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drm/i915/dp_mst: Fix disabling the minimum HBlank time

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Disable the minimum HBlank time only on LNL+, where this functionality
and corresponding register exists.

Bspec: 74379
Fixes: a5ebe00c2a ("drm/i915/dp: Guarantee a minimum HBlank time")
Cc: Arun R Murthy <arun.r.murthy@intel.com>
Cc: Suraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250206164624.3185280-1-imre.deak@intel.com
This commit is contained in:
Imre Deak
2025-02-06 18:46:24 +02:00
parent 19214cd747
commit 9e35a4edb8
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/i915/display/intel_dp_mst.c
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@@ -1006,7 +1006,8 @@ static void mst_stream_disable(struct intel_atomic_state *state,
intel_dp_sink_disable_decompression(state, connector, old_crtc_state);
intel_de_write(display, DP_MIN_HBLANK_CTL(trans), 0x00);
if (DISPLAY_VER(display) >= 20)
intel_de_write(display, DP_MIN_HBLANK_CTL(trans), 0);
}
static void mst_stream_post_disable(struct intel_atomic_state *state,