drm/i915: calculate watermarks for devices that have 3 pipes

This adds proper support for calculating those watermarks, checking for
number of available pipes instead of specific GPU variants when deciding
if watermarks for 3rd pipe are necessary.

Reviewed-by: Jesse Barnes <[email protected]>
Signed-off-by: Eugeni Dodonov <[email protected]>
Signed-off-by: Daniel Vetter <[email protected]>

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 43892341079acfdf1e8e38e92655a456205fd397..21587f89f44bf8981b3556026ab8261b40de1230 100644 (file)
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -1803,8 +1803,7 @@ static void sandybridge_update_wm(struct drm_device *dev)
                enabled |= 2;
        }
 
-       /* IVB has 3 pipes */
-       if (IS_IVYBRIDGE(dev) &&
+       if ((dev_priv->num_pipe == 3) &&
            g4x_compute_wm0(dev, 2,
                            &sandybridge_display_wm_info, latency,
                            &sandybridge_cursor_wm_info, latency,