On Wed, 2023-11-08 at 12:53 +0530, Animesh Manna wrote:
> Add debugfs support which will print source and sink status
> per connector basis. Existing i915_psr_status and
> i915_psr_sink_status will be used to get the source and
> sink status of panel replay.
>
> v1: Initial version. [rb-ed by Arun]
> v2: Added check for DP 2.0 and connector type in
> connector_debugfs_add().
> v3: Optimization and cosmetic changes. [Jouni]
>
> Cc: Jouni Högander <jouni.hogander@xxxxxxxxx>
> Cc: Arun R Murthy <arun.r.murthy@xxxxxxxxx>
> Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
> Reviewed-by: Arun R Murthy <arun.r.murthy@xxxxxxxxx>
> Signed-off-by: Animesh Manna <animesh.manna@xxxxxxxxx>
Reviewed-by: Jouni Högander <jouni.hogander@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/display/intel_psr.c | 87 +++++++++++++++++-----
> --
> 1 file changed, 63 insertions(+), 24 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_psr.c
> b/drivers/gpu/drm/i915/display/intel_psr.c
> index ea292832ca47..b0e46fe4bfac 100644
> --- a/drivers/gpu/drm/i915/display/intel_psr.c
> +++ b/drivers/gpu/drm/i915/display/intel_psr.c
> @@ -2865,12 +2865,19 @@ static int
> psr_get_status_and_error_status(struct intel_dp *intel_dp,
> {
> struct drm_dp_aux *aux = &intel_dp->aux;
> int ret;
> + unsigned int offset;
>
> - ret = drm_dp_dpcd_readb(aux, DP_PSR_STATUS, status);
> + offset = intel_dp->psr.panel_replay_enabled ?
> + DP_SINK_DEVICE_PR_AND_FRAME_LOCK_STATUS :
> DP_PSR_STATUS;
> +
> + ret = drm_dp_dpcd_readb(aux, offset, status);
> if (ret != 1)
> return ret;
>
> - ret = drm_dp_dpcd_readb(aux, DP_PSR_ERROR_STATUS,
> error_status);
> + offset = intel_dp->psr.panel_replay_enabled ?
> + DP_PANEL_REPLAY_ERROR_STATUS : DP_PSR_ERROR_STATUS;
> +
> + ret = drm_dp_dpcd_readb(aux, offset, error_status);
> if (ret != 1)
> return ret;
>
> @@ -3091,7 +3098,7 @@ psr_source_status(struct intel_dp *intel_dp,
> struct seq_file *m)
> status = live_status[status_val];
> }
>
> - seq_printf(m, "Source PSR status: %s [0x%08x]\n", status,
> val);
> + seq_printf(m, "Source PSR/PanelReplay status: %s [0x%08x]\n",
> status, val);
> }
>
> static int intel_psr_status(struct seq_file *m, struct intel_dp
> *intel_dp)
> @@ -3104,18 +3111,22 @@ static int intel_psr_status(struct seq_file
> *m, struct intel_dp *intel_dp)
> bool enabled;
> u32 val;
>
> - seq_printf(m, "Sink support: %s", str_yes_no(psr-
> >sink_support));
> + seq_printf(m, "Sink support: PSR = %s",
> + str_yes_no(psr->sink_support));
> +
> if (psr->sink_support)
> seq_printf(m, " [0x%02x]", intel_dp->psr_dpcd[0]);
> - seq_puts(m, "\n");
> + seq_printf(m, ", Panel Replay = %s\n", str_yes_no(psr-
> >sink_panel_replay_support));
>
> - if (!psr->sink_support)
> + if (!(psr->sink_support || psr->sink_panel_replay_support))
> return 0;
>
> wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm);
> mutex_lock(&psr->lock);
>
> - if (psr->enabled)
> + if (psr->panel_replay_enabled)
> + status = "Panel Replay Enabled";
> + else if (psr->enabled)
> status = psr->psr2_enabled ? "PSR2 enabled" : "PSR1
> enabled";
> else
> status = "disabled";
> @@ -3128,14 +3139,17 @@ static int intel_psr_status(struct seq_file
> *m, struct intel_dp *intel_dp)
> goto unlock;
> }
>
> - if (psr->psr2_enabled) {
> + if (psr->panel_replay_enabled) {
> + val = intel_de_read(dev_priv,
> TRANS_DP2_CTL(cpu_transcoder));
> + enabled = val & TRANS_DP2_PANEL_REPLAY_ENABLE;
> + } else if (psr->psr2_enabled) {
> val = intel_de_read(dev_priv,
> EDP_PSR2_CTL(cpu_transcoder));
> enabled = val & EDP_PSR2_ENABLE;
> } else {
> val = intel_de_read(dev_priv, psr_ctl_reg(dev_priv,
> cpu_transcoder));
> enabled = val & EDP_PSR_ENABLE;
> }
> - seq_printf(m, "Source PSR ctl: %s [0x%08x]\n",
> + seq_printf(m, "Source PSR/PanelReplay ctl: %s [0x%08x]\n",
> str_enabled_disabled(enabled), val);
