diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dce/dce_aux.h')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dce/dce_aux.h | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_aux.h b/drivers/gpu/drm/amd/display/dc/dce/dce_aux.h new file mode 100644 index 000000000000..f7caab85dc80 --- /dev/null +++ b/drivers/gpu/drm/amd/display/dc/dce/dce_aux.h @@ -0,0 +1,111 @@ +/* + * 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_AUX_ENGINE_DCE110_H__ +#define __DAL_AUX_ENGINE_DCE110_H__ +#include "aux_engine.h" + +#define AUX_COMMON_REG_LIST(id)\ + SRI(AUX_CONTROL, DP_AUX, id), \ + SRI(AUX_ARB_CONTROL, DP_AUX, id), \ + SRI(AUX_SW_DATA, DP_AUX, id), \ + SRI(AUX_SW_CONTROL, DP_AUX, id), \ + SRI(AUX_INTERRUPT_CONTROL, DP_AUX, id), \ + SRI(AUX_SW_STATUS, DP_AUX, id), \ + SR(AUXN_IMPCAL), \ + SR(AUXP_IMPCAL) + +struct dce110_aux_registers { + uint32_t AUX_CONTROL; + uint32_t AUX_ARB_CONTROL; + uint32_t AUX_SW_DATA; + uint32_t AUX_SW_CONTROL; + uint32_t AUX_INTERRUPT_CONTROL; + uint32_t AUX_SW_STATUS; + uint32_t AUXN_IMPCAL; + uint32_t AUXP_IMPCAL; + + uint32_t AUX_RESET_MASK; +}; + +enum { /* This is the timeout as defined in DP 1.2a, + * 2.3.4 "Detailed uPacket TX AUX CH State Description". + */ + AUX_TIMEOUT_PERIOD = 400, + + /* Ideally, the SW timeout should be just above 550usec + * which is programmed in HW. + * But the SW timeout of 600usec is not reliable, + * because on some systems, delay_in_microseconds() + * returns faster than it should. + * EPR #379763: by trial-and-error on different systems, + * 700usec is the minimum reliable SW timeout for polling + * the AUX_SW_STATUS.AUX_SW_DONE bit. + * This timeout expires *only* when there is + * AUX Error or AUX Timeout conditions - not during normal operation. + * During normal operation, AUX_SW_STATUS.AUX_SW_DONE bit is set + * at most within ~240usec. That means, + * increasing this timeout will not affect normal operation, + * and we'll timeout after + * SW_AUX_TIMEOUT_PERIOD_MULTIPLIER * AUX_TIMEOUT_PERIOD = 1600usec. + * This timeout is especially important for + * resume from S3 and CTS. + */ + SW_AUX_TIMEOUT_PERIOD_MULTIPLIER = 4 +}; +struct aux_engine_dce110 { + struct aux_engine base; + const struct dce110_aux_registers *regs; + struct { + uint32_t aux_control; + uint32_t aux_arb_control; + uint32_t aux_sw_data; + uint32_t aux_sw_control; + uint32_t aux_interrupt_control; + uint32_t aux_sw_status; + } addr; + uint32_t timeout_period; +}; + +struct aux_engine_dce110_init_data { + uint32_t engine_id; + uint32_t timeout_period; + struct dc_context *ctx; + const struct dce110_aux_registers *regs; +}; + +struct aux_engine *dce110_aux_engine_construct( + struct aux_engine_dce110 *aux_engine110, + struct dc_context *ctx, + uint32_t inst, + uint32_t timeout_period, + const struct dce110_aux_registers *regs); + +void dce110_engine_destroy(struct aux_engine **engine); + +bool dce110_aux_engine_acquire( + struct aux_engine *aux_engine, + struct ddc *ddc); +#endif |