1 files changed, 221 insertions, 99 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_dsb.c b/drivers/gpu/drm/i915/display/intel_dsb.c
index da24e041d269..481488d1fe67 100644
--- a/drivers/gpu/drm/i915/display/intel_dsb.c
+++ b/drivers/gpu/drm/i915/display/intel_dsb.c
@@ -4,11 +4,15 @@
  *
  */
 
-#include "i915_drv.h"
+#include <drm/drm_print.h>
+#include <drm/drm_vblank.h>
+
 #include "i915_irq.h"
 #include "i915_reg.h"
+#include "i915_utils.h"
 #include "intel_crtc.h"
 #include "intel_de.h"
+#include "intel_display_rpm.h"
 #include "intel_display_types.h"
 #include "intel_dsb.h"
 #include "intel_dsb_buffer.h"
@@ -37,9 +41,16 @@ struct intel_dsb {
 	unsigned int free_pos;
 
 	/*
-	 * ins_start_offset will help to store start dword of the dsb
-	 * instuction and help in identifying the batch of auto-increment
-	 * register.
+	 * Previously emitted DSB instruction. Used to
+	 * identify/adjust the instruction for indexed
+	 * register writes.
+	 */
+	u32 ins[2];
+
+	/*
+	 * Start of the previously emitted DSB instruction.
+	 * Used to adjust the instruction for indexed
+	 * register writes.
 	 */
 	unsigned int ins_start_offset;
 
@@ -100,32 +111,32 @@ static bool pre_commit_is_vrr_active(struct intel_atomic_state *state,
 	return old_crtc_state->vrr.enable && !intel_crtc_vrr_disabling(state, crtc);
 }
 
-static const struct intel_crtc_state *
-pre_commit_crtc_state(struct intel_atomic_state *state,
-		      struct intel_crtc *crtc)
+static int dsb_vblank_delay(struct intel_atomic_state *state,
+			    struct intel_crtc *crtc)
 {
-	const struct intel_crtc_state *old_crtc_state =
-		intel_atomic_get_old_crtc_state(state, crtc);
-	const struct intel_crtc_state *new_crtc_state =
-		intel_atomic_get_new_crtc_state(state, crtc);
+	const struct intel_crtc_state *crtc_state =
+		intel_pre_commit_crtc_state(state, crtc);
 
-	/*
-	 * During fastsets/etc. the transcoder is still
-	 * running with the old timings at this point.
-	 */
-	if (intel_crtc_needs_modeset(new_crtc_state))
-		return new_crtc_state;
+	if (pre_commit_is_vrr_active(state, crtc))
+		/*
+		 * When the push is sent during vblank it will trigger
+		 * on the next scanline, hence we have up to one extra
+		 * scanline until the delayed vblank occurs after
+		 * TRANS_PUSH has been written.
+		 */
+		return intel_vrr_vblank_delay(crtc_state) + 1;
 	else
-		return old_crtc_state;
+		return intel_mode_vblank_delay(&crtc_state->hw.adjusted_mode);
 }
 
 static int dsb_vtotal(struct intel_atomic_state *state,
 		      struct intel_crtc *crtc)
 {
-	const struct intel_crtc_state *crtc_state = pre_commit_crtc_state(state, crtc);
+	const struct intel_crtc_state *crtc_state =
+		intel_pre_commit_crtc_state(state, crtc);
 
 	if (pre_commit_is_vrr_active(state, crtc))
-		return crtc_state->vrr.vmax;
+		return intel_vrr_vmax_vtotal(crtc_state);
 	else
 		return intel_mode_vtotal(&crtc_state->hw.adjusted_mode);
 }
@@ -133,9 +144,10 @@ static int dsb_vtotal(struct intel_atomic_state *state,
 static int dsb_dewake_scanline_start(struct intel_atomic_state *state,
 				     struct intel_crtc *crtc)
 {
-	const struct intel_crtc_state *crtc_state = pre_commit_crtc_state(state, crtc);
-	struct drm_i915_private *i915 = to_i915(state->base.dev);
-	unsigned int latency = skl_watermark_max_latency(i915, 0);
+	struct intel_display *display = to_intel_display(state);
+	const struct intel_crtc_state *crtc_state =
+		intel_pre_commit_crtc_state(state, crtc);
+	unsigned int latency = skl_watermark_max_latency(display, 0);
 