> psr_source_status(intel_dp, m);
> seq_printf(m, "Busy frontbuffer bits: 0x%08x\n",
> @@ -3273,6 +3287,16 @@ void intel_psr_debugfs_register(struct
> drm_i915_private *i915)
> i915, &i915_edp_psr_status_fops);
> }
>
> +static const char *psr_mode_str(struct intel_dp *intel_dp)
> +{
> + if (intel_dp->psr.panel_replay_enabled)
> + return "PANEL-REPLAY";
> + else if (intel_dp->psr.enabled)
> + return "PSR";
> +
> + return "unknown";
> +}
> +
> static int i915_psr_sink_status_show(struct seq_file *m, void *data)
> {
> struct intel_connector *connector = m->private;
> @@ -3287,12 +3311,19 @@ static int i915_psr_sink_status_show(struct
> seq_file *m, void *data)
> "reserved",
> "sink internal error",
> };
> + static const char * const panel_replay_status[] = {
> + "Sink device frame is locked to the Source device",
> + "Sink device is coasting, using the VTotal target",
> + "Sink device is governing the frame rate (frame rate
> unlock is granted)",
> + "Sink device in the process of re-locking with the
> Source device",
> + };
> const char *str;
> int ret;
> u8 status, error_status;
> + u32 idx;
>
> - if (!CAN_PSR(intel_dp)) {
> - seq_puts(m, "PSR Unsupported\n");
> + if (!(CAN_PSR(intel_dp) || CAN_PANEL_REPLAY(intel_dp))) {
> + seq_puts(m, "PSR/Panel-Replay Unsupported\n");
> return -ENODEV;
> }
>
> @@ -3303,15 +3334,20 @@ static int i915_psr_sink_status_show(struct
> seq_file *m, void *data)
> if (ret)
> return ret;
>
> - status &= DP_PSR_SINK_STATE_MASK;
> - if (status < ARRAY_SIZE(sink_status))
> - str = sink_status[status];
> - else
> - str = "unknown";
> + str = "unknown";
> + if (intel_dp->psr.panel_replay_enabled) {
> + idx = (status & DP_SINK_FRAME_LOCKED_MASK) >>
> DP_SINK_FRAME_LOCKED_SHIFT;
> + if (idx < ARRAY_SIZE(panel_replay_status))
> + str = panel_replay_status[idx];
> + } else if (intel_dp->psr.enabled) {
> + idx = status & DP_PSR_SINK_STATE_MASK;
> + if (idx < ARRAY_SIZE(sink_status))
> + str = sink_status[idx];
> + }
>
> - seq_printf(m, "Sink PSR status: 0x%x [%s]\n", status, str);
> + seq_printf(m, "Sink %s status: 0x%x [%s]\n",
> psr_mode_str(intel_dp), status, str);
>
> - seq_printf(m, "Sink PSR error status: 0x%x", error_status);
> + seq_printf(m, "Sink %s error status: 0x%x",
> psr_mode_str(intel_dp), error_status);
>
> if (error_status & (DP_PSR_RFB_STORAGE_ERROR |
> DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR |
> @@ -3320,11 +3356,11 @@ static int i915_psr_sink_status_show(struct
> seq_file *m, void *data)
> else
> seq_puts(m, "\n");
> if (error_status & DP_PSR_RFB_STORAGE_ERROR)
> - seq_puts(m, "\tPSR RFB storage error\n");
> + seq_printf(m, "\t%s RFB storage error\n",
> psr_mode_str(intel_dp));
> if (error_status & DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR)
> - seq_puts(m, "\tPSR VSC SDP uncorrectable error\n");
> + seq_printf(m, "\t%s VSC SDP uncorrectable error\n",
> psr_mode_str(intel_dp));
> if (error_status & DP_PSR_LINK_CRC_ERROR)
> - seq_puts(m, "\tPSR Link CRC error\n");
> + seq_printf(m, "\t%s Link CRC error\n",
> psr_mode_str(intel_dp));
>
> return ret;
> }
> @@ -3344,13 +3380,16 @@ void intel_psr_connector_debugfs_add(struct
> intel_connector *connector)
> struct drm_i915_private *i915 = to_i915(connector->base.dev);
> struct dentry *root = connector->base.debugfs_entry;
>
> - if (connector->base.connector_type != DRM_MODE_CONNECTOR_eDP)
> - return;
> + if (connector->base.connector_type != DRM_MODE_CONNECTOR_eDP)
> {
> + if (!(HAS_DP20(i915) &&
> + connector->base.connector_type ==
> DRM_MODE_CONNECTOR_DisplayPort))
> + return;
> + }
>
> debugfs_create_file("i915_psr_sink_status", 0444, root,
> connector, &i915_psr_sink_status_fops);
>
> - if (HAS_PSR(i915))
> + if (HAS_PSR(i915) || HAS_DP20(i915))
> debugfs_create_file("i915_psr_status", 0444, root,
> connector,
> &i915_psr_status_fops);
> }
