Re: [RESEND RFC 17/18] drm/radeon: Drop legacy MST support

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On Tue, Jun 7, 2022 at 3:39 PM Lyude Paul <lyude@xxxxxxxxxx> wrote:
>
> Right now, radeon is technically the only non-atomic driver still making
> use of the MST helpers - and thus the final user of all of the legacy MST
> helpers. Originally I was going to look into seeing if we could move legacy
> MST into the radeon driver itself, however:
>
> * SI and CIK both can use amdgpu, which still supports MST
> * It currently doesn't work according to my own testing. I'm sure with some
>   troubleshooting we could likely fix it, but that brings me to point #2:
> * It was never actually enabled by default, and is still marked as
>   experimental in the module parameter description
> * If people were using it, someone probably would have probably seen a bug
>   report about how it is currently not functional by now. That certainly
>   doesn't appear to be the case, since before getting access to my own
>   hardware I had to go out of my way to try finding someone to help test
>   whether this legacy MST code even works - even amongst AMD employees.
> * Getting rid of this code and only having atomic versions of the MST
>   helpers to maintain is likely going to be a lot easier in the long run,
>   and will make it a lot easier for others contributing to this code to
>   follow along with what's happening.
>
> FWIW - if anyone still wants this code to be in the tree and has a good
> idea of how to support this without needing to maintain the legacy MST
> helpers (trying to move them would probably be acceptable), I'm happy to
> suggestions. But my hope is that we can just drop this code and forget
> about it. I've already run this idea by Harry Wentland and Alex Deucher a
> few times as well.
>
> Signed-off-by: Lyude Paul <lyude@xxxxxxxxxx>
> Cc: Wayne Lin <Wayne.Lin@xxxxxxx>
> Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> Cc: Fangzhi Zuo <Jerry.Zuo@xxxxxxx>
> Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
> Cc: Imre Deak <imre.deak@xxxxxxxxx>
> Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
> Cc: Sean Paul <sean@xxxxxxxxxx>

Acked-by: Alex Deucher <alexander.deucher@xxxxxxx>

> ---
>  drivers/gpu/drm/radeon/Makefile            |   2 +-
>  drivers/gpu/drm/radeon/atombios_crtc.c     |  11 +-
>  drivers/gpu/drm/radeon/atombios_encoders.c |  59 --
>  drivers/gpu/drm/radeon/radeon_atombios.c   |   2 -
>  drivers/gpu/drm/radeon/radeon_connectors.c |  61 +-
>  drivers/gpu/drm/radeon/radeon_device.c     |   1 -
>  drivers/gpu/drm/radeon/radeon_dp_mst.c     | 778 ---------------------
>  drivers/gpu/drm/radeon/radeon_drv.c        |   4 -
>  drivers/gpu/drm/radeon/radeon_encoders.c   |  14 +-
>  drivers/gpu/drm/radeon/radeon_irq_kms.c    |  10 +-
>  drivers/gpu/drm/radeon/radeon_mode.h       |  40 --
>  11 files changed, 7 insertions(+), 975 deletions(-)
>  delete mode 100644 drivers/gpu/drm/radeon/radeon_dp_mst.c
>
> diff --git a/drivers/gpu/drm/radeon/Makefile b/drivers/gpu/drm/radeon/Makefile
> index ea5380e24c3c..b783ab39a075 100644
> --- a/drivers/gpu/drm/radeon/Makefile
> +++ b/drivers/gpu/drm/radeon/Makefile
> @@ -49,7 +49,7 @@ radeon-y += radeon_device.o radeon_asic.o radeon_kms.o \
>         rv770_smc.o cypress_dpm.o btc_dpm.o sumo_dpm.o sumo_smc.o trinity_dpm.o \
>         trinity_smc.o ni_dpm.o si_smc.o si_dpm.o kv_smc.o kv_dpm.o ci_smc.o \
>         ci_dpm.o dce6_afmt.o radeon_vm.o radeon_ucode.o radeon_ib.o \
> -       radeon_sync.o radeon_audio.o radeon_dp_auxch.o radeon_dp_mst.o
> +       radeon_sync.o radeon_audio.o radeon_dp_auxch.o
>
>  radeon-$(CONFIG_MMU_NOTIFIER) += radeon_mn.o
>
> diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c
> index c94e429e75f9..e27da31d4f62 100644
> --- a/drivers/gpu/drm/radeon/atombios_crtc.c
> +++ b/drivers/gpu/drm/radeon/atombios_crtc.c
> @@ -616,13 +616,6 @@ static u32 atombios_adjust_pll(struct drm_crtc *crtc,
>                 }
>         }
>
> -       if (radeon_encoder->is_mst_encoder) {
> -               struct radeon_encoder_mst *mst_enc = radeon_encoder->enc_priv;
> -               struct radeon_connector_atom_dig *dig_connector = mst_enc->connector->con_priv;
> -
> -               dp_clock = dig_connector->dp_clock;
> -       }
> -
>         /* use recommended ref_div for ss */
>         if (radeon_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT)) {
>                 if (radeon_crtc->ss_enabled) {
> @@ -971,9 +964,7 @@ static bool atombios_crtc_prepare_pll(struct drm_crtc *crtc, struct drm_display_
>         radeon_crtc->bpc = 8;
>         radeon_crtc->ss_enabled = false;
>
> -       if (radeon_encoder->is_mst_encoder) {
> -               radeon_dp_mst_prepare_pll(crtc, mode);
> -       } else if ((radeon_encoder->active_device & (ATOM_DEVICE_LCD_SUPPORT | ATOM_DEVICE_DFP_SUPPORT)) ||
> +       if ((radeon_encoder->active_device & (ATOM_DEVICE_LCD_SUPPORT | ATOM_DEVICE_DFP_SUPPORT)) ||
>             (radeon_encoder_get_dp_bridge_encoder_id(radeon_crtc->encoder) != ENCODER_OBJECT_ID_NONE)) {
>                 struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
>                 struct drm_connector *connector =
> diff --git a/drivers/gpu/drm/radeon/atombios_encoders.c b/drivers/gpu/drm/radeon/atombios_encoders.c
> index 70bd84b7ef2b..597446a8df34 100644
> --- a/drivers/gpu/drm/radeon/atombios_encoders.c
> +++ b/drivers/gpu/drm/radeon/atombios_encoders.c
> @@ -681,15 +681,7 @@ atombios_get_encoder_mode(struct drm_encoder *encoder)
>         struct drm_connector *connector;
>         struct radeon_connector *radeon_connector;
>         struct radeon_connector_atom_dig *dig_connector;
> -       struct radeon_encoder_atom_dig *dig_enc;
>
> -       if (radeon_encoder_is_digital(encoder)) {
> -               dig_enc = radeon_encoder->enc_priv;
> -               if (dig_enc->active_mst_links)
> -                       return ATOM_ENCODER_MODE_DP_MST;
> -       }
> -       if (radeon_encoder->is_mst_encoder || radeon_encoder->offset)
> -               return ATOM_ENCODER_MODE_DP_MST;
>         /* dp bridges are always DP */
>         if (radeon_encoder_get_dp_bridge_encoder_id(encoder) != ENCODER_OBJECT_ID_NONE)
>                 return ATOM_ENCODER_MODE_DP;
> @@ -1737,10 +1729,6 @@ radeon_atom_encoder_dpms_dig(struct drm_encoder *encoder, int mode)
>         case DRM_MODE_DPMS_SUSPEND:
>         case DRM_MODE_DPMS_OFF:
>
> -               /* don't power off encoders with active MST links */
> -               if (dig->active_mst_links)
> -                       return;
> -
>                 if (ASIC_IS_DCE4(rdev)) {
>                         if (ENCODER_MODE_IS_DP(atombios_get_encoder_mode(encoder)) && connector)
