From: Wenjing Liu <[email protected]> [why] When display is connected with a native DP port, DP2 mode register value is a don't care. Driver mistakenly reduce max supported lane count to 2 lane based on the don't care value.
[how] Add additional check only if USB C DP alt mode is enabled, we will determine max lane count supported based on current mode. Signed-off-by: Wenjing Liu <[email protected]> Reviewed-by: Aric Cyr <[email protected]> Acked-by: Rodrigo Siqueira <[email protected]> --- drivers/gpu/drm/amd/display/dc/core/dc_link.c | 4 +- .../gpu/drm/amd/display/dc/core/dc_link_dp.c | 15 +---- .../drm/amd/display/dc/dce/dce_link_encoder.c | 20 ++++++- .../drm/amd/display/dc/dce/dce_link_encoder.h | 3 + .../amd/display/dc/dcn10/dcn10_link_encoder.c | 20 ++++++- .../amd/display/dc/dcn10/dcn10_link_encoder.h | 3 + .../amd/display/dc/dcn20/dcn20_link_encoder.c | 60 ++++++++++++------- .../amd/display/dc/dcn20/dcn20_link_encoder.h | 4 ++ .../amd/display/dc/dcn21/dcn21_link_encoder.c | 27 +-------- .../display/dc/virtual/virtual_link_encoder.c | 9 +++ 10 files changed, 101 insertions(+), 64 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c index 574612ddd5d2..fb25475101cc 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c @@ -686,7 +686,7 @@ static bool is_same_edid(struct dc_edid *old_edid, struct dc_edid *new_edid) return (memcmp(old_edid->raw_edid, new_edid->raw_edid, new_edid->length) == 0); } -static bool wait_for_alt_mode(struct dc_link *link) +static bool wait_for_entering_dp_alt_mode(struct dc_link *link) { /** @@ -843,7 +843,7 @@ static bool dc_link_detect_helper(struct dc_link *link, if (link->link_enc->features.flags.bits.DP_IS_USB_C == 1) { /* if alt mode times out, return false */ - if (wait_for_alt_mode(link) == false) { + if (wait_for_entering_dp_alt_mode(link) == false) { return false; } } diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c index 7cbb1efb4f68..74cf06aacd6c 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c @@ -1710,19 +1710,10 @@ bool dc_link_dp_sync_lt_end(struct dc_link *link, bool link_down) static struct dc_link_settings get_max_link_cap(struct dc_link *link) { - /* Set Default link settings */ - struct dc_link_settings max_link_cap = {LANE_COUNT_FOUR, LINK_RATE_HIGH, - LINK_SPREAD_05_DOWNSPREAD_30KHZ, false, 0}; - - /* Higher link settings based on feature supported */ - if (link->link_enc->features.flags.bits.IS_HBR2_CAPABLE) - max_link_cap.link_rate = LINK_RATE_HIGH2; - - if (link->link_enc->features.flags.bits.IS_HBR3_CAPABLE) - max_link_cap.link_rate = LINK_RATE_HIGH3; + struct dc_link_settings max_link_cap = {0}; - if (link->link_enc->funcs->get_max_link_cap) - link->link_enc->funcs->get_max_link_cap(link->link_enc, &max_link_cap); + /* get max link encoder capability */ + link->link_enc->funcs->get_max_link_cap(link->link_enc, &max_link_cap); /* Lower link settings based on sink's link cap */ if (link->reported_link_cap.lane_count < max_link_cap.lane_count) diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c b/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c index 8527cce81c6f..8d8c84c81b34 100644 --- a/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c +++ b/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c @@ -118,7 +118,8 @@ static const struct link_encoder_funcs dce110_lnk_enc_funcs = { .enable_hpd = dce110_link_encoder_enable_hpd, .disable_hpd = dce110_link_encoder_disable_hpd, .is_dig_enabled = dce110_is_dig_enabled, - .destroy = dce110_link_encoder_destroy + .destroy = dce110_link_encoder_destroy, + .get_max_link_cap = dce110_link_encoder_get_max_link_cap }; static enum bp_result link_transmitter_control( @@ -1389,3 +1390,20 @@ void dce110_link_encoder_disable_hpd(struct link_encoder *enc) set_reg_field_value(value, 0, DC_HPD_CONTROL, DC_HPD_EN); } + +void dce110_link_encoder_get_max_link_cap(struct