patches.baytrail/0126-drm-i915-add-power-well-and-cpu-transcoder-info-to-t.patch

From 1502d4c0ce6baa9003fa855f3bdec24591d4b919 Mon Sep 17 00:00:00 2001
From: Paulo Zanoni <paulo.r.zanoni@intel.com>
Date: Fri, 3 May 2013 12:15:37 -0300
Subject: drm/i915: add power well and cpu transcoder info to the error state

We need to dump these registers if we want to properly interpret the
others.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit ff57f1b095e7c3ad0720193cd341d8ac1c781156)
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c |   13 +++++++++++++
 1 file changed, 13 insertions(+)

--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9816,6 +9816,9 @@ int intel_modeset_vga_set_state(struct d
 #include <linux/seq_file.h>
 
 struct intel_display_error_state {
+
+	u32 power_well_driver;
+
 	struct intel_cursor_error_state {
 		u32 control;
 		u32 position;
@@ -9824,6 +9827,7 @@ struct intel_display_error_state {
 	} cursor[I915_MAX_PIPES];
 
 	struct intel_pipe_error_state {
+		enum transcoder cpu_transcoder;
 		u32 conf;
 		u32 source;
 
@@ -9858,8 +9862,12 @@ intel_display_capture_error_state(struct
 	if (error == NULL)
 		return NULL;
 
+	if (HAS_POWER_WELL(dev))
+		error->power_well_driver = I915_READ(HSW_PWR_WELL_DRIVER);
+
 	for_each_pipe(i) {
 		cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv, i);
+		error->pipe[i].cpu_transcoder = cpu_transcoder;
 
 		if (INTEL_INFO(dev)->gen <= 6 || IS_VALLEYVIEW(dev)) {
 			error->cursor[i].control = I915_READ(CURCNTR(i));
@@ -9905,8 +9913,13 @@ intel_display_print_error_state(struct s
 	int i;
 
 	seq_printf(m, "Num Pipes: %d\n", INTEL_INFO(dev)->num_pipes);
+	if (HAS_POWER_WELL(dev))
+		seq_printf(m, "PWR_WELL_CTL2: %08x\n",
+			   error->power_well_driver);
 	for_each_pipe(i) {
 		seq_printf(m, "Pipe [%d]:\n", i);
+		seq_printf(m, "  CPU transcoder: %c\n",
+			   transcoder_name(error->pipe[i].cpu_transcoder));
 		seq_printf(m, "  CONF: %08x\n", error->pipe[i].conf);
 		seq_printf(m, "  SRC: %08x\n", error->pipe[i].source);
 		seq_printf(m, "  HTOTAL: %08x\n", error->pipe[i].htotal);