>                                 atombios_dig_encoder_setup(encoder, ATOM_ENCODER_CMD_DP_VIDEO_OFF, 0);
> @@ -2006,53 +1994,6 @@ atombios_set_encoder_crtc_source(struct drm_encoder *encoder)
>         radeon_atombios_encoder_crtc_scratch_regs(encoder, radeon_crtc->crtc_id);
>  }
>
> -void
> -atombios_set_mst_encoder_crtc_source(struct drm_encoder *encoder, int fe)
> -{
> -       struct drm_device *dev = encoder->dev;
> -       struct radeon_device *rdev = dev->dev_private;
> -       struct radeon_crtc *radeon_crtc = to_radeon_crtc(encoder->crtc);
> -       int index = GetIndexIntoMasterTable(COMMAND, SelectCRTC_Source);
> -       uint8_t frev, crev;
> -       union crtc_source_param args;
> -
> -       memset(&args, 0, sizeof(args));
> -
> -       if (!atom_parse_cmd_header(rdev->mode_info.atom_context, index, &frev, &crev))
> -               return;
> -
> -       if (frev != 1 && crev != 2)
> -               DRM_ERROR("Unknown table for MST %d, %d\n", frev, crev);
> -
> -       args.v2.ucCRTC = radeon_crtc->crtc_id;
> -       args.v2.ucEncodeMode = ATOM_ENCODER_MODE_DP_MST;
> -
> -       switch (fe) {
> -       case 0:
> -               args.v2.ucEncoderID = ASIC_INT_DIG1_ENCODER_ID;
> -               break;
> -       case 1:
> -               args.v2.ucEncoderID = ASIC_INT_DIG2_ENCODER_ID;
> -               break;
> -       case 2:
> -               args.v2.ucEncoderID = ASIC_INT_DIG3_ENCODER_ID;
> -               break;
> -       case 3:
> -               args.v2.ucEncoderID = ASIC_INT_DIG4_ENCODER_ID;
> -               break;
> -       case 4:
> -               args.v2.ucEncoderID = ASIC_INT_DIG5_ENCODER_ID;
> -               break;
> -       case 5:
> -               args.v2.ucEncoderID = ASIC_INT_DIG6_ENCODER_ID;
> -               break;
> -       case 6:
> -               args.v2.ucEncoderID = ASIC_INT_DIG7_ENCODER_ID;
> -               break;
> -       }
> -       atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
> -}
> -
>  static void
>  atombios_apply_encoder_quirks(struct drm_encoder *encoder,
>                               struct drm_display_mode *mode)
> diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c
> index 28c4413f4dc8..204127bad89c 100644
> --- a/drivers/gpu/drm/radeon/radeon_atombios.c
> +++ b/drivers/gpu/drm/radeon/radeon_atombios.c
> @@ -826,8 +826,6 @@ bool radeon_get_atom_connector_info_from_object_table(struct drm_device *dev)
>         }
>
>         radeon_link_encoder_connector(dev);
> -
> -       radeon_setup_mst_connector(dev);
>         return true;
>  }
>
> diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c
> index 58db79921cd3..f7431d224604 100644
> --- a/drivers/gpu/drm/radeon/radeon_connectors.c
> +++ b/drivers/gpu/drm/radeon/radeon_connectors.c
> @@ -37,33 +37,12 @@
>  #include <linux/pm_runtime.h>
>  #include <linux/vga_switcheroo.h>
>
> -static int radeon_dp_handle_hpd(struct drm_connector *connector)
> -{
> -       struct radeon_connector *radeon_connector = to_radeon_connector(connector);
> -       int ret;
> -
> -       ret = radeon_dp_mst_check_status(radeon_connector);
> -       if (ret == -EINVAL)
> -               return 1;
> -       return 0;
> -}
>  void radeon_connector_hotplug(struct drm_connector *connector)
>  {
>         struct drm_device *dev = connector->dev;
>         struct radeon_device *rdev = dev->dev_private;
>         struct radeon_connector *radeon_connector = to_radeon_connector(connector);
>
> -       if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort) {
> -               struct radeon_connector_atom_dig *dig_connector =
> -                       radeon_connector->con_priv;
> -
> -               if (radeon_connector->is_mst_connector)
> -                       return;
> -               if (dig_connector->is_mst) {
> -                       radeon_dp_handle_hpd(connector);
> -                       return;
> -               }
> -       }
>         /* bail if the connector does not have hpd pin, e.g.,
>          * VGA, TV, etc.
>          */
> @@ -1664,9 +1643,6 @@ radeon_dp_detect(struct drm_connector *connector, bool force)
>         struct drm_encoder *encoder = radeon_best_single_encoder(connector);
>         int r;
>
> -       if (radeon_dig_connector->is_mst)
> -               return connector_status_disconnected;
> -
>         if (!drm_kms_helper_is_poll_worker()) {
>                 r = pm_runtime_get_sync(connector->dev->dev);
>                 if (r < 0) {
> @@ -1729,21 +1705,12 @@ radeon_dp_detect(struct drm_connector *connector, bool force)
>                 radeon_dig_connector->dp_sink_type = radeon_dp_getsinktype(radeon_connector);
>                 if (radeon_hpd_sense(rdev, radeon_connector->hpd.hpd)) {
>                         ret = connector_status_connected;
> -                       if (radeon_dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT) {
> +                       if (radeon_dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT)
>                                 radeon_dp_getdpcd(radeon_connector);
> -                               r = radeon_dp_mst_probe(radeon_connector);
> -                               if (r == 1)
> -                                       ret = connector_status_disconnected;
> -                       }
>                 } else {
>                         if (radeon_dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT) {
> -                               if (radeon_dp_getdpcd(radeon_connector)) {
> -                                       r = radeon_dp_mst_probe(radeon_connector);
> -                                       if (r == 1)
> -                                               ret = connector_status_disconnected;
> -                                       else
> -                                               ret = connector_status_connected;
> -                               }
> +                               if (radeon_dp_getdpcd(radeon_connector))
> +                                       ret = connector_status_connected;
>                         } else {
>                                 /* try non-aux ddc (DP to DVI/HDMI/etc. adapter) */
>                                 if (radeon_ddc_probe(radeon_connector, false))
> @@ -2561,25 +2528,3 @@ radeon_add_legacy_connector(struct drm_device *dev,
>         connector->display_info.subpixel_order = subpixel_order;
>         drm_connector_register(connector);
>  }
> -
> -void radeon_setup_mst_connector(struct drm_device *dev)
> -{
> -       struct radeon_device *rdev = dev->dev_private;
> -       struct drm_connector *connector;
> -       struct radeon_connector *radeon_connector;
> -
> -       if (!ASIC_IS_DCE5(rdev))
> -               return;
> -
