diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h | 490 |
1 files changed, 477 insertions, 13 deletions
diff --git a/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h b/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h index 1f5f4e3e49d4..c587b3441e07 100644 --- a/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h +++ b/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h @@ -36,6 +36,9 @@ //<DMUB_TYPES>================================================================== /* Basic type definitions. */ +#ifdef __forceinline +#undef __forceinline +#endif #define __forceinline inline /** @@ -101,6 +104,14 @@ */ #define DMUB_MAX_FPO_STREAMS 4 +/* Define to ensure that the "common" members always appear in the same + * order in different structs for back compat purposes + */ +#define COMMON_STREAM_STATIC_SUB_STATE \ + struct dmub_fams2_cmd_legacy_stream_static_state legacy; \ + struct dmub_fams2_cmd_subvp_stream_static_state subvp; \ + struct dmub_fams2_cmd_drr_stream_static_state drr; + /* Maximum number of streams on any ASIC. */ #define DMUB_MAX_STREAMS 6 @@ -288,6 +299,31 @@ union dmub_addr { } u; /*<< Low/high bit access */ uint64_t quad_part; /*<< 64 bit address */ }; + +/* Flattened structure containing SOC BB parameters stored in the VBIOS + * It is not practical to store the entire bounding box in VBIOS since the bounding box struct can gain new parameters. + * This also prevents alighment issues when new parameters are added to the SoC BB. + * The following parameters should be added since these values can't be obtained elsewhere: + * -dml2_soc_power_management_parameters + * -dml2_soc_vmin_clock_limits + */ +struct dmub_soc_bb_params { + uint32_t dram_clk_change_blackout_ns; + uint32_t dram_clk_change_read_only_ns; + uint32_t dram_clk_change_write_only_ns; + uint32_t fclk_change_blackout_ns; + uint32_t g7_ppt_blackout_ns; + uint32_t stutter_enter_plus_exit_latency_ns; + uint32_t stutter_exit_latency_ns; + uint32_t z8_stutter_enter_plus_exit_latency_ns; + uint32_t z8_stutter_exit_latency_ns; + uint32_t z8_min_idle_time_ns; + uint32_t type_b_dram_clk_change_blackout_ns; + uint32_t type_b_ppt_blackout_ns; + uint32_t vmin_limit_dispclk_khz; + uint32_t vmin_limit_dcfclk_khz; + uint32_t g7_temperature_read_blackout_ns; +}; #pragma pack(pop) /** @@ -547,6 +583,11 @@ union replay_hw_flags { * @is_alpm_initialized: Indicates whether ALPM is initialized */ uint32_t is_alpm_initialized : 1; + + /** + * @alpm_mode: Indicates ALPM mode selected + */ + uint32_t alpm_mode : 2; } bitfields; uint32_t u32All; @@ -739,6 +780,21 @@ enum dmub_ips_disable_type { DMUB_IPS_DISABLE_IPS2_Z10 = 4, DMUB_IPS_DISABLE_DYNAMIC = 5, DMUB_IPS_RCG_IN_ACTIVE_IPS2_IN_OFF = 6, + DMUB_IPS_DISABLE_Z8_RETENTION = 7, +}; + +enum dmub_ips_rcg_disable_type { + DMUB_IPS_RCG_ENABLE = 0, + DMUB_IPS0_RCG_DISABLE = 1, + DMUB_IPS1_RCG_DISABLE = 2, + DMUB_IPS_RCG_DISABLE = 3 +}; + +enum dmub_ips_in_vpb_disable_type { + DMUB_IPS_VPB_RCG_ONLY = 0, // Legacy behaviour + DMUB_IPS_VPB_DISABLE_ALL = 1, + DMUB_IPS_VPB_ENABLE_IPS1_AND_RCG = 2, + DMUB_IPS_VPB_ENABLE_ALL = 3 // Enable IPS1 Z8, IPS1 and RCG }; #define DMUB_IPS1_ALLOW_MASK 0x00000001 @@ -746,6 +802,17 @@ enum dmub_ips_disable_type { #define DMUB_IPS1_COMMIT_MASK 0x00000004 #define DMUB_IPS2_COMMIT_MASK 0x00000008 +enum dmub_ips_comand_type { + /** + * Start/stop IPS residency measurements for a given IPS mode + */ + DMUB_CMD__IPS_RESIDENCY_CNTL = 0, + /** + * Query IPS residency information for a given IPS mode + */ + DMUB_CMD__IPS_QUERY_RESIDENCY_INFO = 1, +}; + /** * union dmub_fw_boot_options - Boot option definitions for SCRATCH14 */ @@ -815,13 +882,14 @@ enum dmub_shared_state_feature_id { /** * struct dmub_shared_state_ips_fw - Firmware signals for IPS. */ -union dmub_shared_state_ips_fw_signals { + union dmub_shared_state_ips_fw_signals { struct { - uint32_t ips1_commit : 1; /**< 1 if in IPS1 */ + uint32_t ips1_commit : 1; /**< 1 if in IPS1 or IPS0 RCG */ uint32_t ips2_commit : 1; /**< 1 if in IPS2 */ uint32_t in_idle : 1; /**< 1 if DMCUB is in idle */ uint32_t detection_required : 1; /**< 1 if detection is required */ - uint32_t reserved_bits : 28; /**< Reversed */ + uint32_t ips1z8_commit: 1; /**< 1 if in IPS1 Z8 Retention */ + uint32_t reserved_bits : 27; /**< Reversed */ } bits; uint32_t all; }; @@ -829,14 +897,19 @@ union dmub_shared_state_ips_fw_signals { /** * struct dmub_shared_state_ips_signals - Firmware signals for IPS. */ -union dmub_shared_state_ips_driver_signals { + union dmub_shared_state_ips_driver_signals { struct { uint32_t allow_pg : 1; /**< 1 if PG is allowed */ uint32_t allow_ips1 : 1; /**< 1 is IPS1 is allowed */ uint32_t allow_ips2 : 1; /**< 1 is IPS1 is allowed */ uint32_t allow_z10 : 1; /**< 1 if Z10 is allowed */ uint32_t allow_idle: 1; /**< 1 if driver is allowing idle */ - uint32_t reserved_bits : 27; /**< Reversed bits */ + uint32_t allow_ips0_rcg : 1; /**< 1 is IPS0 RCG is allowed */ + uint32_t allow_ips1_rcg : 1; /**< 1 is IPS1 RCG is allowed */ + uint32_t allow_ips1z8 : 1; /**< 1 is IPS1 Z8 Retention is allowed */ + uint32_t allow_dynamic_ips1 : 1; /**< 1 if IPS1 is allowed in dynamic use cases such as VPB */ + uint32_t allow_dynamic_ips1_z8: 1; /**< 1 if IPS1 z8 ret is allowed in dynamic use cases such as VPB */ + uint32_t reserved_bits : 22; /**< Reversed bits */ } bits; uint32_t all; }; @@ -865,7 +938,9 @@ struct dmub_shared_state_ips_fw { uint32_t ips1_exit_count; /**< Exit counter for IPS1 */ uint32_t ips2_entry_count; /**< Entry counter for IPS2 */ uint32_t ips2_exit_count; /**< Exit counter for IPS2 */ - uint32_t reserved[55]; /**< Reversed, to be updated when adding new fields. */ + uint32_t ips1_z8ret_entry_count; /**< Entry counter for IPS1 Z8 Retention */ + uint32_t ips1_z8ret_exit_count; /**< Exit counter for IPS1 Z8 Retention */ + uint32_t reserved[53]; /**< Reversed, to be updated when adding new fields. */ }; /* 248-bytes, fixed */ /** @@ -1253,6 +1328,10 @@ enum dmub_gpint_command { * DESC: Setup debug configs. */ DMUB_GPINT__SETUP_DEBUG_MODE = 136, + /** + * DESC: Initiates IPS wake sequence. + */ + DMUB_GPINT__IPS_DEBUG_WAKE = 137, }; /** @@ -1482,6 +1561,16 @@ enum dmub_cmd_type { */ DMUB_CMD__FUSED_IO = 89, + /** + * Command type used for all LSDMA commands. + */ + DMUB_CMD__LSDMA = 90, + + /** + * Command type use for all IPS