 	return intel_mode_vdisplay(&crtc_state->hw.adjusted_mode) -
 		intel_usecs_to_scanlines(&crtc_state->hw.adjusted_mode, latency);
@@ -144,7 +156,8 @@ static int dsb_dewake_scanline_start(struct intel_atomic_state *state,
 static int dsb_dewake_scanline_end(struct intel_atomic_state *state,
 				   struct intel_crtc *crtc)
 {
-	const struct intel_crtc_state *crtc_state = pre_commit_crtc_state(state, crtc);
+	const struct intel_crtc_state *crtc_state =
+		intel_pre_commit_crtc_state(state, crtc);
 
 	return intel_mode_vdisplay(&crtc_state->hw.adjusted_mode);
 }
@@ -152,23 +165,33 @@ static int dsb_dewake_scanline_end(struct intel_atomic_state *state,
 static int dsb_scanline_to_hw(struct intel_atomic_state *state,
 			      struct intel_crtc *crtc, int scanline)
 {
-	const struct intel_crtc_state *crtc_state = pre_commit_crtc_state(state, crtc);
+	const struct intel_crtc_state *crtc_state =
+		intel_pre_commit_crtc_state(state, crtc);
 	int vtotal = dsb_vtotal(state, crtc);
 
 	return (scanline + vtotal - intel_crtc_scanline_offset(crtc_state)) % vtotal;
 }
 
+/*
+ * Bspec suggests that we should always set DSB_SKIP_WAITS_EN. We have approach
+ * different from what is explained in Bspec on how flip is considered being
+ * complete. We are waiting for vblank in DSB and generate interrupt when it
+ * happens and this interrupt is considered as indication of completion -> we
+ * definitely do not want to skip vblank wait. We also have concern what comes
+ * to skipping vblank evasion. I.e. arming registers are latched before we have
+ * managed writing them. Due to these reasons we are not setting
+ * DSB_SKIP_WAITS_EN.
+ */
 static u32 dsb_chicken(struct intel_atomic_state *state,
 		       struct intel_crtc *crtc)
 {
 	if (pre_commit_is_vrr_active(state, crtc))
-		return DSB_SKIP_WAITS_EN |
-			DSB_CTRL_WAIT_SAFE_WINDOW |
+		return DSB_CTRL_WAIT_SAFE_WINDOW |
 			DSB_CTRL_NO_WAIT_VBLANK |
 			DSB_INST_WAIT_SAFE_WINDOW |
 			DSB_INST_NO_WAIT_VBLANK;
 	else
-		return DSB_SKIP_WAITS_EN;
+		return 0;
 }
 
 static bool assert_dsb_has_room(struct intel_dsb *dsb)
@@ -215,9 +238,11 @@ static void intel_dsb_emit(struct intel_dsb *dsb, u32 ldw, u32 udw)
 	dsb->free_pos = ALIGN(dsb->free_pos, 2);
 
 	dsb->ins_start_offset = dsb->free_pos;
+	dsb->ins[0] = ldw;
+	dsb->ins[1] = udw;
 
-	intel_dsb_buffer_write(&dsb->dsb_buf, dsb->free_pos++, ldw);
-	intel_dsb_buffer_write(&dsb->dsb_buf, dsb->free_pos++, udw);
+	intel_dsb_buffer_write(&dsb->dsb_buf, dsb->free_pos++, dsb->ins[0]);
+	intel_dsb_buffer_write(&dsb->dsb_buf, dsb->free_pos++, dsb->ins[1]);
 }
 
 static bool intel_dsb_prev_ins_is_write(struct intel_dsb *dsb,
@@ -233,23 +258,12 @@ static bool intel_dsb_prev_ins_is_write(struct intel_dsb *dsb,
 	if (dsb->free_pos == 0)
 		return false;
 
-	prev_opcode = intel_dsb_buffer_read(&dsb->dsb_buf,
-					    dsb->ins_start_offset + 1) & ~DSB_REG_VALUE_MASK;
-	prev_reg =  intel_dsb_buffer_read(&dsb->dsb_buf,
-					  dsb->ins_start_offset + 1) & DSB_REG_VALUE_MASK;
+	prev_opcode = dsb->ins[1] & ~DSB_REG_VALUE_MASK;
+	prev_reg =  dsb->ins[1] & DSB_REG_VALUE_MASK;
 