> -       if (radeon_mst == 0)
> -               return;
> -
> -       list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
> -               radeon_connector = to_radeon_connector(connector);
> -
> -               if (connector->connector_type != DRM_MODE_CONNECTOR_DisplayPort)
> -                       continue;
> -
> -               radeon_dp_mst_init(radeon_connector);
> -       }
> -}
> diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
> index 15692cb241fc..10548a184cc5 100644
> --- a/drivers/gpu/drm/radeon/radeon_device.c
> +++ b/drivers/gpu/drm/radeon/radeon_device.c
> @@ -1437,7 +1437,6 @@ int radeon_device_init(struct radeon_device *rdev,
>                 goto failed;
>
>         radeon_gem_debugfs_init(rdev);
> -       radeon_mst_debugfs_init(rdev);
>
>         if (rdev->flags & RADEON_IS_AGP && !rdev->accel_working) {
>                 /* Acceleration not working on AGP card try again
> diff --git a/drivers/gpu/drm/radeon/radeon_dp_mst.c b/drivers/gpu/drm/radeon/radeon_dp_mst.c
> deleted file mode 100644
> index 54ced1f4ff67..000000000000
> --- a/drivers/gpu/drm/radeon/radeon_dp_mst.c
> +++ /dev/null
> @@ -1,778 +0,0 @@
> -// SPDX-License-Identifier: MIT
> -
> -#include <drm/display/drm_dp_mst_helper.h>
> -#include <drm/drm_fb_helper.h>
> -#include <drm/drm_file.h>
> -#include <drm/drm_probe_helper.h>
> -
> -#include "atom.h"
> -#include "ni_reg.h"
> -#include "radeon.h"
> -
> -static struct radeon_encoder *radeon_dp_create_fake_mst_encoder(struct radeon_connector *connector);
> -
> -static int radeon_atom_set_enc_offset(int id)
> -{
> -       static const int offsets[] = { EVERGREEN_CRTC0_REGISTER_OFFSET,
> -                                      EVERGREEN_CRTC1_REGISTER_OFFSET,
> -                                      EVERGREEN_CRTC2_REGISTER_OFFSET,
> -                                      EVERGREEN_CRTC3_REGISTER_OFFSET,
> -                                      EVERGREEN_CRTC4_REGISTER_OFFSET,
> -                                      EVERGREEN_CRTC5_REGISTER_OFFSET,
> -                                      0x13830 - 0x7030 };
> -
> -       return offsets[id];
> -}
> -
> -static int radeon_dp_mst_set_be_cntl(struct radeon_encoder *primary,
> -                                    struct radeon_encoder_mst *mst_enc,
> -                                    enum radeon_hpd_id hpd, bool enable)
> -{
> -       struct drm_device *dev = primary->base.dev;
> -       struct radeon_device *rdev = dev->dev_private;
> -       uint32_t reg;
> -       int retries = 0;
> -       uint32_t temp;
> -
> -       reg = RREG32(NI_DIG_BE_CNTL + primary->offset);
> -
> -       /* set MST mode */
> -       reg &= ~NI_DIG_FE_DIG_MODE(7);
> -       reg |= NI_DIG_FE_DIG_MODE(NI_DIG_MODE_DP_MST);
> -
> -       if (enable)
> -               reg |= NI_DIG_FE_SOURCE_SELECT(1 << mst_enc->fe);
> -       else
> -               reg &= ~NI_DIG_FE_SOURCE_SELECT(1 << mst_enc->fe);
> -
> -       reg |= NI_DIG_HPD_SELECT(hpd);
> -       DRM_DEBUG_KMS("writing 0x%08x 0x%08x\n", NI_DIG_BE_CNTL + primary->offset, reg);
> -       WREG32(NI_DIG_BE_CNTL + primary->offset, reg);
> -
> -       if (enable) {
> -               uint32_t offset = radeon_atom_set_enc_offset(mst_enc->fe);
> -
> -               do {
> -                       temp = RREG32(NI_DIG_FE_CNTL + offset);
> -               } while ((temp & NI_DIG_SYMCLK_FE_ON) && retries++ < 10000);
> -               if (retries == 10000)
> -                       DRM_ERROR("timed out waiting for FE %d %d\n", primary->offset, mst_enc->fe);
> -       }
> -       return 0;
> -}
> -
> -static int radeon_dp_mst_set_stream_attrib(struct radeon_encoder *primary,
> -                                          int stream_number,
> -                                          int fe,
> -                                          int slots)
> -{
> -       struct drm_device *dev = primary->base.dev;
> -       struct radeon_device *rdev = dev->dev_private;
> -       u32 temp, val;
> -       int retries  = 0;
> -       int satreg, satidx;
> -
> -       satreg = stream_number >> 1;
> -       satidx = stream_number & 1;
> -
> -       temp = RREG32(NI_DP_MSE_SAT0 + satreg + primary->offset);
> -
> -       val = NI_DP_MSE_SAT_SLOT_COUNT0(slots) | NI_DP_MSE_SAT_SRC0(fe);
> -
> -       val <<= (16 * satidx);
> -
> -       temp &= ~(0xffff << (16 * satidx));
> -
> -       temp |= val;
> -
> -       DRM_DEBUG_KMS("writing 0x%08x 0x%08x\n", NI_DP_MSE_SAT0 + satreg + primary->offset, temp);
> -       WREG32(NI_DP_MSE_SAT0 + satreg + primary->offset, temp);
> -
> -       WREG32(NI_DP_MSE_SAT_UPDATE + primary->offset, 1);
> -
> -       do {
> -               unsigned value1, value2;
> -               udelay(10);
> -               temp = RREG32(NI_DP_MSE_SAT_UPDATE + primary->offset);
> -
> -               value1 = temp & NI_DP_MSE_SAT_UPDATE_MASK;
> -               value2 = temp & NI_DP_MSE_16_MTP_KEEPOUT;
> -
> -               if (!value1 && !value2)
> -                       break;
> -       } while (retries++ < 50);
> -
> -       if (retries == 10000)
> -               DRM_ERROR("timed out waitin for SAT update %d\n", primary->offset);
> -
> -       /* MTP 16 ? */
> -       return 0;
> -}
> -
> -static int radeon_dp_mst_update_stream_attribs(struct radeon_connector *mst_conn,
> -                                              struct radeon_encoder *primary)
> -{
> -       struct drm_device *dev = mst_conn->base.dev;
> -       struct stream_attribs new_attribs[6];
> -       int i;
> -       int idx = 0;
> -       struct radeon_connector *radeon_connector;
> -       struct drm_connector *connector;
> -
> -       memset(new_attribs, 0, sizeof(new_attribs));
> -       list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
> -               struct radeon_encoder *subenc;
> -               struct radeon_encoder_mst *mst_enc;
> -
> -               radeon_connector = to_radeon_connector(connector);
> -               if (!radeon_connector->is_mst_connector)
> -                       continue;
> -
> -               if (radeon_connector->mst_port != mst_conn)
> -                       continue;
> -
> -               subenc = radeon_connector->mst_encoder;
> -               mst_enc = subenc->enc_priv;
> -
> -               if (!mst_enc->enc_active)
> -                       continue;
> -
> -               new_attribs[idx].fe = mst_enc->fe;
> -               new_attribs[idx].slots = drm_dp_mst_get_vcpi_slots(&mst_conn->mst_mgr, mst_enc->port);
> -               idx++;
> -       }
> -
> -       for (i = 0; i < idx; i++) {
> -               if (new_attribs[i].fe != mst_conn->cur_stream_attribs[i].fe ||
> -                   new_attribs[i].slots != mst_conn->cur_stream_attribs[i].slots) {
