The early check for compressed_bpp being zero is too early, as it is hit
also when DSC is not enabled. Move the checks down to where the values
are actually needed. This is a paranoid check for a situation that
should not happen, so we don't really care about handling it gracefully
apart from not oopsing.
Fixes: 48b8b04c791d ("drm/i915/display: Enable DP Display Audio WA")
Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/1750
Cc: Anshuman Gupta <anshuman.gupta@xxxxxxxxx>
Cc: Uma Shankar <uma.shankar@xxxxxxxxx>
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_audio.c | 15 +++++----------
1 file changed, 5 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_audio.c b/drivers/gpu/drm/i915/display/intel_audio.c
index 2663e71059af..36aaee8536f1 100644
--- a/drivers/gpu/drm/i915/display/intel_audio.c
+++ b/drivers/gpu/drm/i915/display/intel_audio.c
@@ -542,6 +542,10 @@ static unsigned int get_hblank_early_enable_config(struct intel_encoder *encoder
h_active, crtc_state->port_clock, crtc_state->lane_count,
vdsc_bpp, cdclk);
+ if (WARN_ON(!crtc_state->port_clock || !crtc_state->lane_count ||
+ !crtc_state->dsc.compressed_bpp || !i915->cdclk.hw.cdclk))
+ return 0;
+
link_clks_available = ((((h_total - h_active) *
((crtc_state->port_clock * ROUNDING_FACTOR) /
pixel_clk)) / ROUNDING_FACTOR) - 28);
@@ -597,21 +601,12 @@ static void enable_audio_dsc_wa(struct intel_encoder *encoder,
struct drm_i915_private *i915 = to_i915(encoder->base.dev);
struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
enum pipe pipe = crtc->pipe;
- unsigned int hblank_early_prog, samples_room, h_active;
+ unsigned int hblank_early_prog, samples_room;
unsigned int val;
if (INTEL_GEN(i915) < 11)
return;
- h_active = crtc_state->hw.adjusted_mode.hdisplay;
-
- if (!(h_active && crtc_state->port_clock && crtc_state->lane_count &&
- crtc_state->dsc.compressed_bpp && i915->cdclk.hw.cdclk)) {
- drm_err(&i915->drm, "Null Params rcvd for hblank early enabling\n");
- WARN_ON(1);
- return;
- }
-
val = intel_de_read(i915, AUD_CONFIG_BE);
if (INTEL_GEN(i915) == 11)
--
2.20.1
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