[PATCH 6/8] drm/i915/scaler: Pimp scaler debugs

[Gustavo Sousa]

Quoting Ville Syrjala (2024-12-19 10:08:25-03:00)
>From: Ville Syrjälä <ville.syrjala at linux.intel.com>
>
>Include the standard "[CRTC:...]" information in the scaler debugs
>to make life easier.

Drive-by comment (and going a bit off-topic):

    $ git grep '\[[A-Z]\+:%d:%s]' -- drivers/gpu/drm | wc -l
    600

Has someone already considered creating DRM_*_FMT and DRM_*_ARG() for
those? E.g. DRM_CRTC_FMT and CRM_CRTC_ARG(crtc->base), which, IMO, would
be easier to use and arguably more concise.

I tried doing a quick search on lore.kernel.org/dri-devel, but I'm not
sure what would be good search terms to find previous attempts to see
possible arguments against it.

--
Gustavo Sousa

>
>Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
>---
> drivers/gpu/drm/i915/display/skl_scaler.c | 25 +++++++++++++++--------
> 1 file changed, 16 insertions(+), 9 deletions(-)
>
>diff --git a/drivers/gpu/drm/i915/display/skl_scaler.c b/drivers/gpu/drm/i915/display/skl_scaler.c
>index cbc71e44fcbb..f6d76ef1a854 100644
>--- a/drivers/gpu/drm/i915/display/skl_scaler.c
>+++ b/drivers/gpu/drm/i915/display/skl_scaler.c
>@@ -166,7 +166,8 @@ skl_update_scaler(struct intel_crtc_state *crtc_state, bool force_detach,
>         if (DISPLAY_VER(display) >= 9 && crtc_state->hw.enable &&
>             need_scaler && adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) {
>                 drm_dbg_kms(display->drm,
>-                            "Pipe/Plane scaling not supported with IF-ID mode\n");
>+                            "[CRTC:%d:%s] scaling not supported with IF-ID mode\n",
>+                            crtc->base.base.id, crtc->base.name);
>                 return -EINVAL;
>         }
> 
>@@ -186,8 +187,9 @@ skl_update_scaler(struct intel_crtc_state *crtc_state, bool force_detach,
>                         scaler_state->scalers[*scaler_id].in_use = false;
> 
>                         drm_dbg_kms(display->drm,
>-                                    "scaler_user index %u.%u: "
>+                                    "[CRTC:%d:%s] scaler_user index %u.%u: "
>                                     "Staged freeing scaler id %d scaler_users = 0x%x\n",
>+                                    crtc->base.base.id, crtc->base.name,
>                                     crtc->pipe, scaler_user, *scaler_id,
>                                     scaler_state->scaler_users);
>                         *scaler_id = -1;
>@@ -207,8 +209,9 @@ skl_update_scaler(struct intel_crtc_state *crtc_state, bool force_detach,
>             src_w > max_src_w || src_h > max_src_h ||
>             dst_w > max_dst_w || dst_h > max_dst_h) {
>                 drm_dbg_kms(display->drm,
>-                            "scaler_user index %u.%u: src %ux%u dst %ux%u "
>+                            "[CRTC:%d:%s] scaler_user index %u.%u: src %ux%u dst %ux%u "
>                             "size is out of scaler range\n",
>+                            crtc->base.base.id, crtc->base.name,
>                             crtc->pipe, scaler_user, src_w, src_h,
>                             dst_w, dst_h);
>                 return -EINVAL;
>@@ -224,16 +227,18 @@ skl_update_scaler(struct intel_crtc_state *crtc_state, bool force_detach,
>          */
>         if (pipe_src_w > max_dst_w || pipe_src_h > max_dst_h) {
>                 drm_dbg_kms(display->drm,
>-                            "scaler_user index %u.%u: pipe src size %ux%u "
>+                            "[CRTC:%d:%s] scaler_user index %u.%u: pipe src size %ux%u "
>                             "is out of scaler range\n",
>+                            crtc->base.base.id, crtc->base.name,
>                             crtc->pipe, scaler_user, pipe_src_w, pipe_src_h);
>                 return -EINVAL;
>         }
> 
>         /* mark this plane as a scaler user in crtc_state */
>         scaler_state->scaler_users |= (1 << scaler_user);
>-        drm_dbg_kms(display->drm, "scaler_user index %u.%u: "
>+        drm_dbg_kms(display->drm, "[CRTC:%d:%s] scaler_user index %u.%u: "
>                     "staged scaling request for %ux%u->%ux%u scaler_users = 0x%x\n",
>+                    crtc->base.base.id, crtc->base.name,
>                     crtc->pipe, scaler_user, src_w, src_h, dst_w, dst_h,
>                     scaler_state->scaler_users);
> 
>@@ -421,8 +426,8 @@ static int intel_atomic_setup_scaler(struct intel_crtc_scaler_state *scaler_stat
> 
>                 if (hscale < 0 || vscale < 0) {
>                         drm_dbg_kms(display->drm,
>-                                    "Scaler %d doesn't support required plane scaling\n",
>-                                    *scaler_id);
>+                                    "[CRTC:%d:%s] scaler %d doesn't support required plane scaling\n",
>+                                    crtc->base.base.id, crtc->base.name, *scaler_id);
>                         drm_rect_debug_print("src: ", src, true);
>                         drm_rect_debug_print("dst: ", dst, false);
> 
>@@ -430,7 +435,8 @@ static int intel_atomic_setup_scaler(struct intel_crtc_scaler_state *scaler_stat
>                 }
>         }
> 
>-        drm_dbg_kms(display->drm, "Attached scaler id %u.%u to %s:%d\n",
>+        drm_dbg_kms(display->drm, "[CRTC:%d:%s] attached scaler id %u.%u to %s:%d\n",
>+                    crtc->base.base.id, crtc->base.name,
>                     crtc->pipe, *scaler_id, name, idx);
>         scaler_state->scalers[*scaler_id].mode = mode;
> 
>@@ -530,7 +536,8 @@ int intel_atomic_setup_scalers(struct intel_atomic_state *state,
>         /* fail if required scalers > available scalers */
>         if (num_scalers_need > crtc->num_scalers) {
>                 drm_dbg_kms(display->drm,
>-                            "Too many scaling requests %d > %d\n",
>+                            "[CRTC:%d:%s] too many scaling requests %d > %d\n",
>+                            crtc->base.base.id, crtc->base.name,
>                             num_scalers_need, crtc->num_scalers);
>                 return -EINVAL;
>         }
>-- 
>2.45.2
>