> -                       radeon_dp_mst_set_stream_attrib(primary, i, new_attribs[i].fe, new_attribs[i].slots);
> -                       mst_conn->cur_stream_attribs[i].fe = new_attribs[i].fe;
> -                       mst_conn->cur_stream_attribs[i].slots = new_attribs[i].slots;
> -               }
> -       }
> -
> -       for (i = idx; i < mst_conn->enabled_attribs; i++) {
> -               radeon_dp_mst_set_stream_attrib(primary, i, 0, 0);
> -               mst_conn->cur_stream_attribs[i].fe = 0;
> -               mst_conn->cur_stream_attribs[i].slots = 0;
> -       }
> -       mst_conn->enabled_attribs = idx;
> -       return 0;
> -}
> -
> -static int radeon_dp_mst_set_vcp_size(struct radeon_encoder *mst, s64 avg_time_slots_per_mtp)
> -{
> -       struct drm_device *dev = mst->base.dev;
> -       struct radeon_device *rdev = dev->dev_private;
> -       struct radeon_encoder_mst *mst_enc = mst->enc_priv;
> -       uint32_t val, temp;
> -       uint32_t offset = radeon_atom_set_enc_offset(mst_enc->fe);
> -       int retries = 0;
> -       uint32_t x = drm_fixp2int(avg_time_slots_per_mtp);
> -       uint32_t y = drm_fixp2int_ceil((avg_time_slots_per_mtp - x) << 26);
> -
> -       val = NI_DP_MSE_RATE_X(x) | NI_DP_MSE_RATE_Y(y);
> -
> -       WREG32(NI_DP_MSE_RATE_CNTL + offset, val);
> -
> -       do {
> -               temp = RREG32(NI_DP_MSE_RATE_UPDATE + offset);
> -               udelay(10);
> -       } while ((temp & 0x1) && (retries++ < 10000));
> -
> -       if (retries >= 10000)
> -               DRM_ERROR("timed out wait for rate cntl %d\n", mst_enc->fe);
> -       return 0;
> -}
> -
> -static int radeon_dp_mst_get_ddc_modes(struct drm_connector *connector)
> -{
> -       struct radeon_connector *radeon_connector = to_radeon_connector(connector);
> -       struct radeon_connector *master = radeon_connector->mst_port;
> -       struct edid *edid;
> -       int ret = 0;
> -
> -       edid = drm_dp_mst_get_edid(connector, &master->mst_mgr, radeon_connector->port);
> -       radeon_connector->edid = edid;
> -       DRM_DEBUG_KMS("edid retrieved %p\n", edid);
> -       if (radeon_connector->edid) {
> -               drm_connector_update_edid_property(&radeon_connector->base, radeon_connector->edid);
> -               ret = drm_add_edid_modes(&radeon_connector->base, radeon_connector->edid);
> -               return ret;
> -       }
> -       drm_connector_update_edid_property(&radeon_connector->base, NULL);
> -
> -       return ret;
> -}
> -
> -static int radeon_dp_mst_get_modes(struct drm_connector *connector)
> -{
> -       return radeon_dp_mst_get_ddc_modes(connector);
> -}
> -
> -static enum drm_mode_status
> -radeon_dp_mst_mode_valid(struct drm_connector *connector,
> -                       struct drm_display_mode *mode)
> -{
> -       /* TODO - validate mode against available PBN for link */
> -       if (mode->clock < 10000)
> -               return MODE_CLOCK_LOW;
> -
> -       if (mode->flags & DRM_MODE_FLAG_DBLCLK)
> -               return MODE_H_ILLEGAL;
> -
> -       return MODE_OK;
> -}
> -
> -static struct
> -drm_encoder *radeon_mst_best_encoder(struct drm_connector *connector)
> -{
> -       struct radeon_connector *radeon_connector = to_radeon_connector(connector);
> -
> -       return &radeon_connector->mst_encoder->base;
> -}
> -
> -static int
> -radeon_dp_mst_detect(struct drm_connector *connector,
> -                    struct drm_modeset_acquire_ctx *ctx,
> -                    bool force)
> -{
> -       struct radeon_connector *radeon_connector =
> -               to_radeon_connector(connector);
> -       struct radeon_connector *master = radeon_connector->mst_port;
> -
> -       if (drm_connector_is_unregistered(connector))
> -               return connector_status_disconnected;
> -
> -       return drm_dp_mst_detect_port(connector, ctx, &master->mst_mgr,
> -                                     radeon_connector->port);
> -}
> -
> -static const struct drm_connector_helper_funcs radeon_dp_mst_connector_helper_funcs = {
> -       .get_modes = radeon_dp_mst_get_modes,
> -       .mode_valid = radeon_dp_mst_mode_valid,
> -       .best_encoder = radeon_mst_best_encoder,
> -       .detect_ctx = radeon_dp_mst_detect,
> -};
> -
> -static void
> -radeon_dp_mst_connector_destroy(struct drm_connector *connector)
> -{
> -       struct radeon_connector *radeon_connector = to_radeon_connector(connector);
> -       struct radeon_encoder *radeon_encoder = radeon_connector->mst_encoder;
> -
> -       drm_encoder_cleanup(&radeon_encoder->base);
> -       kfree(radeon_encoder);
> -       drm_connector_cleanup(connector);
> -       kfree(radeon_connector);
> -}
> -
> -static const struct drm_connector_funcs radeon_dp_mst_connector_funcs = {
> -       .dpms = drm_helper_connector_dpms,
> -       .fill_modes = drm_helper_probe_single_connector_modes,
> -       .destroy = radeon_dp_mst_connector_destroy,
> -};
> -
> -static struct drm_connector *radeon_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
> -                                                        struct drm_dp_mst_port *port,
> -                                                        const char *pathprop)
> -{
> -       struct radeon_connector *master = container_of(mgr, struct radeon_connector, mst_mgr);
> -       struct drm_device *dev = master->base.dev;
> -       struct radeon_connector *radeon_connector;
> -       struct drm_connector *connector;
> -
> -       radeon_connector = kzalloc(sizeof(*radeon_connector), GFP_KERNEL);
> -       if (!radeon_connector)
> -               return NULL;
> -
> -       radeon_connector->is_mst_connector = true;
> -       connector = &radeon_connector->base;
> -       radeon_connector->port = port;
> -       radeon_connector->mst_port = master;
> -       DRM_DEBUG_KMS("\n");
> -
> -       drm_connector_init(dev, connector, &radeon_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
> -       drm_connector_helper_add(connector, &radeon_dp_mst_connector_helper_funcs);
> -       radeon_connector->mst_encoder = radeon_dp_create_fake_mst_encoder(master);
> -
> -       drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
> -       drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
> -       drm_connector_set_path_property(connector, pathprop);
> -
> -       return connector;
> -}
> -
> -static const struct drm_dp_mst_topology_cbs mst_cbs = {
> -       .add_connector = radeon_dp_add_mst_connector,
> -};
> -
> -static struct
> -radeon_connector *radeon_mst_find_connector(struct drm_encoder *encoder)
> -{
> -       struct drm_device *dev = encoder->dev;
> -       struct drm_connector *connector;
> -
> -       list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