commands. + */ + DMUB_CMD__IPS = 91, + DMUB_CMD__VBIOS = 128, }; @@ -1892,6 +1981,121 @@ struct dmub_rb_cmd_fams2_flip { struct dmub_fams2_flip_info flip_info; }; +struct dmub_cmd_lsdma_data { + union { + struct lsdma_init_data { + union dmub_addr gpu_addr_base; + uint32_t ring_size; + } init_data; + struct lsdma_tiled_copy_data { + uint32_t src_addr_lo; + uint32_t src_addr_hi; + uint32_t dst_addr_lo; + uint32_t dst_addr_hi; + + uint32_t src_x : 16; + uint32_t src_y : 16; + + uint32_t src_width : 16; + uint32_t src_height : 16; + + uint32_t dst_x : 16; + uint32_t dst_y : 16; + + uint32_t dst_width : 16; + uint32_t dst_height : 16; + + uint32_t rect_x : 16; + uint32_t rect_y : 16; + + uint32_t src_swizzle_mode : 5; + uint32_t src_mip_max : 5; + uint32_t src_mip_id : 5; + uint32_t dst_mip_max : 5; + uint32_t dst_swizzle_mode : 5; + uint32_t dst_mip_id : 5; + uint32_t tmz : 1; + uint32_t dcc : 1; + + uint32_t data_format : 6; + uint32_t padding1 : 4; + uint32_t dst_element_size : 3; + uint32_t num_type : 3; + uint32_t src_element_size : 3; + uint32_t write_compress : 2; + uint32_t cache_policy_dst : 2; + uint32_t cache_policy_src : 2; + uint32_t read_compress : 2; + uint32_t src_dim : 2; + uint32_t dst_dim : 2; + uint32_t max_uncom : 1; + + uint32_t max_com : 2; + uint32_t padding : 30; + } tiled_copy_data; + struct lsdma_linear_copy_data { + uint32_t count : 30; + uint32_t cache_policy_dst : 2; + + uint32_t tmz : 1; + uint32_t cache_policy_src : 2; + uint32_t padding : 29; + + uint32_t src_lo; + uint32_t src_hi; + uint32_t dst_lo; + uint32_t dst_hi; + } linear_copy_data; + struct lsdma_reg_write_data { + uint32_t reg_addr; + uint32_t reg_data; + } reg_write_data; + struct lsdma_pio_copy_data { + union { + struct { + uint32_t byte_count : 26; + uint32_t src_loc : 1; + uint32_t dst_loc : 1; + uint32_t src_addr_inc : 1; + uint32_t dst_addr_inc : 1; + uint32_t overlap_disable : 1; + uint32_t constant_fill : 1; + } fields; + uint32_t raw; + } packet; + uint32_t src_lo; + uint32_t src_hi; + uint32_t dst_lo; + uint32_t dst_hi; + } pio_copy_data; + struct lsdma_pio_constfill_data { + union { + struct { + uint32_t byte_count : 26; + uint32_t src_loc : 1; + uint32_t dst_loc : 1; + uint32_t src_addr_inc : 1; + uint32_t dst_addr_inc : 1; + uint32_t overlap_disable : 1; + uint32_t constant_fill : 1; + } fields; + uint32_t raw; + } packet; + uint32_t dst_lo; + uint32_t dst_hi; + uint32_t data; + } pio_constfill_data; + + uint32_t all[14]; + } u; + +}; + +struct dmub_rb_cmd_lsdma { + struct dmub_cmd_header header; + struct dmub_cmd_lsdma_data lsdma_data; +}; + struct dmub_optc_state_v2 { uint32_t v_total_min; uint32_t v_total_max; @@ -1923,6 +2127,28 @@ enum fams2_stream_type { FAMS2_STREAM_TYPE_SUBVP = 4, }; +struct dmub_rect16 { + /** + * Dirty rect x offset. + */ + uint16_t x; + + /** + * Dirty rect y offset. + */ + uint16_t y; + + /** + * Dirty rect width. + */ + uint16_t width; + + /** + * Dirty rect height. + */ + uint16_t height; +}; + /* static stream state */ struct dmub_fams2_legacy_stream_static_state { uint8_t vactive_det_fill_delay_otg_vlines; @@ -1995,11 +2221,13 @@ union dmub_fams2_stream_static_sub_state { }; //v0 union