 	return prev_opcode == opcode && prev_reg == i915_mmio_reg_offset(reg);
 }
 
-static bool intel_dsb_prev_ins_is_mmio_write(struct intel_dsb *dsb, i915_reg_t reg)
-{
-	/* only full byte-enables can be converted to indexed writes */
-	return intel_dsb_prev_ins_is_write(dsb,
-					   DSB_OPCODE_MMIO_WRITE << DSB_OPCODE_SHIFT |
-					   DSB_BYTE_EN << DSB_BYTE_EN_SHIFT,
-					   reg);
-}
-
 static bool intel_dsb_prev_ins_is_indexed_write(struct intel_dsb *dsb, i915_reg_t reg)
 {
 	return intel_dsb_prev_ins_is_write(dsb,
@@ -258,19 +272,21 @@ static bool intel_dsb_prev_ins_is_indexed_write(struct intel_dsb *dsb, i915_reg_
 }
 
 /**
- * intel_dsb_reg_write() - Emit register wriite to the DSB context
+ * intel_dsb_reg_write_indexed() - Emit indexed register write to the DSB context
  * @dsb: DSB context
  * @reg: register address.
  * @val: value.
  *
  * This function is used for writing register-value pair in command
  * buffer of DSB.
+ *
+ * Note that indexed writes are slower than normal MMIO writes
+ * for a small number (less than 5 or so) of writes to the same
+ * register.
  */
-void intel_dsb_reg_write(struct intel_dsb *dsb,
-			 i915_reg_t reg, u32 val)
+void intel_dsb_reg_write_indexed(struct intel_dsb *dsb,
+				 i915_reg_t reg, u32 val)
 {
-	u32 old_val;
-
 	/*
 	 * For example the buffer will look like below for 3 dwords for auto
 	 * increment register:
@@ -287,40 +303,32 @@ void intel_dsb_reg_write(struct intel_dsb *dsb,
 	 * we are writing odd no of dwords, Zeros will be added in the end for
 	 * padding.
 	 */
-	if (!intel_dsb_prev_ins_is_mmio_write(dsb, reg) &&
-	    !intel_dsb_prev_ins_is_indexed_write(dsb, reg)) {
-		intel_dsb_emit(dsb, val,
-			       (DSB_OPCODE_MMIO_WRITE << DSB_OPCODE_SHIFT) |
-			       (DSB_BYTE_EN << DSB_BYTE_EN_SHIFT) |
+	if (!intel_dsb_prev_ins_is_indexed_write(dsb, reg))
+		intel_dsb_emit(dsb, 0, /* count */
+			       (DSB_OPCODE_INDEXED_WRITE << DSB_OPCODE_SHIFT) |
 			       i915_mmio_reg_offset(reg));
-	} else {
-		if (!assert_dsb_has_room(dsb))
-			return;
-
-		/* convert to indexed write? */
-		if (intel_dsb_prev_ins_is_mmio_write(dsb, reg)) {
-			u32 prev_val = intel_dsb_buffer_read(&dsb->dsb_buf,
-							     dsb->ins_start_offset + 0);
-
-			intel_dsb_buffer_write(&dsb->dsb_buf,
-					       dsb->ins_start_offset + 0, 1); /* count */
-			intel_dsb_buffer_write(&dsb->dsb_buf, dsb->ins_start_offset + 1,
-					       (DSB_OPCODE_INDEXED_WRITE << DSB_OPCODE_SHIFT) |
-					       i915_mmio_reg_offset(reg));
-			intel_dsb_buffer_write(&dsb->dsb_buf, dsb->ins_start_offset + 2, prev_val);
-
-			dsb->free_pos++;
-		}
 
-		intel_dsb_buffer_write(&dsb->dsb_buf, dsb->free_pos++, val);
-		/* Update the count */
-		old_val = intel_dsb_buffer_read(&dsb->dsb_buf, dsb->ins_start_offset);
-		intel_dsb_buffer_write(&dsb->dsb_buf, dsb->ins_start_offset, old_val + 1);
+	if (!assert_dsb_has_room(dsb))
+		return;
 