> -               struct radeon_connector *radeon_connector = to_radeon_connector(connector);
> -               if (!connector->encoder)
> -                       continue;
> -               if (!radeon_connector->is_mst_connector)
> -                       continue;
> -
> -               DRM_DEBUG_KMS("checking %p vs %p\n", connector->encoder, encoder);
> -               if (connector->encoder == encoder)
> -                       return radeon_connector;
> -       }
> -       return NULL;
> -}
> -
> -void radeon_dp_mst_prepare_pll(struct drm_crtc *crtc, struct drm_display_mode *mode)
> -{
> -       struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
> -       struct drm_device *dev = crtc->dev;
> -       struct radeon_device *rdev = dev->dev_private;
> -       struct radeon_encoder *radeon_encoder = to_radeon_encoder(radeon_crtc->encoder);
> -       struct radeon_encoder_mst *mst_enc = radeon_encoder->enc_priv;
> -       struct radeon_connector *radeon_connector = radeon_mst_find_connector(&radeon_encoder->base);
> -       int dp_clock;
> -       struct radeon_connector_atom_dig *dig_connector = mst_enc->connector->con_priv;
> -
> -       if (radeon_connector) {
> -               radeon_connector->pixelclock_for_modeset = mode->clock;
> -               if (radeon_connector->base.display_info.bpc)
> -                       radeon_crtc->bpc = radeon_connector->base.display_info.bpc;
> -               else
> -                       radeon_crtc->bpc = 8;
> -       }
> -
> -       DRM_DEBUG_KMS("dp_clock %p %d\n", dig_connector, dig_connector->dp_clock);
> -       dp_clock = dig_connector->dp_clock;
> -       radeon_crtc->ss_enabled =
> -               radeon_atombios_get_asic_ss_info(rdev, &radeon_crtc->ss,
> -                                                ASIC_INTERNAL_SS_ON_DP,
> -                                                dp_clock);
> -}
> -
> -static void
> -radeon_mst_encoder_dpms(struct drm_encoder *encoder, int mode)
> -{
> -       struct drm_device *dev = encoder->dev;
> -       struct radeon_device *rdev = dev->dev_private;
> -       struct radeon_encoder *radeon_encoder, *primary;
> -       struct radeon_encoder_mst *mst_enc;
> -       struct radeon_encoder_atom_dig *dig_enc;
> -       struct radeon_connector *radeon_connector;
> -       struct drm_crtc *crtc;
> -       struct radeon_crtc *radeon_crtc;
> -       int slots;
> -       s64 fixed_pbn, fixed_pbn_per_slot, avg_time_slots_per_mtp;
> -       if (!ASIC_IS_DCE5(rdev)) {
> -               DRM_ERROR("got mst dpms on non-DCE5\n");
> -               return;
> -       }
> -
> -       radeon_connector = radeon_mst_find_connector(encoder);
> -       if (!radeon_connector)
> -               return;
> -
> -       radeon_encoder = to_radeon_encoder(encoder);
> -
> -       mst_enc = radeon_encoder->enc_priv;
> -
> -       primary = mst_enc->primary;
> -
> -       dig_enc = primary->enc_priv;
> -
> -       crtc = encoder->crtc;
> -       DRM_DEBUG_KMS("got connector %d\n", dig_enc->active_mst_links);
> -
> -       switch (mode) {
> -       case DRM_MODE_DPMS_ON:
> -               dig_enc->active_mst_links++;
> -
> -               radeon_crtc = to_radeon_crtc(crtc);
> -
> -               if (dig_enc->active_mst_links == 1) {
> -                       mst_enc->fe = dig_enc->dig_encoder;
> -                       mst_enc->fe_from_be = true;
> -                       atombios_set_mst_encoder_crtc_source(encoder, mst_enc->fe);
> -
> -                       atombios_dig_encoder_setup(&primary->base, ATOM_ENCODER_CMD_SETUP, 0);
> -                       atombios_dig_transmitter_setup2(&primary->base, ATOM_TRANSMITTER_ACTION_ENABLE,
> -                                                       0, 0, dig_enc->dig_encoder);
> -
> -                       if (radeon_dp_needs_link_train(mst_enc->connector) ||
> -                           dig_enc->active_mst_links == 1) {
> -                               radeon_dp_link_train(&primary->base, &mst_enc->connector->base);
> -                       }
> -
> -               } else {
> -                       mst_enc->fe = radeon_atom_pick_dig_encoder(encoder, radeon_crtc->crtc_id);
> -                       if (mst_enc->fe == -1)
> -                               DRM_ERROR("failed to get frontend for dig encoder\n");
> -                       mst_enc->fe_from_be = false;
> -                       atombios_set_mst_encoder_crtc_source(encoder, mst_enc->fe);
> -               }
> -
> -               DRM_DEBUG_KMS("dig encoder is %d %d %d\n", dig_enc->dig_encoder,
> -                             dig_enc->linkb, radeon_crtc->crtc_id);
> -
> -               slots = drm_dp_find_vcpi_slots(&radeon_connector->mst_port->mst_mgr,
> -                                              mst_enc->pbn);
> -               drm_dp_mst_allocate_vcpi(&radeon_connector->mst_port->mst_mgr,
> -                                        radeon_connector->port,
> -                                        mst_enc->pbn, slots);
> -               drm_dp_update_payload_part1(&radeon_connector->mst_port->mst_mgr, 1);
> -
> -               radeon_dp_mst_set_be_cntl(primary, mst_enc,
> -                                         radeon_connector->mst_port->hpd.hpd, true);
> -
> -               mst_enc->enc_active = true;
> -               radeon_dp_mst_update_stream_attribs(radeon_connector->mst_port, primary);
> -
> -               fixed_pbn = drm_int2fixp(mst_enc->pbn);
> -               fixed_pbn_per_slot = drm_int2fixp(radeon_connector->mst_port->mst_mgr.pbn_div);
> -               avg_time_slots_per_mtp = drm_fixp_div(fixed_pbn, fixed_pbn_per_slot);
> -               radeon_dp_mst_set_vcp_size(radeon_encoder, avg_time_slots_per_mtp);
> -
> -               atombios_dig_encoder_setup2(&primary->base, ATOM_ENCODER_CMD_DP_VIDEO_ON, 0,
> -                                           mst_enc->fe);
> -               drm_dp_check_act_status(&radeon_connector->mst_port->mst_mgr);
> -
> -               drm_dp_update_payload_part2(&radeon_connector->mst_port->mst_mgr);
> -
> -               break;
> -       case DRM_MODE_DPMS_STANDBY:
> -       case DRM_MODE_DPMS_SUSPEND:
> -       case DRM_MODE_DPMS_OFF:
> -               DRM_ERROR("DPMS OFF %d\n", dig_enc->active_mst_links);
> -
> -               if (!mst_enc->enc_active)
> -                       return;
> -
> -               drm_dp_mst_reset_vcpi_slots(&radeon_connector->mst_port->mst_mgr, mst_enc->port);
> -               drm_dp_update_payload_part1(&radeon_connector->mst_port->mst_mgr, 1);
> -
> -               drm_dp_check_act_status(&radeon_connector->mst_port->mst_mgr);
> -               /* and this can also fail */
> -               drm_dp_update_payload_part2(&radeon_connector->mst_port->mst_mgr);
