[PATCH 2/2] drm/i915: Fix DEIER and GTIER collecting for BDW.

[Rodrigo Vivi <rodrigo.vivi@intel.com>]

BDW has many other Display Engine interrupts and GT interrupts registers.
Collecting it properly on gpu_error_state.

On debugfs all was properly listed already but besides we were also listing old
DEIER and GTIER that doesn't exist on BDW anymore. This was causing
unclaimed register messages:

https://bugs.freedesktop.org/show_bug.cgi?id=81701

Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c   |  2 +-
 drivers/gpu/drm/i915/i915_drv.h       |  4 +++-
 drivers/gpu/drm/i915/i915_gpu_error.c | 23 ++++++++++++++++++++---
 3 files changed, 24 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 9e737b7..679cda6 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -783,7 +783,7 @@ static int i915_interrupt_info(struct seq_file *m, void *data)
 			seq_printf(m, "Pipe %c stat:         %08x\n",
 				   pipe_name(pipe),
 				   I915_READ(PIPESTAT(pipe)));
-	} else {
+	} else if (!IS_BROADWELL(dev)) {
 		seq_printf(m, "North Display Interrupt enable:		%08x\n",
 			   I915_READ(DEIER));
 		seq_printf(m, "North Display Interrupt identity:	%08x\n",
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index ccb97f1..ee28cd7 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -314,7 +314,9 @@ struct drm_i915_error_state {
 	u32 eir;
 	u32 pgtbl_er;
 	u32 ier;
-	u32 gtier;
+	u32 gtier[4];
+	u32 deier[3];
+	u32 de_misc_ier;
 	u32 ccid;
 	u32 derrmr;
 	u32 forcewake;
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 372fea3..f865d1d 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -358,9 +358,19 @@ int i915_error_state_to_str(struct drm_i915_error_state_buf *m,
 	err_printf(m, "Suspend count: %u\n", error->suspend_count);
 	err_printf(m, "PCI ID: 0x%04x\n", dev->pdev->device);
 	err_printf(m, "EIR: 0x%08x\n", error->eir);
-	err_printf(m, "IER: 0x%08x\n", error->ier);
+	if (IS_BROADWELL(dev)) {
+		for_each_pipe(i)
+			err_printf(m, "DEIER pipe %c: 0x%08x\n", pipe_name(i),
+				   error->deier[i]);
+		for (i = 0; i < 4; i++)
+			err_printf(m, "GTIER gt %d: 0x%08x\n", i,
+				   error->gtier[i]);
+		err_printf(m, "DE_MISC_IER: 0x%08x\n", error->de_misc_ier);
+	} else {
+		err_printf(m, "IER: 0x%08x\n", error->ier);
+	}
 	if (IS_HASWELL(dev))
-		err_printf(m, "GTIER: 0x%08x\n", error->gtier);
+		err_printf(m, "GTIER: 0x%08x\n", error->gtier[0]);
 	err_printf(m, "PGTBL_ER: 0x%08x\n", error->pgtbl_er);
 	err_printf(m, "FORCEWAKE: 0x%08x\n", error->forcewake);
 	err_printf(m, "DERRMR: 0x%08x\n", error->derrmr);
@@ -1093,6 +1103,7 @@ static void i915_capture_reg_state(struct drm_i915_private *dev_priv,
 				   struct drm_i915_error_state *error)
 {
 	struct drm_device *dev = dev_priv->dev;
+	int i;
 
 	/* General organization
 	 * 1. Registers specific to a single generation
@@ -1139,7 +1150,13 @@ static void i915_capture_reg_state(struct drm_i915_private *dev_priv,
 
 	if (IS_HASWELL(dev)) {
 		error->ier = I915_READ(DEIER);
-		error->gtier = I915_READ(GTIER);
+		error->gtier[0] = I915_READ(GTIER);
+	} else if (IS_BROADWELL(dev)) {
+		for_each_pipe(i)
+			error->deier[i] = I915_READ(GEN8_DE_PIPE_IER(i));
+		for (i = 0; i < 4; i++)
+			error->gtier[3] = I915_READ(GEN8_GT_IER(i));
+		error->de_misc_ier = I915_READ(GEN8_DE_MISC_IER);
 	} else if (HAS_PCH_SPLIT(dev)) {
 		error->ier = I915_READ(DEIER) | I915_READ(GTIER);
 	} else if (IS_GEN2(dev)) {
-- 
1.9.3