diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dcn20/dcn20_link_encoder.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dcn20/dcn20_link_encoder.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_link_encoder.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_link_encoder.c index e4ac73035c84..8d209dae66e6 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_link_encoder.c +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_link_encoder.c @@ -49,6 +49,12 @@ #define IND_REG(index) \ (enc10->link_regs->index) +#ifndef MAX +#define MAX(X, Y) ((X) > (Y) ? (X) : (Y)) +#endif +#ifndef MIN +#define MIN(X, Y) ((X) < (Y) ? (X) : (Y)) +#endif static struct mpll_cfg dcn2_mpll_cfg[] = { // RBR @@ -260,6 +266,38 @@ void dcn20_link_encoder_enable_dp_output( } +void dcn20_link_encoder_get_max_link_cap(struct link_encoder *enc, + struct dc_link_settings *link_settings) +{ + struct dcn10_link_encoder *enc10 = TO_DCN10_LINK_ENC(enc); + uint32_t is_in_usb_c_dp4_mode = 0; + + dcn10_link_encoder_get_max_link_cap(enc, link_settings); + + /* in usb c dp2 mode, max lane count is 2 */ + if (enc->funcs->is_in_alt_mode && enc->funcs->is_in_alt_mode(enc)) { + REG_GET(RDPCSTX_PHY_CNTL6, RDPCS_PHY_DPALT_DP4, &is_in_usb_c_dp4_mode); + if (!is_in_usb_c_dp4_mode) + link_settings->lane_count = MIN(LANE_COUNT_TWO, link_settings->lane_count); + } + +} + +bool dcn20_link_encoder_is_in_alt_mode(struct link_encoder *enc) +{ + struct dcn10_link_encoder *enc10 = TO_DCN10_LINK_ENC(enc); + uint32_t dp_alt_mode_disable = 0; + bool is_usb_c_alt_mode = false; + + if (enc->features.flags.bits.DP_IS_USB_C) { + /* if value == 1 alt mode is disabled, otherwise it is enabled */ + REG_GET(RDPCSTX_PHY_CNTL6, RDPCS_PHY_DPALT_DISABLE, &dp_alt_mode_disable); + is_usb_c_alt_mode = (dp_alt_mode_disable == 0); + } + + return is_usb_c_alt_mode; +} + #define AUX_REG(reg)\ (enc10->aux_regs->reg) @@ -338,6 +376,8 @@ static const struct link_encoder_funcs dcn20_link_enc_funcs = { .fec_is_active = enc2_fec_is_active, .get_dig_mode = dcn10_get_dig_mode, .get_dig_frontend = dcn10_get_dig_frontend, + .is_in_alt_mode = dcn20_link_encoder_is_in_alt_mode, + .get_max_link_cap = dcn20_link_encoder_get_max_link_cap, }; void dcn20_link_encoder_construct( |