[Intel-gfx] [PATCH] drm/i915: fix not reading DSC disable fuse in GLK

[Lucas De Marchi]

We were using GRAPHICS_VER() to handle SKL_DFSM register, which means we
were not handling GLK correctly since that has GRAPHICS_VER == 9, but
DISPLAY_VER == 10. Switch the entire branch to check DISPLAY_VER
which makes it more in line with Bspec.

Even though the Bspec has an exception for RKL in
TGL_DFSM_PIPE_D_DISABLE, we don't have to do anything as the bit has
disable semantic and RKL doesn't have pipe D.

Bspec: 50075, 7548
Fixes: 2b5a4562edd0 ("drm/i915/display: Simplify GLK display version tests")
Cc: Matt Roper <matthew.d.roper at intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
---
 drivers/gpu/drm/i915/intel_device_info.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_device_info.c b/drivers/gpu/drm/i915/intel_device_info.c
index d5cf5977938a..99b51c292942 100644
--- a/drivers/gpu/drm/i915/intel_device_info.c
+++ b/drivers/gpu/drm/i915/intel_device_info.c
@@ -335,7 +335,7 @@ void intel_device_info_runtime_init(struct drm_i915_private *dev_priv)
 			info->pipe_mask &= ~BIT(PIPE_C);
 			info->cpu_transcoder_mask &= ~BIT(TRANSCODER_C);
 		}
-	} else if (HAS_DISPLAY(dev_priv) && GRAPHICS_VER(dev_priv) >= 9) {
+	} else if (HAS_DISPLAY(dev_priv) && DISPLAY_VER(dev_priv) >= 9) {
 		u32 dfsm = intel_de_read(dev_priv, SKL_DFSM);
 
 		if (dfsm & SKL_DFSM_PIPE_A_DISABLE) {
@@ -350,7 +350,8 @@ void intel_device_info_runtime_init(struct drm_i915_private *dev_priv)
 			info->pipe_mask &= ~BIT(PIPE_C);
 			info->cpu_transcoder_mask &= ~BIT(TRANSCODER_C);
 		}
-		if (GRAPHICS_VER(dev_priv) >= 12 &&
+
+		if (DISPLAY_VER(dev_priv) >= 12 &&
 		    (dfsm & TGL_DFSM_PIPE_D_DISABLE)) {
 			info->pipe_mask &= ~BIT(PIPE_D);
 			info->cpu_transcoder_mask &= ~BIT(TRANSCODER_D);
@@ -362,10 +363,10 @@ void intel_device_info_runtime_init(struct drm_i915_private *dev_priv)
 		if (dfsm & SKL_DFSM_DISPLAY_PM_DISABLE)
 			info->display.has_fbc = 0;
 
-		if (GRAPHICS_VER(dev_priv) >= 11 && (dfsm & ICL_DFSM_DMC_DISABLE))
+		if (DISPLAY_VER(dev_priv) >= 11 && (dfsm & ICL_DFSM_DMC_DISABLE))
 			info->display.has_dmc = 0;
 
-		if (GRAPHICS_VER(dev_priv) >= 10 &&
+		if (DISPLAY_VER(dev_priv) >= 10 &&
 		    (dfsm & CNL_DFSM_DISPLAY_DSC_DISABLE))
 			info->display.has_dsc = 0;
 	}
-- 
2.31.1