-		/* if number of data words is odd, then the last dword should be 0.*/
-		if (dsb->free_pos & 0x1)
-			intel_dsb_buffer_write(&dsb->dsb_buf, dsb->free_pos, 0);
-	}
+	/* Update the count */
+	dsb->ins[0]++;
+	intel_dsb_buffer_write(&dsb->dsb_buf, dsb->ins_start_offset + 0,
+			       dsb->ins[0]);
+
+	intel_dsb_buffer_write(&dsb->dsb_buf, dsb->free_pos++, val);
+	/* if number of data words is odd, then the last dword should be 0.*/
+	if (dsb->free_pos & 0x1)
+		intel_dsb_buffer_write(&dsb->dsb_buf, dsb->free_pos, 0);
+}
+
+void intel_dsb_reg_write(struct intel_dsb *dsb,
+			 i915_reg_t reg, u32 val)
+{
+	intel_dsb_emit(dsb, val,
+		       (DSB_OPCODE_MMIO_WRITE << DSB_OPCODE_SHIFT) |
+		       (DSB_BYTE_EN << DSB_BYTE_EN_SHIFT) |
+		       i915_mmio_reg_offset(reg));
 }
 
 static u32 intel_dsb_mask_to_byte_en(u32 mask)
@@ -370,6 +378,25 @@ void intel_dsb_nonpost_end(struct intel_dsb *dsb)
 	intel_dsb_noop(dsb, 4);
 }
 
+void intel_dsb_interrupt(struct intel_dsb *dsb)
+{
+	intel_dsb_emit(dsb, 0,
+		       DSB_OPCODE_INTERRUPT << DSB_OPCODE_SHIFT);
+}
+
+void intel_dsb_wait_usec(struct intel_dsb *dsb, int count)
+{
+	/* +1 to make sure we never wait less time than asked for */
+	intel_dsb_emit(dsb, count + 1,
+		       DSB_OPCODE_WAIT_USEC << DSB_OPCODE_SHIFT);
+}
+
+void intel_dsb_wait_vblanks(struct intel_dsb *dsb, int count)
+{
+	intel_dsb_emit(dsb, count,
+		       DSB_OPCODE_WAIT_VBLANKS << DSB_OPCODE_SHIFT);
+}
+
 static void intel_dsb_emit_wait_dsl(struct intel_dsb *dsb,
 				    u32 opcode, int lower, int upper)
 {
@@ -443,6 +470,25 @@ void intel_dsb_wait_scanline_out(struct intel_atomic_state *state,
 			   start, end);
 }
 
+void intel_dsb_poll(struct intel_dsb *dsb,
+		    i915_reg_t reg, u32 mask, u32 val,
+		    int wait_us, int count)
+{
+	struct intel_crtc *crtc = dsb->crtc;
+	enum pipe pipe = crtc->pipe;
+
+	intel_dsb_reg_write(dsb, DSB_POLLMASK(pipe, dsb->id), mask);
+	intel_dsb_reg_write(dsb, DSB_POLLFUNC(pipe, dsb->id),
+			    DSB_POLL_ENABLE |
+			    DSB_POLL_WAIT(wait_us) | DSB_POLL_COUNT(count));
+
+	intel_dsb_noop(dsb, 5);
+
+	intel_dsb_emit(dsb, val,
+		       (DSB_OPCODE_POLL << DSB_OPCODE_SHIFT) |
+		       i915_mmio_reg_offset(reg));
+}
+
 static void intel_dsb_align_tail(struct intel_dsb *dsb)
 {
 	u32 aligned_tail, tail;
@@ -510,6 +556,47 @@ static u32 dsb_error_int_en(struct intel_display *display)
 	return errors;
 }
 
