux_engine_dce110.h" + +/* + * Post-requisites: headers required by this unit + */ + +/* + * This unit + */ +/*cast pointer to struct i2caux TO pointer to struct i2caux_dce110*/ +#define FROM_I2C_AUX(ptr) \ + container_of((ptr), struct i2caux_dce110, base) + +static void destruct( + struct i2caux_dce110 *i2caux_dce110) +{ + dal_i2caux_destruct(&i2caux_dce110->base); +} + +static void destroy( + struct i2caux **i2c_engine) +{ + struct i2caux_dce110 *i2caux_dce110 = FROM_I2C_AUX(*i2c_engine); + + destruct(i2caux_dce110); + + kfree(i2caux_dce110); + + *i2c_engine = NULL; +} + +static struct i2c_engine *acquire_i2c_hw_engine( + struct i2caux *i2caux, + struct ddc *ddc) +{ + struct i2caux_dce110 *i2caux_dce110 = FROM_I2C_AUX(i2caux); + + struct i2c_engine *engine = NULL; + /* generic hw engine is not used for EDID read + * It may be needed for external i2c device, like thermal chip, + * TODO will be implemented when needed. + * check dce80 bool non_generic for generic hw engine; + */ + + if (!ddc) + return NULL; + + if (ddc->hw_info.hw_supported) { + enum gpio_ddc_line line = dal_ddc_get_line(ddc); + + if (line < GPIO_DDC_LINE_COUNT) + engine = i2caux->i2c_hw_engines[line]; + } + + if (!engine) + return NULL; + + if (!i2caux_dce110->i2c_hw_buffer_in_use && + engine->base.funcs->acquire(&engine->base, ddc)) { + i2caux_dce110->i2c_hw_buffer_in_use = true; + return engine; + } + + return NULL; +} + +static void release_engine( + struct i2caux *i2caux, + struct engine *engine) +{ + struct i2caux_dce110 *i2caux_dce110 = FROM_I2C_AUX(i2caux); + + if (engine->funcs->get_engine_type(engine) == + I2CAUX_ENGINE_TYPE_I2C_DDC_HW) + i2caux_dce110->i2c_hw_buffer_in_use = false; + + dal_i2caux_release_engine(i2caux, engine); +} + +static const enum gpio_ddc_line hw_ddc_lines[] = { + GPIO_DDC_LINE_DDC1, + GPIO_DDC_LINE_DDC2, + GPIO_DDC_LINE_DDC3, + GPIO_DDC_LINE_DDC4, + GPIO_DDC_LINE_DDC5, + GPIO_DDC_LINE_DDC6, +}; + +static const enum gpio_ddc_line hw_aux_lines[] = { + GPIO_DDC_LINE_DDC1, + GPIO_DDC_LINE_DDC2, + GPIO_DDC_LINE_DDC3, + GPIO_DDC_LINE_DDC4, + GPIO_DDC_LINE_DDC5, + GPIO_DDC_LINE_DDC6, +}; + +/* function table */ +static const struct i2caux_funcs i2caux_funcs = { + .destroy = destroy, + .acquire_i2c_hw_engine = acquire_i2c_hw_engine, + .release_engine = release_engine, + .acquire_i2c_sw_engine = dal_i2caux_acquire_i2c_sw_engine, + .acquire_aux_engine = dal_i2caux_acquire_aux_engine, +}; + +#include "dce/dce_11_0_d.h" +#include "dce/dce_11_0_sh_mask.h" + +/* set register offset */ +#define SR(reg_name)\ + .reg_name = mm ## reg_name + +/* set register offset with instance */ +#define SRI(reg_name, block, id)\ + .reg_name = mm ## block ## id ## _ ## reg_name + +#define aux_regs(id)\ +[id] = {\ + AUX_COMMON_REG_LIST(id), \ + .AUX_RESET_MASK = AUX_CONTROL__AUX_RESET_MASK \ +} + +#define hw_engine_regs(id)\ +{\ + I2C_HW_ENGINE_COMMON_REG_LIST(id) \ +} + +static const struct dce110_aux_registers dce110_aux_regs[] = { + aux_regs(0), + aux_regs(1), + aux_regs(2), + aux_regs(3), + aux_regs(4), + aux_regs(5) +}; + +static const struct dce110_i2c_hw_engine_registers i2c_hw_engine_regs[] = { + hw_engine_regs(1), + hw_engine_regs(2), + hw_engine_regs(3), + hw_engine_regs(4), + hw_engine_regs(5), + hw_engine_regs(6) +}; + +static