[PATCH 5.14 010/151] drm/amd/display: Fix B0 USB-C DP Alt mode

From: Greg Kroah-Hartman
Date: Mon Oct 11 2021 - 09:59:20 EST

From: Liu, Zhan <Zhan.Liu@xxxxxxx>

commit 45d65c0f09aaa6cdd21fe0743f317d4bbdfd1466 upstream.

[Why]
Starting from B0, along with RDPCSTX, RDPCSPIPE registers are also used.

[How]
Make sure RDPCSPIPE registers are programmed correctly.

Reviewed-by: Charlene Liu <charlene.liu@xxxxxxx>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@xxxxxxx>
Signed-off-by: Zhan Liu <Zhan.Liu@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
(cherry picked from commit bdd1a21b52557ea8f61d0a5dc2f77151b576eb70)
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_link_encoder.h | 1
drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dio_link_encoder.c | 33 +++++++++-
drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dio_link_encoder.h | 11 +++
drivers/gpu/drm/amd/include/asic_reg/dpcs/dpcs_4_2_0_offset.h | 27 ++++++++
4 files changed, 70 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_link_encoder.h
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_link_encoder.h
@@ -118,6 +118,7 @@ struct dcn10_link_enc_registers {
uint32_t RDPCSTX_PHY_CNTL4;
uint32_t RDPCSTX_PHY_CNTL5;
uint32_t RDPCSTX_PHY_CNTL6;
+ uint32_t RDPCSPIPE_PHY_CNTL6;
uint32_t RDPCSTX_PHY_CNTL7;
uint32_t RDPCSTX_PHY_CNTL8;
uint32_t RDPCSTX_PHY_CNTL9;
--- a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dio_link_encoder.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dio_link_encoder.c
@@ -37,6 +37,7 @@

#include "link_enc_cfg.h"
#include "dc_dmub_srv.h"
+#include "dal_asic_id.h"

#define CTX \
enc10->base.ctx
@@ -215,7 +216,7 @@ static const struct link_encoder_funcs d
.fec_is_active = enc2_fec_is_active,
.get_dig_frontend = dcn10_get_dig_frontend,
.get_dig_mode = dcn10_get_dig_mode,
- .is_in_alt_mode = dcn20_link_encoder_is_in_alt_mode,
+ .is_in_alt_mode = dcn31_link_encoder_is_in_alt_mode,
.get_max_link_cap = dcn20_link_encoder_get_max_link_cap,
.set_dio_phy_mux = dcn31_link_encoder_set_dio_phy_mux,
};
@@ -404,3 +405,33 @@ void dcn31_link_encoder_disable_output(
}
}

+bool dcn31_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;
+ bool is_usb_c_alt_mode = false;
+
+ if (enc->features.flags.bits.DP_IS_USB_C) {
+ if (enc->ctx->asic_id.hw_internal_rev != YELLOW_CARP_B0) {
+ // [Note] no need to check hw_internal_rev once phy mux selection is ready
+ REG_GET(RDPCSTX_PHY_CNTL6, RDPCS_PHY_DPALT_DISABLE, &dp_alt_mode_disable);
+ } else {
+ /*
+ * B0 phys use a new set of registers to check whether alt mode is disabled.
+ * if value == 1 alt mode is disabled, otherwise it is enabled.
+ */
+ if ((enc10->base.transmitter == TRANSMITTER_UNIPHY_A)
+ || (enc10->base.transmitter == TRANSMITTER_UNIPHY_B)
+ || (enc10->base.transmitter == TRANSMITTER_UNIPHY_E)) {
+ REG_GET(RDPCSTX_PHY_CNTL6, RDPCS_PHY_DPALT_DISABLE, &dp_alt_mode_disable);
+ } else {
+ // [Note] need to change TRANSMITTER_UNIPHY_C/D to F/G once phy mux selection is ready
+ REG_GET(RDPCSPIPE_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;
+}
--- a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dio_link_encoder.h
+++ b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dio_link_encoder.h
@@ -69,6 +69,7 @@
SRI(RDPCSTX_PHY_CNTL4, RDPCSTX, id), \
SRI(RDPCSTX_PHY_CNTL5, RDPCSTX, id), \
SRI(RDPCSTX_PHY_CNTL6, RDPCSTX, id), \
+ SRI(RDPCSPIPE_PHY_CNTL6, RDPCSPIPE, id), \
SRI(RDPCSTX_PHY_CNTL7, RDPCSTX, id), \
SRI(RDPCSTX_PHY_CNTL8, RDPCSTX, id), \
SRI(RDPCSTX_PHY_CNTL9, RDPCSTX, id), \
@@ -115,7 +116,9 @@
LE_SF(RDPCSTX0_RDPCSTX_PHY_CNTL6, RDPCS_PHY_DP_TX2_MPLL_EN, mask_sh),\
LE_SF(RDPCSTX0_RDPCSTX_PHY_CNTL6, RDPCS_PHY_DP_TX3_MPLL_EN, mask_sh),\
LE_SF(RDPCSTX0_RDPCSTX_PHY_CNTL6, RDPCS_PHY_DPALT_DP4, mask_sh),\
- LE_SF(RDPCSTX0_RDPCSTX_PHY_CNTL6, RDPCS_PHY_DPALT_DISABLE, mask_sh),\
+ LE_SF(RDPCSPIPE0_RDPCSPIPE_PHY_CNTL6, RDPCS_PHY_DPALT_DP4, mask_sh),\
+ LE_SF(RDPCSPIPE0_RDPCSPIPE_PHY_CNTL6, RDPCS_PHY_DPALT_DISABLE, mask_sh),\
+ LE_SF(RDPCSPIPE0_RDPCSPIPE_PHY_CNTL6, RDPCS_PHY_DPALT_DISABLE_ACK, mask_sh),\
LE_SF(RDPCSTX0_RDPCSTX_PHY_CNTL7, RDPCS_PHY_DP_MPLLB_FRACN_QUOT, mask_sh),\
LE_SF(RDPCSTX0_RDPCSTX_PHY_CNTL7, RDPCS_PHY_DP_MPLLB_FRACN_DEN, mask_sh),\
LE_SF(RDPCSTX0_RDPCSTX_PHY_CNTL8, RDPCS_PHY_DP_MPLLB_SSC_PEAK, mask_sh),\
@@ -243,4 +246,10 @@ void dcn31_link_encoder_disable_output(
struct link_encoder *enc,
enum signal_type signal);