> -
> -               drm_dp_mst_deallocate_vcpi(&radeon_connector->mst_port->mst_mgr, mst_enc->port);
> -
> -               mst_enc->enc_active = false;
> -               radeon_dp_mst_update_stream_attribs(radeon_connector->mst_port, primary);
> -
> -               radeon_dp_mst_set_be_cntl(primary, mst_enc,
> -                                         radeon_connector->mst_port->hpd.hpd, false);
> -               atombios_dig_encoder_setup2(&primary->base, ATOM_ENCODER_CMD_DP_VIDEO_OFF, 0,
> -                                           mst_enc->fe);
> -
> -               if (!mst_enc->fe_from_be)
> -                       radeon_atom_release_dig_encoder(rdev, mst_enc->fe);
> -
> -               mst_enc->fe_from_be = false;
> -               dig_enc->active_mst_links--;
> -               if (dig_enc->active_mst_links == 0) {
> -                       /* drop link */
> -               }
> -
> -               break;
> -       }
> -
> -}
> -
> -static bool radeon_mst_mode_fixup(struct drm_encoder *encoder,
> -                                  const struct drm_display_mode *mode,
> -                                  struct drm_display_mode *adjusted_mode)
> -{
> -       struct radeon_encoder_mst *mst_enc;
> -       struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
> -       struct radeon_connector_atom_dig *dig_connector;
> -       int bpp = 24;
> -
> -       mst_enc = radeon_encoder->enc_priv;
> -
> -       mst_enc->pbn = drm_dp_calc_pbn_mode(adjusted_mode->clock, bpp, false);
> -
> -       mst_enc->primary->active_device = mst_enc->primary->devices & mst_enc->connector->devices;
> -       DRM_DEBUG_KMS("setting active device to %08x from %08x %08x for encoder %d\n",
> -                     mst_enc->primary->active_device, mst_enc->primary->devices,
> -                     mst_enc->connector->devices, mst_enc->primary->base.encoder_type);
> -
> -
> -       drm_mode_set_crtcinfo(adjusted_mode, 0);
> -       dig_connector = mst_enc->connector->con_priv;
> -       dig_connector->dp_lane_count = drm_dp_max_lane_count(dig_connector->dpcd);
> -       dig_connector->dp_clock = drm_dp_max_link_rate(dig_connector->dpcd);
> -       DRM_DEBUG_KMS("dig clock %p %d %d\n", dig_connector,
> -                     dig_connector->dp_lane_count, dig_connector->dp_clock);
> -       return true;
> -}
> -
> -static void radeon_mst_encoder_prepare(struct drm_encoder *encoder)
> -{
> -       struct radeon_connector *radeon_connector;
> -       struct radeon_encoder *radeon_encoder, *primary;
> -       struct radeon_encoder_mst *mst_enc;
> -       struct radeon_encoder_atom_dig *dig_enc;
> -
> -       radeon_connector = radeon_mst_find_connector(encoder);
> -       if (!radeon_connector) {
> -               DRM_DEBUG_KMS("failed to find connector %p\n", encoder);
> -               return;
> -       }
> -       radeon_encoder = to_radeon_encoder(encoder);
> -
> -       radeon_mst_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
> -
> -       mst_enc = radeon_encoder->enc_priv;
> -
> -       primary = mst_enc->primary;
> -
> -       dig_enc = primary->enc_priv;
> -
> -       mst_enc->port = radeon_connector->port;
> -
> -       if (dig_enc->dig_encoder == -1) {
> -               dig_enc->dig_encoder = radeon_atom_pick_dig_encoder(&primary->base, -1);
> -               primary->offset = radeon_atom_set_enc_offset(dig_enc->dig_encoder);
> -               atombios_set_mst_encoder_crtc_source(encoder, dig_enc->dig_encoder);
> -
> -
> -       }
> -       DRM_DEBUG_KMS("%d %d\n", dig_enc->dig_encoder, primary->offset);
> -}
> -
> -static void
> -radeon_mst_encoder_mode_set(struct drm_encoder *encoder,
> -                            struct drm_display_mode *mode,
> -                            struct drm_display_mode *adjusted_mode)
> -{
> -       DRM_DEBUG_KMS("\n");
> -}
> -
> -static void radeon_mst_encoder_commit(struct drm_encoder *encoder)
> -{
> -       radeon_mst_encoder_dpms(encoder, DRM_MODE_DPMS_ON);
> -       DRM_DEBUG_KMS("\n");
> -}
> -
> -static const struct drm_encoder_helper_funcs radeon_mst_helper_funcs = {
> -       .dpms = radeon_mst_encoder_dpms,
> -       .mode_fixup = radeon_mst_mode_fixup,
> -       .prepare = radeon_mst_encoder_prepare,
> -       .mode_set = radeon_mst_encoder_mode_set,
> -       .commit = radeon_mst_encoder_commit,
> -};
> -
> -static void radeon_dp_mst_encoder_destroy(struct drm_encoder *encoder)
> -{
> -       drm_encoder_cleanup(encoder);
> -       kfree(encoder);
> -}
> -
> -static const struct drm_encoder_funcs radeon_dp_mst_enc_funcs = {
> -       .destroy = radeon_dp_mst_encoder_destroy,
> -};
> -
> -static struct radeon_encoder *
> -radeon_dp_create_fake_mst_encoder(struct radeon_connector *connector)
> -{
> -       struct drm_device *dev = connector->base.dev;
> -       struct radeon_device *rdev = dev->dev_private;
> -       struct radeon_encoder *radeon_encoder;
> -       struct radeon_encoder_mst *mst_enc;
> -       struct drm_encoder *encoder;
> -       const struct drm_connector_helper_funcs *connector_funcs = connector->base.helper_private;
> -       struct drm_encoder *enc_master = connector_funcs->best_encoder(&connector->base);
> -
> -       DRM_DEBUG_KMS("enc master is %p\n", enc_master);
> -       radeon_encoder = kzalloc(sizeof(*radeon_encoder), GFP_KERNEL);
> -       if (!radeon_encoder)
> -               return NULL;
> -
> -       radeon_encoder->enc_priv = kzalloc(sizeof(*mst_enc), GFP_KERNEL);
> -       if (!radeon_encoder->enc_priv) {
> -               kfree(radeon_encoder);
> -               return NULL;
> -       }
> -       encoder = &radeon_encoder->base;
> -       switch (rdev->num_crtc) {
> -       case 1:
> -               encoder->possible_crtcs = 0x1;
> -               break;
> -       case 2:
> -       default:
> -               encoder->possible_crtcs = 0x3;
> -               break;
> -       case 4:
> -               encoder->possible_crtcs = 0xf;
> -               break;
> -       case 6:
> -               encoder->possible_crtcs = 0x3f;
> -               break;
> -       }
> -
> -       drm_encoder_init(dev, &radeon_encoder->base, &radeon_dp_mst_enc_funcs,
> -                        DRM_MODE_ENCODER_DPMST, NULL);
> -       drm_encoder_helper_add(encoder, &radeon_mst_helper_funcs);
> -
> -       mst_enc = radeon_encoder->enc_priv;
> -       mst_enc->connector = connector;
> -       mst_enc->primary = to_radeon_encoder(enc_master);
> -       radeon_encoder->is_mst_encoder = true;
> -       return radeon_encoder;
> -}
> -
> -int
> -radeon_dp_mst_init(struct radeon_connector *radeon_connector)
> -{
> -       struct drm_device *dev = radeon_connector->base.dev;
> -       int max_link_rate;
> -
