[v3 2/2] drm/i915/display/debug: Expose Dither status via debugfs

[Bhanuprakash Modem]

It's useful to know the dithering state & pipe bpc for IGT testing.
This patch will expose the dithering state for the crtc via a debugfs
file "dither".

Example usage: cat /sys/kernel/debug/dri/0/crtc-0/dither

Cc: Uma Shankar <uma.shankar at intel.com>
Cc: Nischal Varide <nischal.varide at intel.com>
Cc: Matt Roper <matthew.d.roper at intel.com>
Signed-off-by: Bhanuprakash Modem <bhanuprakash.modem at intel.com>
---
 drivers/gpu/drm/i915/display/intel_display_debugfs.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
index 88bb05d5c483..1acfcf8b6fe4 100644
--- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
+++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
@@ -1019,8 +1019,9 @@ static void intel_crtc_info(struct seq_file *m, struct intel_crtc *crtc)
 			   yesno(crtc_state->hw.active),
 			   DRM_MODE_ARG(&crtc_state->hw.adjusted_mode));
 
-		seq_printf(m, "\tpipe src size=%dx%d, dither=%s, bpp=%d\n",
+		seq_printf(m, "\tpipe src size=%dx%d, dither_cc1=%s, dither=%s, bpp=%d\n",
 			   crtc_state->pipe_src_w, crtc_state->pipe_src_h,
+			   yesno(crtc_state->gamma_mode & POST_CC1_DITHER_ENABLE),
 			   yesno(crtc_state->dither), crtc_state->pipe_bpp);
 
 		intel_scaler_info(m, crtc);
-- 
2.20.1