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 | 79 |
1 files changed, 18 insertions, 61 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 aad7b52165be..066188ba7949 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 @@ -100,20 +100,6 @@ static uint32_t get_hw_buffer_available_size( dce_i2c_hw->buffer_used_bytes; } -static uint32_t get_speed( - const struct dce_i2c_hw *dce_i2c_hw) -{ - uint32_t pre_scale = 0; - - REG_GET(SPEED, DC_I2C_DDC1_PRESCALE, &pre_scale); - - /* [anaumov] it seems following is unnecessary */ - /*ASSERT(value.bits.DC_I2C_DDC1_PRESCALE);*/ - return pre_scale ? - dce_i2c_hw->reference_frequency / pre_scale : - dce_i2c_hw->default_speed; -} - static void process_channel_reply( struct dce_i2c_hw *dce_i2c_hw, struct i2c_payload *reply) @@ -278,16 +264,25 @@ static void set_speed( struct dce_i2c_hw *dce_i2c_hw, uint32_t speed) { + uint32_t xtal_ref_div = 0; + uint32_t prescale = 0; + + REG_GET(MICROSECOND_TIME_BASE_DIV, XTAL_REF_DIV, &xtal_ref_div); + + if (xtal_ref_div == 0) + xtal_ref_div = 2; + + prescale = ((dce_i2c_hw->reference_frequency * 2) / xtal_ref_div) / speed; if (speed) { if (dce_i2c_hw->masks->DC_I2C_DDC1_START_STOP_TIMING_CNTL) REG_UPDATE_N(SPEED, 3, - FN(DC_I2C_DDC1_SPEED, DC_I2C_DDC1_PRESCALE), dce_i2c_hw->reference_frequency / speed, + FN(DC_I2C_DDC1_SPEED, DC_I2C_DDC1_PRESCALE), prescale, FN(DC_I2C_DDC1_SPEED, DC_I2C_DDC1_THRESHOLD), 2, FN(DC_I2C_DDC1_SPEED, DC_I2C_DDC1_START_STOP_TIMING_CNTL), speed > 50 ? 2:1); else REG_UPDATE_N(SPEED, 2, - FN(DC_I2C_DDC1_SPEED, DC_I2C_DDC1_PRESCALE), dce_i2c_hw->reference_frequency / speed, + FN(DC_I2C_DDC1_SPEED, DC_I2C_DDC1_PRESCALE), prescale, FN(DC_I2C_DDC1_SPEED, DC_I2C_DDC1_THRESHOLD), 2); } } @@ -296,9 +291,7 @@ static bool setup_engine( struct dce_i2c_hw *dce_i2c_hw) { uint32_t i2c_setup_limit = I2C_SETUP_TIME_LIMIT_DCE; -#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); @@ -322,14 +315,12 @@ static bool setup_engine( REG_UPDATE_N(SETUP, 2, FN(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_TIME_LIMIT), i2c_setup_limit, FN(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_ENABLE), 1); -#if defined(CONFIG_DRM_AMD_DC_DCN2_0) } else { reset_length = dce_i2c_hw->send_reset_length; REG_UPDATE_N(SETUP, 3, FN(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_TIME_LIMIT), i2c_setup_limit, FN(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_SEND_RESET_LENGTH), reset_length, FN(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_ENABLE), 1); -#endif } /* Program HW priority * set to High - interrupt software I2C at any time @@ -348,9 +339,7 @@ static void release_engine( bool safe_to_reset; /* Restore original HW engine speed */ - - set_speed(dce_i2c_hw, dce_i2c_hw->original_speed); - + set_speed(dce_i2c_hw, dce_i2c_hw->default_speed); /* Reset HW engine */ { @@ -382,7 +371,6 @@ struct dce_i2c_hw *acquire_i2c_hw_engine( { uint32_t counter = 0; enum gpio_result result; - uint32_t current_speed; struct dce_i2c_hw *dce_i2c_hw = NULL; if (!ddc) @@ -420,11 +408,6 @@ struct dce_i2c_hw *acquire_i2c_hw_engine( dce_i2c_hw->ddc = ddc; - current_speed = get_speed(dce_i2c_hw); - - if (current_speed) - dce_i2c_hw->original_speed = current_speed; - if (!setup_engine(dce_i2c_hw)) { release_engine(dce_i2c_hw); return NULL; @@ -482,13 +465,9 @@ static void submit_channel_request_hw( static uint32_t get_transaction_timeout_hw( const struct dce_i2c_hw *dce_i2c_hw, - uint32_t length) + uint32_t length, + uint32_t speed) { - - uint32_t speed = get_speed(dce_i2c_hw); - - - uint32_t period_timeout; uint32_t num_of_clock_stretches; @@ -508,7 +487,8 @@ static uint32_t get_transaction_timeout_hw( bool dce_i2c_hw_engine_submit_payload( struct dce_i2c_hw *dce_i2c_hw, struct i2c_payload *payload, - bool middle_of_transaction) + bool middle_of_transaction, + uint32_t speed) { struct i2c_request_transaction_data request; @@ -546,7 +526,7 @@ bool dce_i2c_hw_engine_submit_payload( /* obtain timeout value before submitting request */ transaction_timeout = get_transaction_timeout_hw( - dce_i2c_hw, payload->length + 1); + dce_i2c_hw, payload->length + 1, speed); submit_channel_request_hw( dce_i2c_hw, &request); @@ -592,13 +572,11 @@ bool dce_i2c_submit_command_hw( struct i2c_payload *payload = cmd->payloads + index_of_payload; if (!dce_i2c_hw_engine_submit_payload( - dce_i2c_hw, payload, mot)) { + dce_i2c_hw, payload, mot, cmd->speed)) { result = false; break; } - - ++index_of_payload; } @@ -629,7 +607,6 @@ void dce_i2c_hw_construct( dce_i2c_hw->buffer_used_bytes = 0; dce_i2c_hw->transaction_count = 0; dce_i2c_hw->engine_keep_power_up_count = 1; - dce_i2c_hw->original_speed = DEFAULT_I2C_HW_SPEED; dce_i2c_hw->default_speed = DEFAULT_I2C_HW_SPEED; dce_i2c_hw->send_reset_length = 0; dce_i2c_hw->setup_limit = I2C_SETUP_TIME_LIMIT_DCE; @@ -644,9 +621,6 @@ void dce100_i2c_hw_construct( const struct dce_i2c_shift *shifts, const struct dce_i2c_mask *masks) { - - uint32_t xtal_ref_div = 0; - dce_i2c_hw_construct(dce_i2c_hw, ctx, engine_id, @@ -654,21 +628,6 @@ void dce100_i2c_hw_construct( shifts, masks); dce_i2c_hw->buffer_size = I2C_HW_BUFFER_SIZE_DCE100; - - REG_GET(MICROSECOND_TIME_BASE_DIV, XTAL_REF_DIV, &xtal_ref_div); - - if (xtal_ref_div == 0) - xtal_ref_div = 2; - - /*Calculating Reference Clock by divding original frequency by - * XTAL_REF_DIV. - * At upper level, uint32_t reference_frequency = - * dal_dce_i2c_get_reference_clock(as) >> 1 - * which already divided by 2. So we need x2 to get original - * reference clock from ppll_info - */ - dce_i2c_hw->reference_frequency = - (dce_i2c_hw->reference_frequency * 2) / xtal_ref_div; } void dce112_i2c_hw_construct( @@ -705,7 +664,6 @@ void dcn1_i2c_hw_construct( dce_i2c_hw->setup_limit = I2C_SETUP_TIME_LIMIT_DCN; } -#if defined(CONFIG_DRM_AMD_DC_DCN2_0) void dcn2_i2c_hw_construct( struct dce_i2c_hw *dce_i2c_hw, struct dc_context *ctx, @@ -724,4 +682,3 @@ void dcn2_i2c_hw_construct( if (ctx->dc->debug.scl_reset_length10) dce_i2c_hw->send_reset_length = I2C_SEND_RESET_LENGTH_10; } -#endif |