+void intel_dsb_vblank_evade(struct intel_atomic_state *state,
+			    struct intel_dsb *dsb)
+{
+	struct intel_crtc *crtc = dsb->crtc;
+	const struct intel_crtc_state *crtc_state =
+		intel_pre_commit_crtc_state(state, crtc);
+	/* FIXME calibrate sensibly */
+	int latency = intel_usecs_to_scanlines(&crtc_state->hw.adjusted_mode, 20);
+	int start, end;
+
+	/*
+	 * PIPEDSL is reading as 0 when in SRDENT(PSR1) or DEEP_SLEEP(PSR2). On
+	 * wake-up scanline counting starts from vblank_start - 1. We don't know
+	 * if wake-up is already ongoing when evasion starts. In worst case
+	 * PIPEDSL could start reading valid value right after checking the
+	 * scanline. In this scenario we wouldn't have enough time to write all
+	 * registers. To tackle this evade scanline 0 as well. As a drawback we
+	 * have 1 frame delay in flip when waking up.
+	 */
+	if (crtc_state->has_psr)
+		intel_dsb_emit_wait_dsl(dsb, DSB_OPCODE_WAIT_DSL_OUT, 0, 0);
+
+	if (pre_commit_is_vrr_active(state, crtc)) {
+		int vblank_delay = intel_vrr_vblank_delay(crtc_state);
+
+		end = intel_vrr_vmin_vblank_start(crtc_state);
+		start = end - vblank_delay - latency;
+		intel_dsb_wait_scanline_out(state, dsb, start, end);
+
+		end = intel_vrr_vmax_vblank_start(crtc_state);
+		start = end - vblank_delay - latency;
+		intel_dsb_wait_scanline_out(state, dsb, start, end);
+	} else {
+		int vblank_delay = intel_mode_vblank_delay(&crtc_state->hw.adjusted_mode);
+
+		end = intel_mode_vblank_start(&crtc_state->hw.adjusted_mode);
+		start = end - vblank_delay - latency;
+		intel_dsb_wait_scanline_out(state, dsb, start, end);
+	}
+}
+
 static void _intel_dsb_chain(struct intel_atomic_state *state,
 			     struct intel_dsb *dsb,
 			     struct intel_dsb *chained_dsb,
@@ -535,7 +622,7 @@ static void _intel_dsb_chain(struct intel_atomic_state *state,
 
 	intel_dsb_reg_write(dsb, DSB_INTERRUPT(pipe, chained_dsb->id),
 			    dsb_error_int_status(display) | DSB_PROG_INT_STATUS |
-			    dsb_error_int_en(display));
+			    dsb_error_int_en(display) | DSB_PROG_INT_EN);
 
 	if (ctrl & DSB_WAIT_FOR_VBLANK) {
 		int dewake_scanline = dsb_dewake_scanline_start(state, crtc);
@@ -577,6 +664,18 @@ void intel_dsb_chain(struct intel_atomic_state *state,
 			 wait_for_vblank ? DSB_WAIT_FOR_VBLANK : 0);
 }
 
+void intel_dsb_wait_vblank_delay(struct intel_atomic_state *state,
+				 struct intel_dsb *dsb)
+{
+	struct intel_crtc *crtc = dsb->crtc;
+	const struct intel_crtc_state *crtc_state =
+		intel_pre_commit_crtc_state(state, crtc);
+	int usecs = intel_scanlines_to_usecs(&crtc_state->hw.adjusted_mode,
+					     dsb_vblank_delay(state, crtc));
+
+	intel_dsb_wait_usec(dsb, usecs);
+}
+
 static void _intel_dsb_commit(struct intel_dsb *dsb, u32 ctrl,
 			      int hw_dewake_scanline)
 {
@@ -603,7 +702,7 @@ static void _intel_dsb_commit(struct intel_dsb *dsb, u32 ctrl,
 
 	intel_de_write_fw(display, DSB_INTERRUPT(pipe, dsb->id),
 			  dsb_error_int_status(display) | DSB_PROG_INT_STATUS |
-			  dsb_error_int_en(display));
+			  dsb_error_int_en(display) | DSB_PROG_INT_EN);
 
 	intel_de_write_fw(display, DSB_HEAD(pipe, dsb->id),
 			  intel_dsb_buffer_ggtt_offset(&dsb->dsb_buf));
@@ -671,6 +770,9 @@ void intel_dsb_wait(struct intel_dsb *dsb)
 	/* Attempt to reset it */
 	dsb->free_pos = 0;
 	dsb->ins_start_offset = 0;
+	dsb->ins[0] = 0;
+	dsb->ins[1] = 0;
+
 	intel_de_write_fw(display, DSB_CTRL(pipe, dsb->id), 0);
 
 	intel_de_write_fw(display, DSB_INTERRUPT(pipe, dsb->id),
@@ -695,26 +797,22 @@ struct intel_dsb *intel_dsb_prepare(struct intel_atomic_state *state,
 				    enum intel_dsb_id dsb_id,
 				    unsigned int max_cmds)
 {
-	struct drm_i915_private *i915 = to_i915(state->base.dev);
-	intel_wakeref_t wakeref;
+	struct intel_display *display = to_intel_display(state);
+	struct ref_tracker *wakeref;
 	struct intel_dsb *dsb;
 	unsigned int size;
 
-	if (!HAS_DSB(i915))
-		return NULL;
-
-	if (!i915->display.params.enable_dsb)
+	if (!HAS_DSB(display))
 		return NULL;
 
