From: Ville Syrjälä <[email protected]>

Fix the incorrect enabled pipes mask for pipe C in the WM calculations.

Additionally, in an effort to make the code easier to understand,
populate the mask with 1 << PIPE_[ABC] instead of raw numbers.

v2: Use 1 << PIPE_[ABC] (ickle/danvet)

Signed-off-by: Ville Syrjälä <[email protected]>
---
 drivers/gpu/drm/i915/intel_pm.c | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 8a3d89e..0bff282 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -1305,13 +1305,13 @@ static void valleyview_update_wm(struct drm_device *dev)
                            &valleyview_wm_info, latency_ns,
                            &valleyview_cursor_wm_info, latency_ns,
                            &planea_wm, &cursora_wm))
-               enabled |= 1;
+               enabled |= 1 << PIPE_A;
 
        if (g4x_compute_wm0(dev, 1,
                            &valleyview_wm_info, latency_ns,
                            &valleyview_cursor_wm_info, latency_ns,
                            &planeb_wm, &cursorb_wm))
-               enabled |= 2;
+               enabled |= 1 << PIPE_B;
 
        if (single_plane_enabled(enabled) &&
            g4x_compute_srwm(dev, ffs(enabled) - 1,
@@ -1361,13 +1361,13 @@ static void g4x_update_wm(struct drm_device *dev)
                            &g4x_wm_info, latency_ns,
                            &g4x_cursor_wm_info, latency_ns,
                            &planea_wm, &cursora_wm))
-               enabled |= 1;
+               enabled |= 1 << PIPE_A;
 
        if (g4x_compute_wm0(dev, 1,
                            &g4x_wm_info, latency_ns,
                            &g4x_cursor_wm_info, latency_ns,
                            &planeb_wm, &cursorb_wm))
-               enabled |= 2;
+               enabled |= 1 << PIPE_B;
 
        if (single_plane_enabled(enabled) &&
            g4x_compute_srwm(dev, ffs(enabled) - 1,
@@ -1727,7 +1727,7 @@ static void ironlake_update_wm(struct drm_device *dev)
                DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
                              " plane %d, " "cursor: %d\n",
                              plane_wm, cursor_wm);
-               enabled |= 1;
+               enabled |= 1 << PIPE_A;
        }
 
        if (g4x_compute_wm0(dev, 1,
@@ -1741,7 +1741,7 @@ static void ironlake_update_wm(struct drm_device *dev)
                DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
                              " plane %d, cursor: %d\n",
                              plane_wm, cursor_wm);
-               enabled |= 2;
+               enabled |= 1 << PIPE_B;
        }
 
        /*
@@ -1812,7 +1812,7 @@ static void sandybridge_update_wm(struct drm_device *dev)
                DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
                              " plane %d, " "cursor: %d\n",
                              plane_wm, cursor_wm);
-               enabled |= 1;
+               enabled |= 1 << PIPE_A;
        }
 
        if (g4x_compute_wm0(dev, 1,
@@ -1826,7 +1826,7 @@ static void sandybridge_update_wm(struct drm_device *dev)
                DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
                              " plane %d, cursor: %d\n",
                              plane_wm, cursor_wm);
-               enabled |= 2;
+               enabled |= 1 << PIPE_B;
        }
 
        /*
@@ -1915,7 +1915,7 @@ static void ivybridge_update_wm(struct drm_device *dev)
                DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
                              " plane %d, " "cursor: %d\n",
                              plane_wm, cursor_wm);
-               enabled |= 1;
+               enabled |= 1 << PIPE_A;
        }
 
        if (g4x_compute_wm0(dev, 1,
@@ -1929,7 +1929,7 @@ static void ivybridge_update_wm(struct drm_device *dev)
                DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
                              " plane %d, cursor: %d\n",
                              plane_wm, cursor_wm);
-               enabled |= 2;
+               enabled |= 1 << PIPE_B;
        }
 
        if (g4x_compute_wm0(dev, 2,
@@ -1943,7 +1943,7 @@ static void ivybridge_update_wm(struct drm_device *dev)
                DRM_DEBUG_KMS("FIFO watermarks For pipe C -"
                              " plane %d, cursor: %d\n",
                              plane_wm, cursor_wm);
-               enabled |= 3;
+               enabled |= 1 << PIPE_C;
        }
 
        /*
-- 
1.8.1.5

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