dmub_fams2_cmd_stream_static_sub_state { - struct dmub_fams2_cmd_legacy_stream_static_state legacy; - struct dmub_fams2_cmd_subvp_stream_static_state subvp; - struct dmub_fams2_cmd_drr_stream_static_state drr; + COMMON_STREAM_STATIC_SUB_STATE }; //v1 +union dmub_fams2_stream_static_sub_state_v2 { + COMMON_STREAM_STATIC_SUB_STATE +}; //v2 + struct dmub_fams2_stream_static_state { enum fams2_stream_type type; uint32_t otg_vline_time_ns; @@ -2065,7 +2293,7 @@ struct dmub_fams2_cmd_stream_static_base_state { struct dmub_fams2_stream_static_state_v1 { struct dmub_fams2_cmd_stream_static_base_state base; - union dmub_fams2_cmd_stream_static_sub_state sub_state; + union dmub_fams2_stream_static_sub_state_v2 sub_state; }; //v1 /** @@ -2113,6 +2341,11 @@ union dmub_cmd_fams2_config { } stream_v1; //v1 }; +struct dmub_fams2_config_v2 { + struct dmub_cmd_fams2_global_config global; + struct dmub_fams2_stream_static_state_v1 stream_v1[DMUB_MAX_STREAMS]; //v1 +}; + /** * DMUB rb command definition for FAMS2 (merged SubVP, FPO, Legacy) */ @@ -2122,6 +2355,22 @@ struct dmub_rb_cmd_fams2 { }; /** + * Indirect buffer descriptor + */ +struct dmub_ib_data { + union dmub_addr src; // location of indirect buffer in memory + uint16_t size; // indirect buffer size in bytes +}; + +/** + * DMUB rb command definition for commands passed over indirect buffer + */ +struct dmub_rb_cmd_ib { + struct dmub_cmd_header header; + struct dmub_ib_data ib_data; +}; + +/** * enum dmub_cmd_idle_opt_type - Idle optimization command type. */ enum dmub_cmd_idle_opt_type { @@ -2144,6 +2393,11 @@ enum dmub_cmd_idle_opt_type { * DCN hardware notify power state. */ DMUB_CMD__IDLE_OPT_SET_DC_POWER_STATE = 3, + + /** + * DCN notify to release HW. + */ + DMUB_CMD__IDLE_OPT_RELEASE_HW = 4, }; /** @@ -2289,7 +2543,8 @@ struct dmub_dig_transmitter_control_data_v1_7 { uint8_t connobj_id; /**< Connector Object Id defined in ObjectId.h */ uint8_t HPO_instance; /**< HPO instance (0: inst0, 1: inst1) */ uint8_t reserved1; /**< For future use */ - uint8_t reserved2[3]; /**< For future use */ + uint8_t skip_phy_ssc_reduction; + uint8_t reserved2[2]; /**< For future use */ uint32_t reserved3[11]; /**< For future use */ }; @@ -2636,7 +2891,11 @@ enum dp_hpd_type { /** * DP HPD short pulse */ - DP_IRQ + DP_IRQ = 1, + /** + * Failure to acquire DP HPD state + */ + DP_NONE_HPD = 2 }; /** @@ -2903,6 +3162,7 @@ enum dmub_cmd_fams_type { DMUB_CMD__FAMS2_CONFIG = 4, DMUB_CMD__FAMS2_DRR_UPDATE = 5, DMUB_CMD__FAMS2_FLIP = 6, + DMUB_CMD__FAMS2_IB_CONFIG = 7, }; /** @@ -3609,6 +3869,12 @@ struct dmub_rb_cmd_psr_set_power_opt { struct dmub_cmd_psr_set_power_opt_data psr_set_power_opt_data; }; +enum dmub_alpm_mode { + ALPM_AUXWAKE = 0, + ALPM_AUXLESS = 1, + ALPM_UNSUPPORTED = 2, +}; + /** * Definition of Replay Residency GPINT command. * Bit[0] - Residency mode for Revision 0 @@ -3742,6 +4008,15 @@ enum dmub_cmd_replay_general_subtype { REPLAY_GENERAL_CMD_SET_LOW_RR_ACTIVATE, }; +struct dmub_alpm_auxless_data { + uint16_t lfps_setup_ns; + uint16_t lfps_period_ns; + uint16_t lfps_silence_ns; + uint16_t lfps_t1_t2_override_us; + short lfps_t1_t2_offset_us; + uint8_t lttpr_count; +}; + /** * Data