> -Original Message-
> From: Intel-gfx On Behalf Of Ville
> Syrjala
> Sent: Wednesday, March 27, 2024 11:16 PM
> To: intel-gfx@lists.freedesktop.org
> Subject: [PATCH 09/13] drm/i915: Add debugs for mbus joining and dbuf ratio
> programming
Looks Good to me.
Reviewed-by: Uma Shankar
> From: Ville Syrjälä
>
> Add some debugs so that we can actually observe what is actually happening
> during the mbus/dbuf programming steps.
> We can just shove them into fairly low level functions as none of them are
> called
> during any critical sections/etc.
>
> Signed-off-by: Ville Syrjälä
> ---
> drivers/gpu/drm/i915/display/skl_watermark.c | 9 +
> 1 file changed, 9 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/display/skl_watermark.c
> b/drivers/gpu/drm/i915/display/skl_watermark.c
> index 7767c5eada36..a118ecf9e532 100644
> --- a/drivers/gpu/drm/i915/display/skl_watermark.c
> +++ b/drivers/gpu/drm/i915/display/skl_watermark.c
> @@ -3647,6 +3647,9 @@ void intel_dbuf_mdclk_cdclk_ratio_update(struct
> drm_i915_private *i915, u8 ratio
> if (joined_mbus)
> ratio *= 2;
>
> + drm_dbg_kms(>drm, "Updating dbuf ratio to %d (mbus joined:
> %s)\n",
> + ratio, str_yes_no(joined_mbus));
> +
> for_each_dbuf_slice(i915, slice)
> intel_de_rmw(i915, DBUF_CTL_S(slice),
>DBUF_MIN_TRACKER_STATE_SERVICE_MASK,
> @@ -3680,10 +3683,16 @@ static void
> intel_dbuf_mdclk_min_tracker_update(struct intel_atomic_state *state static
> void intel_dbuf_mbus_join_update(struct intel_atomic_state *state) {
> struct drm_i915_private *i915 = to_i915(state->base.dev);
> + const struct intel_dbuf_state *old_dbuf_state =
> + intel_atomic_get_old_dbuf_state(state);
> const struct intel_dbuf_state *new_dbuf_state =
> intel_atomic_get_new_dbuf_state(state);
> u32 mbus_ctl;
>
> + drm_dbg_kms(>drm, "Changing mbus joined: %s -> %s\n",
> + str_yes_no(old_dbuf_state->joined_mbus),
> + str_yes_no(new_dbuf_state->joined_mbus));
> +
> /*
>* TODO: Implement vblank synchronized MBUS joining changes.
>* Must be properly coordinated with dbuf reprogramming.
> --
> 2.43.2
