[Intel-gfx] [PATCH] drm/i915: Don't clear all watermarks when updating.

[Bob Paauwe]

Clearing the watermarks for all pipes/planes when updating the
watermarks for a single CRTC change seems like the wrong thing to
do here. As is, this code will update any pipe/plane watermarks
that need updating and leave the remaining set to zero.  Later, the
watermark checks in check_wm_state() will flag these zero'd out pipe/plane
watermarks and throw errors.

By not clearing all pipe/plane watermark values, only those that
require changes are changed and the remaining stay unchanged.

Signed-off-by: Bob Paauwe <bob.j.paauwe at intel.com>
---
 drivers/gpu/drm/i915/intel_pm.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index c2f8956..25fc319 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3734,8 +3734,6 @@ static void skl_update_wm(struct drm_crtc *crtc)
 	struct skl_pipe_wm pipe_wm = {};
 	struct intel_wm_config config = {};
 
-	memset(results, 0, sizeof(*results));
-
 	skl_compute_wm_global_parameters(dev, &config);
 
 	if (!skl_update_pipe_wm(crtc, &params, &config,
-- 
2.1.0