passed from driver to FW in a DMUB_CMD__REPLAY_COPY_SETTINGS command. */ @@ -3773,6 +4048,14 @@ struct dmub_cmd_replay_copy_settings_data { */ uint8_t digbe_inst; /** + * @hpo_stream_enc_inst: HPO stream encoder instance + */ + uint8_t hpo_stream_enc_inst; + /** + * @hpo_link_enc_inst: HPO link encoder instance + */ + uint8_t hpo_link_enc_inst; + /** * AUX HW instance. */ uint8_t aux_inst; @@ -3812,6 +4095,15 @@ struct dmub_cmd_replay_copy_settings_data { * Use FSM state for Replay power up/down */ uint8_t use_phy_fsm; + /** + * Use for AUX-less ALPM LFPS wake operation + */ + struct dmub_alpm_auxless_data auxless_alpm_data; + + /** + * @pad: Align structure to 4 byte boundary. + */ + uint8_t pad[2]; }; /** @@ -3867,6 +4159,18 @@ struct dmub_rb_cmd_replay_enable_data { * This does not support HDMI/DP2 for now. */ uint8_t phy_rate; + /** + * @hpo_stream_enc_inst: HPO stream encoder instance + */ + uint8_t hpo_stream_enc_inst; + /** + * @hpo_link_enc_inst: HPO link encoder instance + */ + uint8_t hpo_link_enc_inst; + /** + * @pad: Align structure to 4 byte boundary. + */ + uint8_t pad[2]; }; /** @@ -4360,6 +4664,42 @@ enum dmub_cmd_abm_type { * Get the current ACE curve. */ DMUB_CMD__ABM_GET_ACE_CURVE = 10, + + /** + * Get current histogram data + */ + DMUB_CMD__ABM_GET_HISTOGRAM_DATA = 11, +}; + +/** + * LSDMA command sub-types. + */ +enum dmub_cmd_lsdma_type { + /** + * Initialize parameters for LSDMA. + * Ring buffer is mapped to the ring buffer + */ + DMUB_CMD__LSDMA_INIT_CONFIG = 0, + /** + * LSDMA copies data from source to destination linearly + */ + DMUB_CMD__LSDMA_LINEAR_COPY = 1, + /** + * Send the tiled-to-tiled copy command + */ + DMUB_CMD__LSDMA_TILED_TO_TILED_COPY = 2, + /** + * Send the poll reg write command + */ + DMUB_CMD__LSDMA_POLL_REG_WRITE = 3, + /** + * Send the pio copy command + */ + DMUB_CMD__LSDMA_PIO_COPY = 4, + /** + * Send the pio constfill command + */ + DMUB_CMD__LSDMA_PIO_CONSTFILL = 5, }; struct abm_ace_curve { @@ -4954,6 +5294,20 @@ enum dmub_abm_ace_curve_type { }; /** + * enum dmub_abm_histogram_type - Histogram type. + */ +enum dmub_abm_histogram_type { + /** + * ACE curve as defined by the SW layer. + */ + ABM_HISTOGRAM_TYPE__SW = 0, + /** + * ACE curve as defined by the SW to HW translation interface layer. + */ + ABM_HISTOGRAM_TYPE__SW_IF = 1, +}; + +/** * Definition of a DMUB_CMD__ABM_GET_ACE_CURVE command. */ struct dmub_rb_cmd_abm_get_ace_curve { @@ -4989,6 +5343,41 @@ struct dmub_rb_cmd_abm_get_ace_curve { }; /** + * Definition of a DMUB_CMD__ABM_GET_HISTOGRAM command. + */ +struct dmub_rb_cmd_abm_get_histogram { + /** + * Command header. + */ + struct dmub_cmd_header header; + + /** + * Address where Histogram should be copied. + */ + union dmub_addr dest; + + /** + * Type of Histogram being queried. + */ + enum dmub_abm_histogram_type histogram_type; + + /** + * Indirect buffer length. + */ + uint16_t bytes; + + /** + * eDP panel instance. + */ + uint8_t panel_inst; + + /** + * Explicit padding to 4 byte boundary. + */ + uint8_t pad; +}; + +/** * Definition of a DMUB_CMD__ABM_SAVE_RESTORE command. */ struct dmub_rb_cmd_abm_save_restore { @@ -5389,7 +5778,8 @@ struct