drm/i915: Hook in display GTT faults for IVB/HSW

Dump out the display fault information from the IVB/HSW
error interrupt handler.

Bspec: 8203
Reviewed-by: Vinod Govindapillai <vinod.govindapillai@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250217070047.953-5-ville.syrjala@linux.intel.com

Author: vsyrjala

drivers/gpu/drm/i915/display/intel_display_irq.c

@@ -720,6 +720,39 @@ static void ibx_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
 		intel_pch_fifo_underrun_irq_handler(display, PIPE_B);
 }
 
+static u32 ivb_err_int_pipe_fault_mask(enum pipe pipe)
+{
+	switch (pipe) {
+	case PIPE_A:
+		return ERR_INT_SPRITE_A_FAULT |
+			ERR_INT_PRIMARY_A_FAULT |
+			ERR_INT_CURSOR_A_FAULT;
+	case PIPE_B:
+		return ERR_INT_SPRITE_B_FAULT |
+			ERR_INT_PRIMARY_B_FAULT |
+			ERR_INT_CURSOR_B_FAULT;
+	case PIPE_C:
+		return ERR_INT_SPRITE_C_FAULT |
+			ERR_INT_PRIMARY_C_FAULT |
+			ERR_INT_CURSOR_C_FAULT;
+	default:
+		return 0;
+	}
+}
+
+static const struct pipe_fault_handler ivb_pipe_fault_handlers[] = {
+	{ .fault = ERR_INT_SPRITE_A_FAULT, .handle = handle_plane_fault, .plane_id = PLANE_SPRITE0, },
+	{ .fault = ERR_INT_PRIMARY_A_FAULT, .handle = handle_plane_fault, .plane_id = PLANE_PRIMARY, },
+	{ .fault = ERR_INT_CURSOR_A_FAULT, .handle = handle_plane_fault, .plane_id = PLANE_CURSOR, },
+	{ .fault = ERR_INT_SPRITE_B_FAULT, .handle = handle_plane_fault, .plane_id = PLANE_SPRITE0, },
+	{ .fault = ERR_INT_PRIMARY_B_FAULT, .handle = handle_plane_fault, .plane_id = PLANE_PRIMARY, },
+	{ .fault = ERR_INT_CURSOR_B_FAULT, .handle = handle_plane_fault, .plane_id = PLANE_CURSOR, },
+	{ .fault = ERR_INT_SPRITE_C_FAULT, .handle = handle_plane_fault, .plane_id = PLANE_SPRITE0, },
+	{ .fault = ERR_INT_PRIMARY_C_FAULT, .handle = handle_plane_fault, .plane_id = PLANE_PRIMARY, },
+	{ .fault = ERR_INT_CURSOR_C_FAULT, .handle = handle_plane_fault, .plane_id = PLANE_CURSOR, },
+	{}
+};
+
 static void ivb_err_int_handler(struct drm_i915_private *dev_priv)
 {
 	struct intel_display *display = &dev_priv->display;
@@ -729,7 +762,15 @@ static void ivb_err_int_handler(struct drm_i915_private *dev_priv)
 	if (err_int & ERR_INT_POISON)
 		drm_err(&dev_priv->drm, "Poison interrupt\n");
 
+	if (err_int & ERR_INT_INVALID_GTT_PTE)
+		drm_err_ratelimited(display->drm, "Invalid GTT PTE\n");
+
+	if (err_int & ERR_INT_INVALID_PTE_DATA)
+		drm_err_ratelimited(display->drm, "Invalid PTE data\n");
+
 	for_each_pipe(dev_priv, pipe) {
+		u32 fault_errors;
+
 		if (err_int & ERR_INT_FIFO_UNDERRUN(pipe))
 			intel_cpu_fifo_underrun_irq_handler(display, pipe);
 
@@ -739,6 +780,11 @@ static void ivb_err_int_handler(struct drm_i915_private *dev_priv)
 			else
 				hsw_pipe_crc_irq_handler(dev_priv, pipe);
 		}
+
+		fault_errors = err_int & ivb_err_int_pipe_fault_mask(pipe);
+		if (fault_errors)
+			intel_pipe_fault_irq_handler(display, ivb_pipe_fault_handlers,
+						     pipe, fault_errors);
 	}
 
 	intel_de_write(display, GEN7_ERR_INT, err_int);

drivers/gpu/drm/i915/i915_reg.h

@@ -374,6 +374,17 @@
 
 #define GEN7_ERR_INT	_MMIO(0x44040)
 #define   ERR_INT_POISON		(1 << 31)
+#define   ERR_INT_INVALID_GTT_PTE	(1 << 29)
+#define   ERR_INT_INVALID_PTE_DATA	(1 << 28)
+#define   ERR_INT_SPRITE_C_FAULT	(1 << 23)
+#define   ERR_INT_PRIMARY_C_FAULT	(1 << 22)
+#define   ERR_INT_CURSOR_C_FAULT	(1 << 21)
+#define   ERR_INT_SPRITE_B_FAULT	(1 << 20)
+#define   ERR_INT_PRIMARY_B_FAULT	(1 << 19)
+#define   ERR_INT_CURSOR_B_FAULT	(1 << 18)
+#define   ERR_INT_SPRITE_A_FAULT	(1 << 17)
+#define   ERR_INT_PRIMARY_A_FAULT	(1 << 16)
+#define   ERR_INT_CURSOR_A_FAULT	(1 << 15)
 #define   ERR_INT_MMIO_UNCLAIMED	(1 << 13)
 #define   ERR_INT_PIPE_CRC_DONE_C	(1 << 8)
 #define   ERR_INT_FIFO_UNDERRUN_C	(1 << 6)