Often getting DBS overflows when starting Xorg or Wayland compositor when running Xe KMD. Issue was reported but nothing was done, so disabling DSB as whole until properly fixed.
Link: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/989 Link: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/1031 Link: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/1072 Cc: Animesh Manna <[email protected]> Cc: Rodrigo Vivi <[email protected]> Signed-off-by: José Roberto de Souza <[email protected]> --- drivers/gpu/drm/i915/display/intel_dsb.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_dsb.c b/drivers/gpu/drm/i915/display/intel_dsb.c index 482c28b5c2de5..bc11c447afe03 100644 --- a/drivers/gpu/drm/i915/display/intel_dsb.c +++ b/drivers/gpu/drm/i915/display/intel_dsb.c @@ -321,6 +321,7 @@ void intel_dsb_finish(struct intel_dsb *dsb) intel_dsb_buffer_flush_map(&dsb->dsb_buf); } +#ifdef I915 static int intel_dsb_dewake_scanline(const struct intel_crtc_state *crtc_state) { struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev); @@ -339,6 +340,7 @@ static int intel_dsb_dewake_scanline(const struct intel_crtc_state *crtc_state) return max(0, vblank_start - intel_usecs_to_scanlines(adjusted_mode, latency)); } +#endif static void _intel_dsb_commit(struct intel_dsb *dsb, u32 ctrl, int dewake_scanline) @@ -444,6 +446,8 @@ void intel_dsb_wait(struct intel_dsb *dsb) struct intel_dsb *intel_dsb_prepare(const struct intel_crtc_state *crtc_state, unsigned int max_cmds) { + /* TODO: DSB is broken in Xe KMD, so disabling it until fixed */ +#ifdef I915 struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); struct drm_i915_private *i915 = to_i915(crtc->base.dev); intel_wakeref_t wakeref; @@ -484,6 +488,7 @@ struct intel_dsb *intel_dsb_prepare(const struct intel_crtc_state *crtc_state, "[CRTC:%d:%s] DSB %d queue setup failed, will fallback to MMIO for display HW programming\n", crtc->base.base.id, crtc->base.name, DSB1); +#endif return NULL; } -- 2.43.0