dmub_cmd_fused_request { struct dmub_cmd_fused_request_location_i2c { uint8_t is_aux : 1; // False uint8_t ddc_line : 3; - uint8_t _reserved0 : 4; + uint8_t over_aux : 1; + uint8_t _reserved0 : 3; uint8_t address; uint8_t offset; uint8_t length; @@ -5517,6 +5907,59 @@ struct dmub_rb_cmd_assr_enable { }; /** + * Current definition of "ips_mode" from driver + */ +enum ips_residency_mode { + IPS_RESIDENCY__IPS1_MAX, + IPS_RESIDENCY__IPS2, + IPS_RESIDENCY__IPS1_RCG, + IPS_RESIDENCY__IPS1_ONO2_ON, +}; + +#define NUM_IPS_HISTOGRAM_BUCKETS 16 + +/** + * IPS residency statistics to be sent to driver - subset of struct dmub_ips_residency_stats + */ +struct dmub_ips_residency_info { + uint32_t residency_millipercent; + uint32_t entry_counter; + uint32_t histogram[NUM_IPS_HISTOGRAM_BUCKETS]; + uint64_t total_time_us; + uint64_t total_inactive_time_us; +}; + +/** + * Data passed from driver to FW in a DMUB_CMD__IPS_RESIDENCY_CNTL command. + */ +struct dmub_cmd_ips_residency_cntl_data { + uint8_t panel_inst; + uint8_t start_measurement; + uint8_t padding[2]; // align to 4-byte boundary +}; + +struct dmub_rb_cmd_ips_residency_cntl { + struct dmub_cmd_header header; + struct dmub_cmd_ips_residency_cntl_data cntl_data; +}; + +/** + * Data passed from FW to driver in a DMUB_CMD__IPS_QUERY_RESIDENCY_INFO command. + */ +struct dmub_cmd_ips_query_residency_info_data { + union dmub_addr dest; + uint32_t size; + uint32_t ips_mode; + uint8_t panel_inst; + uint8_t padding[3]; // align to 4-byte boundary +}; + +struct dmub_rb_cmd_ips_query_residency_info { + struct dmub_cmd_header header; + struct dmub_cmd_ips_query_residency_info_data info_data; +}; + +/** * union dmub_rb_cmd - DMUB inbox command. */ union dmub_rb_cmd { @@ -5687,6 +6130,11 @@ union dmub_rb_cmd { struct dmub_rb_cmd_abm_get_ace_curve abm_get_ace_curve; /** + * Definition of a DMUB_CMD__ABM_GET_HISTOGRAM command. + */ + struct dmub_rb_cmd_abm_get_histogram abm_get_histogram; + + /** * Definition of a DMUB_CMD__ABM_SET_EVENT command. */ struct dmub_rb_cmd_abm_set_event abm_set_event; @@ -5817,13 +6265,25 @@ union dmub_rb_cmd { * Definition of a DMUB_CMD__PSP_ASSR_ENABLE command. */ struct dmub_rb_cmd_assr_enable assr_enable; + struct dmub_rb_cmd_fams2 fams2_config; + struct dmub_rb_cmd_ib ib_fams2_config; + struct dmub_rb_cmd_fams2_drr_update fams2_drr_update; struct dmub_rb_cmd_fams2_flip fams2_flip; struct dmub_rb_cmd_fused_io fused_io; + + /** + * Definition of a DMUB_CMD__LSDMA command. + */ + struct dmub_rb_cmd_lsdma lsdma; + + struct dmub_rb_cmd_ips_residency_cntl ips_residency_cntl; + + struct dmub_rb_cmd_ips_query_residency_info ips_query_residency_info; }; /** @@ -5934,6 +6394,9 @@ static inline uint32_t dmub_rb_num_free(struct dmub_rb *rb) else data_count = rb->capacity - (rb->rptr - rb->wrpt); + /* +1 because 1 entry is always unusable */ + data_count += DMUB_RB_CMD_SIZE; + return (rb->capacity - data_count) / DMUB_RB_CMD_SIZE; } @@ -5953,6 +6416,7 @@ static inline bool dmub_rb_full(struct dmub_rb *rb) else data_count = rb->capacity - (rb->rptr - rb->wrpt); + /* -1 because 1 entry is always unusable */ return (data_count == (rb->capacity - DMUB_RB_CMD_SIZE)); } |