> -       if (!radeon_connector->ddc_bus->has_aux)
> -               return 0;
> -
> -       if (radeon_connector_is_dp12_capable(&radeon_connector->base))
> -               max_link_rate = 0x14;
> -       else
> -               max_link_rate = 0x0a;
> -
> -       radeon_connector->mst_mgr.cbs = &mst_cbs;
> -       return drm_dp_mst_topology_mgr_init(&radeon_connector->mst_mgr, dev,
> -                                           &radeon_connector->ddc_bus->aux, 16, 6,
> -                                           4, drm_dp_bw_code_to_link_rate(max_link_rate),
> -                                           radeon_connector->base.base.id);
> -}
> -
> -int
> -radeon_dp_mst_probe(struct radeon_connector *radeon_connector)
> -{
> -       struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv;
> -       struct drm_device *dev = radeon_connector->base.dev;
> -       struct radeon_device *rdev = dev->dev_private;
> -       int ret;
> -       u8 msg[1];
> -
> -       if (!radeon_mst)
> -               return 0;
> -
> -       if (!ASIC_IS_DCE5(rdev))
> -               return 0;
> -
> -       if (dig_connector->dpcd[DP_DPCD_REV] < 0x12)
> -               return 0;
> -
> -       ret = drm_dp_dpcd_read(&radeon_connector->ddc_bus->aux, DP_MSTM_CAP, msg,
> -                              1);
> -       if (ret) {
> -               if (msg[0] & DP_MST_CAP) {
> -                       DRM_DEBUG_KMS("Sink is MST capable\n");
> -                       dig_connector->is_mst = true;
> -               } else {
> -                       DRM_DEBUG_KMS("Sink is not MST capable\n");
> -                       dig_connector->is_mst = false;
> -               }
> -
> -       }
> -       drm_dp_mst_topology_mgr_set_mst(&radeon_connector->mst_mgr,
> -                                       dig_connector->is_mst);
> -       return dig_connector->is_mst;
> -}
> -
> -int
> -radeon_dp_mst_check_status(struct radeon_connector *radeon_connector)
> -{
> -       struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv;
> -       int retry;
> -
> -       if (dig_connector->is_mst) {
> -               u8 esi[16] = { 0 };
> -               int dret;
> -               int ret = 0;
> -               bool handled;
> -
> -               dret = drm_dp_dpcd_read(&radeon_connector->ddc_bus->aux,
> -                                      DP_SINK_COUNT_ESI, esi, 8);
> -go_again:
> -               if (dret == 8) {
> -                       DRM_DEBUG_KMS("got esi %3ph\n", esi);
> -                       ret = drm_dp_mst_hpd_irq(&radeon_connector->mst_mgr, esi, &handled);
> -
> -                       if (handled) {
> -                               for (retry = 0; retry < 3; retry++) {
> -                                       int wret;
> -                                       wret = drm_dp_dpcd_write(&radeon_connector->ddc_bus->aux,
> -                                                                DP_SINK_COUNT_ESI + 1, &esi[1], 3);
> -                                       if (wret == 3)
> -                                               break;
> -                               }
> -
> -                               dret = drm_dp_dpcd_read(&radeon_connector->ddc_bus->aux,
> -                                                       DP_SINK_COUNT_ESI, esi, 8);
> -                               if (dret == 8) {
> -                                       DRM_DEBUG_KMS("got esi2 %3ph\n", esi);
> -                                       goto go_again;
> -                               }
> -                       } else
> -                               ret = 0;
> -
> -                       return ret;
> -               } else {
> -                       DRM_DEBUG_KMS("failed to get ESI - device may have failed %d\n", ret);
> -                       dig_connector->is_mst = false;
> -                       drm_dp_mst_topology_mgr_set_mst(&radeon_connector->mst_mgr,
> -                                                       dig_connector->is_mst);
> -                       /* send a hotplug event */
> -               }
> -       }
> -       return -EINVAL;
> -}
> -
> -#if defined(CONFIG_DEBUG_FS)
> -
> -static int radeon_debugfs_mst_info_show(struct seq_file *m, void *unused)
> -{
> -       struct radeon_device *rdev = (struct radeon_device *)m->private;
> -       struct drm_device *dev = rdev->ddev;
> -       struct drm_connector *connector;
> -       struct radeon_connector *radeon_connector;
> -       struct radeon_connector_atom_dig *dig_connector;
> -       int i;
> -
> -       drm_modeset_lock_all(dev);
> -       list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
> -               if (connector->connector_type != DRM_MODE_CONNECTOR_DisplayPort)
> -                       continue;
> -
> -               radeon_connector = to_radeon_connector(connector);
> -               dig_connector = radeon_connector->con_priv;
> -               if (radeon_connector->is_mst_connector)
> -                       continue;
> -               if (!dig_connector->is_mst)
> -                       continue;
> -               drm_dp_mst_dump_topology(m, &radeon_connector->mst_mgr);
> -
> -               for (i = 0; i < radeon_connector->enabled_attribs; i++)
> -                       seq_printf(m, "attrib %d: %d %d\n", i,
> -                                  radeon_connector->cur_stream_attribs[i].fe,
> -                                  radeon_connector->cur_stream_attribs[i].slots);
> -       }
> -       drm_modeset_unlock_all(dev);
> -       return 0;
> -}
> -
> -DEFINE_SHOW_ATTRIBUTE(radeon_debugfs_mst_info);
> -#endif
> -
> -void radeon_mst_debugfs_init(struct radeon_device *rdev)
> -{
> -#if defined(CONFIG_DEBUG_FS)
> -       struct dentry *root = rdev->ddev->primary->debugfs_root;
> -
> -       debugfs_create_file("radeon_mst_info", 0444, root, rdev,
> -                           &radeon_debugfs_mst_info_fops);
> -
> -#endif
> -}
> diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c
> index 956c72b5aa33..a28d5ceab628 100644
> --- a/drivers/gpu/drm/radeon/radeon_drv.c
> +++ b/drivers/gpu/drm/radeon/radeon_drv.c
> @@ -172,7 +172,6 @@ int radeon_use_pflipirq = 2;
>  int radeon_bapm = -1;
>  int radeon_backlight = -1;
>  int radeon_auxch = -1;
> -int radeon_mst = 0;
>  int radeon_uvd = 1;
>  int radeon_vce = 1;
>
> @@ -263,9 +262,6 @@ module_param_named(backlight, radeon_backlight, int, 0444);
>  MODULE_PARM_DESC(auxch, "Use native auxch experimental support (1 = enable, 0 = disable, -1 = auto)");
>  module_param_named(auxch, radeon_auxch, int, 0444);
>
> -MODULE_PARM_DESC(mst, "DisplayPort MST experimental support (1 = enable, 0 = disable)");
> -module_param_named(mst, radeon_mst, int, 0444);
> -
>  MODULE_PARM_DESC(uvd, "uvd enable/disable uvd support (1 = enable, 0 = disable)");