+/*
+ * Check whether USB-C DP Alt mode is disabled
+ */
+bool dcn31_link_encoder_is_in_alt_mode(
+ struct link_encoder *enc);
+
#endif /* __DC_LINK_ENCODER__DCN31_H__ */
--- a/drivers/gpu/drm/amd/include/asic_reg/dpcs/dpcs_4_2_0_offset.h
+++ b/drivers/gpu/drm/amd/include/asic_reg/dpcs/dpcs_4_2_0_offset.h
@@ -11932,5 +11932,32 @@
#define ixDPCSSYS_CR4_RAWLANEX_DIG_PCS_XF_RX_OVRD_OUT_2 0xe0c7
#define ixDPCSSYS_CR4_RAWLANEX_DIG_PCS_XF_TX_OVRD_IN_2 0xe0c8

+//RDPCSPIPE0_RDPCSPIPE_PHY_CNTL6
+#define RDPCSPIPE0_RDPCSPIPE_PHY_CNTL6__RDPCS_PHY_DPALT_DP4__SHIFT 0x10
+#define RDPCSPIPE0_RDPCSPIPE_PHY_CNTL6__RDPCS_PHY_DPALT_DISABLE__SHIFT 0x11
+#define RDPCSPIPE0_RDPCSPIPE_PHY_CNTL6__RDPCS_PHY_DPALT_DISABLE_ACK__SHIFT 0x12
+#define RDPCSPIPE0_RDPCSPIPE_PHY_CNTL6__RDPCS_PHY_DPALT_DP4_MASK 0x00010000L
+#define RDPCSPIPE0_RDPCSPIPE_PHY_CNTL6__RDPCS_PHY_DPALT_DISABLE_MASK 0x00020000L
+#define RDPCSPIPE0_RDPCSPIPE_PHY_CNTL6__RDPCS_PHY_DPALT_DISABLE_ACK_MASK 0x00040000L
+
+//RDPCSPIPE1_RDPCSPIPE_PHY_CNTL6
+#define RDPCSPIPE1_RDPCSPIPE_PHY_CNTL6__RDPCS_PHY_DPALT_DP4__SHIFT 0x10
+#define RDPCSPIPE1_RDPCSPIPE_PHY_CNTL6__RDPCS_PHY_DPALT_DISABLE__SHIFT 0x11
+#define RDPCSPIPE1_RDPCSPIPE_PHY_CNTL6__RDPCS_PHY_DPALT_DISABLE_ACK__SHIFT 0x12
+#define RDPCSPIPE1_RDPCSPIPE_PHY_CNTL6__RDPCS_PHY_DPALT_DP4_MASK 0x00010000L
+#define RDPCSPIPE1_RDPCSPIPE_PHY_CNTL6__RDPCS_PHY_DPALT_DISABLE_MASK 0x00020000L
+#define RDPCSPIPE1_RDPCSPIPE_PHY_CNTL6__RDPCS_PHY_DPALT_DISABLE_ACK_MASK 0x00040000L
+
+//[Note] Hack. RDPCSPIPE only has 2 instances.
+#define regRDPCSPIPE0_RDPCSPIPE_PHY_CNTL6 0x2d73
+#define regRDPCSPIPE0_RDPCSPIPE_PHY_CNTL6_BASE_IDX 2
+#define regRDPCSPIPE1_RDPCSPIPE_PHY_CNTL6 0x2e4b
+#define regRDPCSPIPE1_RDPCSPIPE_PHY_CNTL6_BASE_IDX 2
+#define regRDPCSPIPE2_RDPCSPIPE_PHY_CNTL6 0x2d73
+#define regRDPCSPIPE2_RDPCSPIPE_PHY_CNTL6_BASE_IDX 2
+#define regRDPCSPIPE3_RDPCSPIPE_PHY_CNTL6 0x2e4b
+#define regRDPCSPIPE3_RDPCSPIPE_PHY_CNTL6_BASE_IDX 2
+#define regRDPCSPIPE4_RDPCSPIPE_PHY_CNTL6 0x2d73
+#define regRDPCSPIPE4_RDPCSPIPE_PHY_CNTL6_BASE_IDX 2

#endif