link_encoder *enc, + struct dc_link_settings *link_settings) +{ + /* Set Default link settings */ + struct dc_link_settings max_link_cap = {LANE_COUNT_FOUR, LINK_RATE_HIGH, + LINK_SPREAD_05_DOWNSPREAD_30KHZ, false, 0}; + + /* Higher link settings based on feature supported */ + if (enc->features.flags.bits.IS_HBR2_CAPABLE) + max_link_cap.link_rate = LINK_RATE_HIGH2; + + if (enc->features.flags.bits.IS_HBR3_CAPABLE) + max_link_cap.link_rate = LINK_RATE_HIGH3; + + *link_settings = max_link_cap; +} diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.h b/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.h index 3c9368df4093..384389f0e2c3 100644 --- a/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.h +++ b/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.h @@ -271,4 +271,7 @@ void dce110_psr_program_secondary_packet(struct link_encoder *enc, bool dce110_is_dig_enabled(struct link_encoder *enc); +void dce110_link_encoder_get_max_link_cap(struct link_encoder *enc, + struct dc_link_settings *link_settings); + #endif /* __DC_LINK_ENCODER__DCE110_H__ */ diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_link_encoder.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_link_encoder.c index d3617d6785a7..7fd385be3f3d 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_link_encoder.c +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_link_encoder.c @@ -90,7 +90,8 @@ static const struct link_encoder_funcs dcn10_lnk_enc_funcs = { .is_dig_enabled = dcn10_is_dig_enabled, .get_dig_frontend = dcn10_get_dig_frontend, .get_dig_mode = dcn10_get_dig_mode, - .destroy = dcn10_link_encoder_destroy + .destroy = dcn10_link_encoder_destroy, + .get_max_link_cap = dcn10_link_encoder_get_max_link_cap, }; static enum bp_result link_transmitter_control( @@ -1370,7 +1371,6 @@ void dcn10_link_encoder_disable_hpd(struct link_encoder *enc) DC_HPD_EN, 0); } - #define AUX_REG(reg)\ (enc10->aux_regs->reg) @@ -1425,3 +1425,19 @@ enum signal_type dcn10_get_dig_mode( return SIGNAL_TYPE_NONE; } +void dcn10_link_encoder_get_max_link_cap(struct link_encoder *enc, + struct dc_link_settings *link_settings) +{ + /* Set Default link settings */ + struct dc_link_settings max_link_cap = {LANE_COUNT_FOUR, LINK_RATE_HIGH, + LINK_SPREAD_05_DOWNSPREAD_30KHZ, false, 0}; + + /* Higher link settings based on feature supported */ + if (enc->features.flags.bits.IS_HBR2_CAPABLE) + max_link_cap.link_rate = LINK_RATE_HIGH2; + + if (enc->features.flags.bits.IS_HBR3_CAPABLE) + max_link_cap.link_rate = LINK_RATE_HIGH3; + + *link_settings = max_link_cap; +} diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_link_encoder.h b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_link_encoder.h index 762109174fb8..68395bcc24fd 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_link_encoder.h +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_link_encoder.h @@ -575,4 +575,7 @@ void dcn10_aux_initialize(struct dcn10_link_encoder *enc10); enum signal_type dcn10_get_dig_mode( struct link_encoder *enc); + +void dcn10_link_encoder_get_max_link_cap(struct link_encoder *enc, + struct dc_link_settings *link_settings); #endif /* __DC_LINK_ENCODER__DCN10_H__ */ 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 15d513b79667..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) @@ -311,28 +349,6 @@ void enc2_hw_init(struct link_encoder *enc) dcn10_aux_initialize(enc10); } -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 value; - - REG_GET(RDPCSTX_PHY_CNTL6, RDPCS_PHY_DPALT_DP4, &value); - - if (!value && link_settings->lane_count > LANE_COUNT_TWO) - link_settings->lane_count = LANE_COUNT_TWO; -} -bool dcn20_link_encoder_is_in_alt_mode(struct link_encoder *enc) -{ - struct dcn10_link_encoder *enc10 = TO_DCN10_LINK_ENC(enc); - uint32_t value; - - REG_GET(RDPCSTX_PHY_CNTL6, RDPCS_PHY_DPALT_DISABLE, &value); - - // if value == 1 alt mode is disabled, otherwise it is enabled - return !value; -} - static const struct link_encoder_funcs dcn20_link_enc_funcs = { .read_state = link_enc2_read_state, .validate_output_with_stream = diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_link_encoder.h b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_link_encoder.h index 8cab8107fd94..284a1ee4d249 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_link_encoder.h +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_link_encoder.h @@ -343,6 +343,10 @@ void dcn20_link_encoder_enable_dp_output( const struct dc_link_settings *link_settings, enum clock_source_id clock_source); +bool dcn20_link_encoder_is_in_alt_mode(struct link_encoder *enc); +void dcn20_link_encoder_get_max_link_cap(struct link_encoder *enc, + struct dc_link_settings *link_settings); + void dcn20_link_encoder_construct( struct dcn20_link_encoder *enc20, const struct encoder_init_data *init_data, diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_link_encoder.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_link_encoder.c index e45683ac871a..aa46c35b05a2 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_link_encoder.c +++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_link_encoder.c @@ -203,29 +203,6 @@ static bool update_cfg_data( return true; } -void dcn21_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 value; - - REG_GET(RDPCSTX_PHY_CNTL6, RDPCS_PHY_DPALT_DP4, &value); - - if (!value && link_settings->lane_count > LANE_COUNT_TWO) - link_settings->lane_count = LANE_COUNT_TWO; -} - -bool dcn21_link_encoder_is_in_alt_mode(struct link_encoder *enc) -{ - struct dcn10_link_encoder *enc10 = TO_DCN10_LINK_ENC(enc); - uint32_t value; - - REG_GET(RDPCSTX_PHY_CNTL6, RDPCS_PHY_DPALT_DISABLE, &value); - - // if value == 1 alt mode is disabled, otherwise it is enabled - return !value; -} - bool dcn21_link_encoder_acquire_phy(struct link_encoder *enc) { struct dcn10_link_encoder *enc10 = TO_DCN10_LINK_ENC(enc); @@ -348,8 +325,8 @@ static const struct link_encoder_funcs dcn21_link_enc_funcs = { .fec_set_ready = enc2_fec_set_ready, .fec_is_active = enc2_fec_is_active, .get_dig_frontend = dcn10_get_dig_frontend, - .is_in_alt_mode = dcn21_link_encoder_is_in_alt_mode, - .get_max_link_cap = dcn21_link_encoder_get_max_link_cap, + .is_in_alt_mode = dcn20_link_encoder_is_in_alt_mode, + .get_max_link_cap = dcn20_link_encoder_get_max_link_cap, }; void dcn21_link_encoder_construct( diff --git a/drivers/gpu/drm/amd/display/dc/virtual/virtual_link_encoder.c b/drivers/gpu/drm/amd/display/dc/virtual/virtual_link_encoder.c index 3464b2d5b89a..348e9a600a72 100644 --- a/drivers/gpu/drm/amd/display/dc/virtual/virtual_link_encoder.c +++ b/drivers/gpu/drm/amd/display/dc/virtual/virtual_link_encoder.c @@ -84,6 +84,14 @@ static void virtual_link_encoder_destroy(struct link_encoder **enc) *enc = NULL; } +static void virtual_link_encoder_get_max_link_cap(struct link_encoder *enc, + struct dc_link_settings *link_settings) +{ + /* Set Default link settings */ + struct dc_link_settings max_link_cap = {LANE_COUNT_FOUR, LINK_RATE_HIGH, + LINK_SPREAD_05_DOWNSPREAD_30KHZ, false, 0}; + *link_settings = max_link_cap; +} static const struct link_encoder_funcs virtual_lnk_enc_funcs = { .validate_output_with_stream = @@ -94,6 +102,7 @@ static const struct link_encoder_funcs virtual_lnk_enc_funcs = { .enable_dp_output = virtual_link_encoder_enable_dp_output, .enable_dp_mst_output = virtual_link_encoder_enable_dp_mst_output, .disable_output = virtual_link_encoder_disable_output, + .get_max_link_cap = virtual_link_encoder_get_max_link_cap, .dp_set_lane_settings = virtual_link_encoder_dp_set_lane_settings, .dp_set_phy_pattern = virtual_link_encoder_dp_set_phy_pattern, .update_mst_stream_allocation_table = -- 2.26.0 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