-	/* TODO: DSB is broken in Xe KMD, so disabling it until fixed */
-	if (!IS_ENABLED(I915))
+	if (!display->params.enable_dsb)
 		return NULL;
 
 	dsb = kzalloc(sizeof(*dsb), GFP_KERNEL);
 	if (!dsb)
 		goto out;
 
-	wakeref = intel_runtime_pm_get(&i915->runtime_pm);
+	wakeref = intel_display_rpm_get(display);
 
 	/* ~1 qword per instruction, full cachelines */
 	size = ALIGN(max_cmds * 8, CACHELINE_BYTES);
@@ -722,13 +820,11 @@ struct intel_dsb *intel_dsb_prepare(struct intel_atomic_state *state,
 	if (!intel_dsb_buffer_create(crtc, &dsb->dsb_buf, size))
 		goto out_put_rpm;
 
-	intel_runtime_pm_put(&i915->runtime_pm, wakeref);
+	intel_display_rpm_put(display, wakeref);
 
 	dsb->id = dsb_id;
 	dsb->crtc = crtc;
 	dsb->size = size / 4; /* in dwords */
-	dsb->free_pos = 0;
-	dsb->ins_start_offset = 0;
 
 	dsb->chicken = dsb_chicken(state, crtc);
 	dsb->hw_dewake_scanline =
@@ -737,10 +833,10 @@ struct intel_dsb *intel_dsb_prepare(struct intel_atomic_state *state,
 	return dsb;
 
 out_put_rpm:
-	intel_runtime_pm_put(&i915->runtime_pm, wakeref);
+	intel_display_rpm_put(display, wakeref);
 	kfree(dsb);
 out:
-	drm_info_once(&i915->drm,
+	drm_info_once(display->drm,
 		      "[CRTC:%d:%s] DSB %d queue setup failed, will fallback to MMIO for display HW programming\n",
 		      crtc->base.base.id, crtc->base.name, dsb_id);
 
@@ -763,14 +859,40 @@ void intel_dsb_cleanup(struct intel_dsb *dsb)
 void intel_dsb_irq_handler(struct intel_display *display,
 			   enum pipe pipe, enum intel_dsb_id dsb_id)
 {
-	struct intel_crtc *crtc = intel_crtc_for_pipe(to_i915(display->drm), pipe);
+	struct intel_crtc *crtc = intel_crtc_for_pipe(display, pipe);
 	u32 tmp, errors;
 
 	tmp = intel_de_read_fw(display, DSB_INTERRUPT(pipe, dsb_id));
 	intel_de_write_fw(display, DSB_INTERRUPT(pipe, dsb_id), tmp);
 
+	if (tmp & DSB_PROG_INT_STATUS) {
+		spin_lock(&display->drm->event_lock);
+
+		if (crtc->dsb_event) {
+			/*
+			 * Update vblank counter/timestamp in case it
+			 * hasn't been done yet for this frame.
+			 */
+			drm_crtc_accurate_vblank_count(&crtc->base);
+
+			drm_crtc_send_vblank_event(&crtc->base, crtc->dsb_event);
+			crtc->dsb_event = NULL;
+		}
+
+		spin_unlock(&display->drm->event_lock);
+	}
+
 	errors = tmp & dsb_error_int_status(display);
-	if (errors)
-		drm_err(display->drm, "[CRTC:%d:%s] DSB %d error interrupt: 0x%x\n",
-			crtc->base.base.id, crtc->base.name, dsb_id, errors);
+	if (errors & DSB_ATS_FAULT_INT_STATUS)
+		drm_err(display->drm, "[CRTC:%d:%s] DSB %d ATS fault\n",
+			crtc->base.base.id, crtc->base.name, dsb_id);
+	if (errors & DSB_GTT_FAULT_INT_STATUS)
+		drm_err(display->drm, "[CRTC:%d:%s] DSB %d GTT fault\n",
+			crtc->base.base.id, crtc->base.name, dsb_id);
+	if (errors & DSB_RSPTIMEOUT_INT_STATUS)
+		drm_err(display->drm, "[CRTC:%d:%s] DSB %d response timeout\n",
+			crtc->base.base.id, crtc->base.name, dsb_id);
+	if (errors & DSB_POLL_ERR_INT_STATUS)
+		drm_err(display->drm, "[CRTC:%d:%s] DSB %d poll error\n",
+			crtc->base.base.id, crtc->base.name, dsb_id);
 }