patches.baytrail/0208-drm-i915-add-basic-pipe-config-dump-support.patch

From c93c0760b4b29502316c5e76138699cdb6e5644e Mon Sep 17 00:00:00 2001
From: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Tue, 28 May 2013 12:05:54 +0200
Subject: drm/i915: add basic pipe config dump support

All this pipe config abstraction adds another layer of complexity, so
it's good to have better visibility into what's going on exactly.
Doesn't dump out everything yet, and some bits are a bit duplicated
but this should be a good start.

Note that at boot-up a lot of the fields are 0 even for enabled pipes,
this is simply because our hw state readout code doesn't support
everything.

v2: Remove a few more now redudant debug output lines.

v3: Review from Paulo
- use transcoder_name
- fix up format specifiers
- add missing ':' in debug output

Cc: Paulo Zanoni <przanoni@gmail.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit c0b0341121f2e2b329e60986aee766e4d1d80fde)
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c |   74 ++++++++++++++++++++---------------
 1 file changed, 44 insertions(+), 30 deletions(-)

--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3523,18 +3523,12 @@ static void i9xx_pfit_enable(struct inte
 	if (!crtc->config.gmch_pfit.control)
 		return;
 
-	WARN_ON(I915_READ(PFIT_CONTROL) & PFIT_ENABLE);
-	assert_pipe_disabled(dev_priv, crtc->pipe);
-
 	/*
-	 * Enable automatic panel scaling so that non-native modes
-	 * fill the screen.  The panel fitter should only be
-	 * adjusted whilst the pipe is disabled, according to
-	 * register description and PRM.
+	 * The panel fitter should only be adjusted whilst the pipe is disabled,
+	 * according to register description and PRM.
 	 */
-	DRM_DEBUG_KMS("applying panel-fitter: %x, %x\n",
-		      pipe_config->gmch_pfit.control,
-		      pipe_config->gmch_pfit.pgm_ratios);
+	WARN_ON(I915_READ(PFIT_CONTROL) & PFIT_ENABLE);
+	assert_pipe_disabled(dev_priv, crtc->pipe);
 
 	I915_WRITE(PFIT_PGM_RATIOS, pipe_config->gmch_pfit.pgm_ratios);
 	I915_WRITE(PFIT_CONTROL, pipe_config->gmch_pfit.control);
@@ -4857,9 +4851,6 @@ static int i9xx_crtc_mode_set(struct drm
 			dspcntr |= DISPPLANE_SEL_PIPE_B;
 	}
 
-	DRM_DEBUG_KMS("Mode for pipe %c:\n", pipe_name(pipe));
-	drm_mode_debug_printmodeline(mode);
-
 	intel_set_pipe_timings(intel_crtc, mode, adjusted_mode);
 
 	/* pipesrc and dspsize control the size that is scaled from,
@@ -5661,9 +5652,6 @@ static int ironlake_crtc_mode_set(struct
 	/* Ensure that the cursor is valid for the new mode before changing... */
 	intel_crtc_update_cursor(crtc, true);
 
-	DRM_DEBUG_KMS("Mode for pipe %c:\n", pipe_name(pipe));
-	drm_mode_debug_printmodeline(mode);
-
 	/* CPU eDP is the only output that doesn't need a PCH PLL of its own. */
 	if (intel_crtc->config.has_pch_encoder) {
 		struct intel_pch_pll *pll;
@@ -5874,9 +5862,6 @@ static int haswell_crtc_mode_set(struct
 	/* Ensure that the cursor is valid for the new mode before changing... */
 	intel_crtc_update_cursor(crtc, true);
 
-	DRM_DEBUG_KMS("Mode for pipe %c:\n", pipe_name(pipe));
-	drm_mode_debug_printmodeline(mode);
-
 	if (intel_crtc->config.has_dp_encoder)
 		intel_dp_set_m_n(intel_crtc);
 