const struct dce110_i2c_hw_engine_shift i2c_shift = { + I2C_COMMON_MASK_SH_LIST_DCE110(__SHIFT) +}; + +static const struct dce110_i2c_hw_engine_mask i2c_mask = { + I2C_COMMON_MASK_SH_LIST_DCE110(_MASK) +}; + +void dal_i2caux_dce110_construct( + struct i2caux_dce110 *i2caux_dce110, + struct dc_context *ctx, + const struct dce110_aux_registers aux_regs[], + const struct dce110_i2c_hw_engine_registers i2c_hw_engine_regs[], + const struct dce110_i2c_hw_engine_shift *i2c_shift, + const struct dce110_i2c_hw_engine_mask *i2c_mask) +{ + uint32_t i = 0; + uint32_t reference_frequency = 0; + bool use_i2c_sw_engine = false; + struct i2caux *base = NULL; + /*TODO: For CZ bring up, if dal_i2caux_get_reference_clock + * does not return 48KHz, we need hard coded for 48Khz. + * Some BIOS setting incorrect cause this + * For production, we always get value from BIOS*/ + reference_frequency = + dal_i2caux_get_reference_clock(ctx->dc_bios) >> 1; + + base = &i2caux_dce110->base; + + dal_i2caux_construct(base, ctx); + + i2caux_dce110->base.funcs = &i2caux_funcs; + i2caux_dce110->i2c_hw_buffer_in_use = false; + /* Create I2C engines (DDC lines per connector) + * different I2C/AUX usage cases, DDC, Generic GPIO, AUX. + */ + do { + enum gpio_ddc_line line_id = hw_ddc_lines[i]; + + struct i2c_hw_engine_dce110_create_arg hw_arg_dce110; + + if (use_i2c_sw_engine) { + struct i2c_sw_engine_dce110_create_arg sw_arg; + + sw_arg.engine_id = i; + sw_arg.default_speed = base->default_i2c_sw_speed; + sw_arg.ctx = ctx; + base->i2c_sw_engines[line_id] = + dal_i2c_sw_engine_dce110_create(&sw_arg); + } + + hw_arg_dce110.engine_id = i; + hw_arg_dce110.reference_frequency = reference_frequency; + hw_arg_dce110.default_speed = base->default_i2c_hw_speed; + hw_arg_dce110.ctx = ctx; + hw_arg_dce110.regs = &i2c_hw_engine_regs[i]; + hw_arg_dce110.i2c_shift = i2c_shift; + hw_arg_dce110.i2c_mask = i2c_mask; + + base->i2c_hw_engines[line_id] = + dal_i2c_hw_engine_dce110_create(&hw_arg_dce110); + + ++i; + } while (i < ARRAY_SIZE(hw_ddc_lines)); + + /* Create AUX engines for all lines which has assisted HW AUX + * 'i' (loop counter) used as DDC/AUX engine_id */ + + i = 0; + + do { + enum gpio_ddc_line line_id = hw_aux_lines[i]; + + struct aux_engine_dce110_init_data aux_init_data; + + aux_init_data.engine_id = i; + aux_init_data.timeout_period = base->aux_timeout_period; + aux_init_data.ctx = ctx; + aux_init_data.regs = &aux_regs[i]; + + base->aux_engines[line_id] = + dal_aux_engine_dce110_create(&aux_init_data); + + ++i; + } while (i < ARRAY_SIZE(hw_aux_lines)); + + /*TODO Generic I2C SW and HW*/ +} + +/* + * dal_i2caux_dce110_create + * + * @brief + * public interface to allocate memory for DCE11 I2CAUX + * + * @param + * struct adapter_service *as - [in] + * struct dc_context *ctx - [in] + * + * @return + * pointer to the base struct of DCE11 I2CAUX + */ +struct i2caux *dal_i2caux_dce110_create( + struct dc_context *ctx) +{ + struct i2caux_dce110 *i2caux_dce110 = + kzalloc(sizeof(struct i2caux_dce110), GFP_KERNEL); + + if (!i2caux_dce110) { + ASSERT_CRITICAL(false); + return NULL; + } + + dal_i2caux_dce110_construct(i2caux_dce110, + ctx, + dce110_aux_regs, + i2c_hw_engine_regs, + &i2c_shift, + &i2c_mask); + return &i2caux_dce110->base; +} |