>  module_param_named(uvd, radeon_uvd, int, 0444);
>
> diff --git a/drivers/gpu/drm/radeon/radeon_encoders.c b/drivers/gpu/drm/radeon/radeon_encoders.c
> index 46549d5179ee..35c535e48b8d 100644
> --- a/drivers/gpu/drm/radeon/radeon_encoders.c
> +++ b/drivers/gpu/drm/radeon/radeon_encoders.c
> @@ -244,16 +244,7 @@ radeon_get_connector_for_encoder(struct drm_encoder *encoder)
>
>         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
>                 radeon_connector = to_radeon_connector(connector);
> -               if (radeon_encoder->is_mst_encoder) {
> -                       struct radeon_encoder_mst *mst_enc;
> -
> -                       if (!radeon_connector->is_mst_connector)
> -                               continue;
> -
> -                       mst_enc = radeon_encoder->enc_priv;
> -                       if (mst_enc->connector == radeon_connector->mst_port)
> -                               return connector;
> -               } else if (radeon_encoder->active_device & radeon_connector->devices)
> +               if (radeon_encoder->active_device & radeon_connector->devices)
>                         return connector;
>         }
>         return NULL;
> @@ -399,9 +390,6 @@ bool radeon_dig_monitor_is_duallink(struct drm_encoder *encoder,
>         case DRM_MODE_CONNECTOR_DVID:
>         case DRM_MODE_CONNECTOR_HDMIA:
>         case DRM_MODE_CONNECTOR_DisplayPort:
> -               if (radeon_connector->is_mst_connector)
> -                       return false;
> -
>                 dig_connector = radeon_connector->con_priv;
>                 if ((dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT) ||
>                     (dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_eDP))
> diff --git a/drivers/gpu/drm/radeon/radeon_irq_kms.c b/drivers/gpu/drm/radeon/radeon_irq_kms.c
> index 3907785d0798..da2173435edd 100644
> --- a/drivers/gpu/drm/radeon/radeon_irq_kms.c
> +++ b/drivers/gpu/drm/radeon/radeon_irq_kms.c
> @@ -100,16 +100,8 @@ static void radeon_hotplug_work_func(struct work_struct *work)
>
>  static void radeon_dp_work_func(struct work_struct *work)
>  {
> -       struct radeon_device *rdev = container_of(work, struct radeon_device,
> -                                                 dp_work);
> -       struct drm_device *dev = rdev->ddev;
> -       struct drm_mode_config *mode_config = &dev->mode_config;
> -       struct drm_connector *connector;
> -
> -       /* this should take a mutex */
> -       list_for_each_entry(connector, &mode_config->connector_list, head)
> -               radeon_connector_hotplug(connector);
>  }
> +
>  /**
>   * radeon_driver_irq_preinstall_kms - drm irq preinstall callback
>   *
> diff --git a/drivers/gpu/drm/radeon/radeon_mode.h b/drivers/gpu/drm/radeon/radeon_mode.h
> index 3485e7f142e9..fc98361bd7a3 100644
> --- a/drivers/gpu/drm/radeon/radeon_mode.h
> +++ b/drivers/gpu/drm/radeon/radeon_mode.h
> @@ -31,7 +31,6 @@
>  #define RADEON_MODE_H
>
>  #include <drm/display/drm_dp_helper.h>
> -#include <drm/display/drm_dp_mst_helper.h>
>  #include <drm/drm_crtc.h>
>  #include <drm/drm_edid.h>
>  #include <drm/drm_encoder.h>
> @@ -440,24 +439,12 @@ struct radeon_encoder_atom_dig {
>         int panel_mode;
>         struct radeon_afmt *afmt;
>         struct r600_audio_pin *pin;
> -       int active_mst_links;
>  };
>
>  struct radeon_encoder_atom_dac {
>         enum radeon_tv_std tv_std;
>  };
>
> -struct radeon_encoder_mst {
> -       int crtc;
> -       struct radeon_encoder *primary;
> -       struct radeon_connector *connector;
> -       struct drm_dp_mst_port *port;
> -       int pbn;
> -       int fe;
> -       bool fe_from_be;
> -       bool enc_active;
> -};
> -
>  struct radeon_encoder {
>         struct drm_encoder base;
>         uint32_t encoder_enum;
> @@ -479,8 +466,6 @@ struct radeon_encoder {
>         enum radeon_output_csc output_csc;
>         bool can_mst;
>         uint32_t offset;
> -       bool is_mst_encoder;
> -       /* front end for this mst encoder */
>  };
>
>  struct radeon_connector_atom_dig {
> @@ -491,7 +476,6 @@ struct radeon_connector_atom_dig {
>         int dp_clock;
>         int dp_lane_count;
>         bool edp_on;
> -       bool is_mst;
>  };
>
>  struct radeon_gpio_rec {
> @@ -535,11 +519,6 @@ enum radeon_connector_dither {
>         RADEON_FMT_DITHER_ENABLE = 1,
>  };
>
> -struct stream_attribs {
> -       uint16_t fe;
> -       uint16_t slots;
> -};
> -
>  struct radeon_connector {
>         struct drm_connector base;
>         uint32_t connector_id;
> @@ -562,14 +541,6 @@ struct radeon_connector {
>         enum radeon_connector_audio audio;
>         enum radeon_connector_dither dither;
>         int pixelclock_for_modeset;
> -       bool is_mst_connector;
> -       struct radeon_connector *mst_port;
> -       struct drm_dp_mst_port *port;
> -       struct drm_dp_mst_topology_mgr mst_mgr;
> -
> -       struct radeon_encoder *mst_encoder;
> -       struct stream_attribs cur_stream_attribs[6];
> -       int enabled_attribs;
>  };
>
>  #define ENCODER_MODE_IS_DP(em) (((em) == ATOM_ENCODER_MODE_DP) || \
> @@ -771,8 +742,6 @@ extern void atombios_dig_transmitter_setup(struct drm_encoder *encoder,
>  extern void atombios_dig_transmitter_setup2(struct drm_encoder *encoder,
>                                             int action, uint8_t lane_num,
>                                             uint8_t lane_set, int fe);
> -extern void atombios_set_mst_encoder_crtc_source(struct drm_encoder *encoder,
> -                                                int fe);
>  extern void radeon_atom_ext_encoder_setup_ddc(struct drm_encoder *encoder);
>  extern struct drm_encoder *radeon_get_external_encoder(struct drm_encoder *encoder);
>  void radeon_atom_copy_swap(u8 *dst, u8 *src, u8 num_bytes, bool to_le);
> @@ -990,15 +959,6 @@ void radeon_crtc_handle_flip(struct radeon_device *rdev, int crtc_id);
>
>  int radeon_align_pitch(struct radeon_device *rdev, int width, int bpp, bool tiled);
>
> -/* mst */
> -int radeon_dp_mst_init(struct radeon_connector *radeon_connector);
> -int radeon_dp_mst_probe(struct radeon_connector *radeon_connector);
> -int radeon_dp_mst_check_status(struct radeon_connector *radeon_connector);
> -void radeon_mst_debugfs_init(struct radeon_device *rdev);
> -void radeon_dp_mst_prepare_pll(struct drm_crtc *crtc, struct drm_display_mode *mode);
> -
> -void radeon_setup_mst_connector(struct drm_device *dev);
> -
>  int radeon_atom_pick_dig_encoder(struct drm_encoder *encoder, int fe_idx);
>  void radeon_atom_release_dig_encoder(struct radeon_device *rdev, int enc_idx);
>  #endif
> --
> 2.35.3
>




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