@@ -7689,6 +7674,35 @@ pipe_config_set_bpp(struct drm_crtc *crt
 	return bpp;
 }
 
+static void intel_dump_pipe_config(struct intel_crtc *crtc,
+				   struct intel_crtc_config *pipe_config,
+				   const char *context)
+{
+	DRM_DEBUG_KMS("[CRTC:%d]%s config for pipe %c\n", crtc->base.base.id,
+		      context, pipe_name(crtc->pipe));
+
+	DRM_DEBUG_KMS("cpu_transcoder: %c\n", transcoder_name(pipe_config->cpu_transcoder));
+	DRM_DEBUG_KMS("pipe bpp: %i, dithering: %i\n",
+		      pipe_config->pipe_bpp, pipe_config->dither);
+	DRM_DEBUG_KMS("fdi/pch: %i, lanes: %i, gmch_m: %u, gmch_n: %u, link_m: %u, link_n: %u, tu: %u\n",
+		      pipe_config->has_pch_encoder,
+		      pipe_config->fdi_lanes,
+		      pipe_config->fdi_m_n.gmch_m, pipe_config->fdi_m_n.gmch_n,
+		      pipe_config->fdi_m_n.link_m, pipe_config->fdi_m_n.link_n,
+		      pipe_config->fdi_m_n.tu);
+	DRM_DEBUG_KMS("requested mode:\n");
+	drm_mode_debug_printmodeline(&pipe_config->requested_mode);
+	DRM_DEBUG_KMS("adjusted mode:\n");
+	drm_mode_debug_printmodeline(&pipe_config->adjusted_mode);
+	DRM_DEBUG_KMS("gmch pfit: control: 0x%08x, ratios: 0x%08x, lvds border: 0x%08x\n",
+		      pipe_config->gmch_pfit.control,
+		      pipe_config->gmch_pfit.pgm_ratios,
+		      pipe_config->gmch_pfit.lvds_border_bits);
+	DRM_DEBUG_KMS("pch pfit: pos: 0x%08x, size: 0x%08x\n",
+		      pipe_config->pch_pfit.pos,
+		      pipe_config->pch_pfit.size);
+}
+
 static struct intel_crtc_config *
 intel_modeset_pipe_config(struct drm_crtc *crtc,
 			  struct drm_framebuffer *fb,
@@ -7759,8 +7773,6 @@ encoder_retry:
 		goto encoder_retry;
 	}
 
-	DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
-
 	pipe_config->dither = pipe_config->pipe_bpp != plane_bpp;
 	DRM_DEBUG_KMS("plane bpp: %i, pipe bpp: %i, dithering: %i\n",
 		      plane_bpp, pipe_config->pipe_bpp, pipe_config->dither);
@@ -8122,9 +8134,14 @@ intel_modeset_check_state(struct drm_dev
 		     "crtc active state doesn't match with hw state "
 		     "(expected %i, found %i)\n", crtc->active, active);
 
-		WARN(active &&
-		     !intel_pipe_config_compare(dev, &crtc->config, &pipe_config),
-		     "pipe state doesn't match!\n");
+		if (active &&
+		    !intel_pipe_config_compare(dev, &crtc->config, &pipe_config)) {
+			WARN(1, "pipe state doesn't match!\n");
+			intel_dump_pipe_config(crtc, &pipe_config,
+					       "[hw state]");
+			intel_dump_pipe_config(crtc, &crtc->config,
+					       "[sw state]");
+		}
 	}
 }
 
@@ -8164,6 +8181,8 @@ static int __intel_set_mode(struct drm_c
 
 			goto out;
 		}
+		intel_dump_pipe_config(to_intel_crtc(crtc), pipe_config,
+				       "[modeset]");
 	}
 
 	for_each_intel_crtc_masked(dev, disable_pipes, intel_crtc)
@@ -8523,12 +8542,6 @@ static int intel_crtc_set_config(struct
 		goto fail;
 
 	if (config->mode_changed) {
-		if (set->mode) {
-			DRM_DEBUG_KMS("attempting to set mode from"
-					" userspace\n");
-			drm_mode_debug_printmodeline(set->mode);
-		}
-
 		ret = intel_set_mode(set->crtc, set->mode,
 				     set->x, set->y, set->fb);
 	} else if (config->fb_changed) {
@@ -9565,6 +9578,7 @@ void intel_modeset_setup_hw_state(struct
 	for_each_pipe(pipe) {
 		crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
 		intel_sanitize_crtc(crtc);
+		intel_dump_pipe_config(crtc, &crtc->config, "[setup_hw_state]");
 	}
 
 	if (force_restore) {