This patch adds handling of dp is usb-c, it is not tested but is
needed to support dp over usb-c
Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@xxxxxxx>
---
.../amd/display/dc/dcn10/dcn10_link_encoder.h | 14 +++
.../amd/display/dc/dcn21/dcn21_link_encoder.c | 93 ++++++++++++++++++-
.../amd/display/dc/dcn21/dcn21_link_encoder.h | 10 ++
3 files changed, 116 insertions(+), 1 deletion(-)
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 239a6c90ffb9..88fcc395adf5 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
@@ -113,6 +113,20 @@ struct dcn10_link_enc_registers {
uint32_t DIG_LANE_ENABLE;
/* UNIPHY */
uint32_t CHANNEL_XBAR_CNTL;
+ /* DPCS */
+ uint32_t RDPCSTX_PHY_CNTL3;
+ uint32_t RDPCSTX_PHY_CNTL4;
+ uint32_t RDPCSTX_PHY_CNTL5;
+ uint32_t RDPCSTX_PHY_CNTL6;
+ uint32_t RDPCSTX_PHY_CNTL7;
+ uint32_t RDPCSTX_PHY_CNTL8;
+ uint32_t RDPCSTX_PHY_CNTL9;
+ uint32_t RDPCSTX_PHY_CNTL10;
+ uint32_t RDPCSTX_PHY_CNTL11;
+ uint32_t RDPCSTX_PHY_CNTL12;
+ uint32_t RDPCSTX_PHY_CNTL13;
+ uint32_t RDPCSTX_PHY_CNTL14;
+ uint32_t RDPCSTX_PHY_CNTL15;
/* indirect registers */
uint32_t RAWLANE0_DIG_PCS_XF_RX_OVRD_IN_2;
uint32_t RAWLANE0_DIG_PCS_XF_RX_OVRD_IN_3;
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 526865c43b48..e8a504ca5890 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
@@ -203,6 +203,77 @@ 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);
+ int value;
+
+ if (enc->features.flags.bits.DP_IS_USB_C) {
+ REG_GET(RDPCSTX_PHY_CNTL6,
+ RDPCS_PHY_DPALT_DISABLE, &value);
+
+ if (value == 1) {
+ ASSERT(0);
+ return false;
+ }
+ REG_UPDATE(RDPCSTX_PHY_CNTL6,
+ RDPCS_PHY_DPALT_DISABLE_ACK, 0);
+
+ udelay(40);
+
+ REG_GET(RDPCSTX_PHY_CNTL6,
+ RDPCS_PHY_DPALT_DISABLE, &value);
+ if (value == 1) {
+ ASSERT(0);
+ REG_UPDATE(RDPCSTX_PHY_CNTL6,
+ RDPCS_PHY_DPALT_DISABLE_ACK, 1);
+ return false;
+ }
+ }
+
+ REG_UPDATE(RDPCSTX_PHY_CNTL6, RDPCS_PHY_DP_REF_CLK_EN, 1);
+
+ return true;
+}
+
+
+
+static void dcn21_link_encoder_release_phy(struct link_encoder *enc)
+{
+ struct dcn10_link_encoder *enc10 = TO_DCN10_LINK_ENC(enc);
+
+ if (enc->features.flags.bits.DP_IS_USB_C) {
+ REG_UPDATE(RDPCSTX_PHY_CNTL6,
+ RDPCS_PHY_DPALT_DISABLE_ACK, 1);
+ }
+
+ REG_UPDATE(RDPCSTX_PHY_CNTL6, RDPCS_PHY_DP_REF_CLK_EN, 0);
+
+}
+
void dcn21_link_encoder_enable_dp_output(
struct link_encoder *enc,
const struct dc_link_settings *link_settings,
@@ -212,6 +283,9 @@ void dcn21_link_encoder_enable_dp_output(
struct dcn21_link_encoder *enc21 = (struct dcn21_link_encoder *) enc10;
struct dpcssys_phy_seq_cfg *cfg = &enc21->phy_seq_cfg;
+ if (!dcn21_link_encoder_acquire_phy(enc))
+ return;
+
if (!enc->ctx->dc->debug.avoid_vbios_exec_table) {
dcn10_link_encoder_enable_dp_output(enc, link_settings, clock_source);
return;
@@ -226,13 +300,28 @@ void dcn21_link_encoder_enable_dp_output(
}
+void dcn21_link_encoder_enable_dp_mst_output(
+ struct link_encoder *enc,
+ const struct dc_link_settings *link_settings,
+ enum clock_source_id clock_source)
+{
+ if (!dcn21_link_encoder_acquire_phy(enc))
+ return;
+
+ dcn10_link_encoder_enable_dp_mst_output(enc, link_settings, clock_source);
+}
+
void dcn21_link_encoder_disable_output(
struct link_encoder *enc,
enum signal_type signal)
{
dcn10_link_encoder_disable_output(enc, signal);
+ if (dc_is_dp_signal(signal))
+ dcn21_link_encoder_release_phy(enc);
}
+
+
static const struct link_encoder_funcs dcn21_link_enc_funcs = {
#ifdef CONFIG_DRM_AMD_DC_DSC_SUPPORT
.read_state = link_enc2_read_state,
@@ -243,7 +332,7 @@ static const struct link_encoder_funcs dcn21_link_enc_funcs = {
.setup = dcn10_link_encoder_setup,
.enable_tmds_output = dcn10_link_encoder_enable_tmds_output,
.enable_dp_output = dcn21_link_encoder_enable_dp_output,
- .enable_dp_mst_output = dcn10_link_encoder_enable_dp_mst_output,
+ .enable_dp_mst_output = dcn21_link_encoder_enable_dp_mst_output,
.disable_output = dcn21_link_encoder_disable_output,
.dp_set_lane_settings = dcn10_link_encoder_dp_set_lane_settings,
.dp_set_phy_pattern = dcn10_link_encoder_dp_set_phy_pattern,
@@ -261,6 +350,8 @@ 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,
};
void dcn21_link_encoder_construct(
diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_link_encoder.h b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_link_encoder.h
index 438321e547db..1d7a1a51f13d 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_link_encoder.h
+++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_link_encoder.h
@@ -33,6 +33,16 @@ struct dcn21_link_encoder {
struct dpcssys_phy_seq_cfg phy_seq_cfg;
};
+#define LINK_ENCODER_MASK_SH_LIST_DCN21(mask_sh)\
+ LINK_ENCODER_MASK_SH_LIST_DCN20(mask_sh),\
+ LE_SF(UNIPHYA_CHANNEL_XBAR_CNTL, UNIPHY_CHANNEL0_XBAR_SOURCE, mask_sh),\
+ LE_SF(UNIPHYA_CHANNEL_XBAR_CNTL, UNIPHY_CHANNEL1_XBAR_SOURCE, mask_sh),\
+ LE_SF(UNIPHYA_CHANNEL_XBAR_CNTL, UNIPHY_CHANNEL2_XBAR_SOURCE, mask_sh),\
+ LE_SF(UNIPHYA_CHANNEL_XBAR_CNTL, UNIPHY_CHANNEL3_XBAR_SOURCE, mask_sh), \
+ SRI(RDPCSTX_PHY_FUSE2, RDPCSTX, id), \
+ SRI(RDPCSTX_PHY_FUSE3, RDPCSTX, id), \
+ SR(RDPCSTX0_RDPCSTX_SCRATCH)
+
void dcn21_link_encoder_enable_dp_output(
struct link_encoder *enc,
const struct dc_link_settings *link_settings,
--
2.17.1
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