Disabling ILK+ watermarks on failure to read the watermark levels dates
back to 2010 and commit 7f8a85698f5c ("drm/i915: Add the support of
memory self-refresh on Ironlake"), with no explanations, and it's been
copied and modified from that ever since. Finally drop it.
If the value are actually zero, the ilk_compute_*_wm() functions should
handle it gracefully.
Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Suggested-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/i9xx_wm.c | 14 +-------------
1 file changed, 1 insertion(+), 13 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/i9xx_wm.c b/drivers/gpu/drm/i915/display/i9xx_wm.c
index 50cdfe11192e..3d4687efe4dd 100644
--- a/drivers/gpu/drm/i915/display/i9xx_wm.c
+++ b/drivers/gpu/drm/i915/display/i9xx_wm.c
@@ -4007,19 +4007,7 @@ void i9xx_wm_init(struct drm_i915_private *dev_priv)
/* For FIFO watermark updates */
if (HAS_PCH_SPLIT(dev_priv)) {
ilk_setup_wm_latency(dev_priv);
-
- if ((DISPLAY_VER(dev_priv) == 5 && dev_priv->display.wm.pri_latency[1] &&
- dev_priv->display.wm.spr_latency[1] && dev_priv->display.wm.cur_latency[1]) ||
- (DISPLAY_VER(dev_priv) != 5 && dev_priv->display.wm.pri_latency[0] &&
- dev_priv->display.wm.spr_latency[0] && dev_priv->display.wm.cur_latency[0])) {
- dev_priv->display.funcs.wm = &ilk_wm_funcs;
- } else {
- ilk_init_lp_watermarks(dev_priv);
- drm_dbg_kms(&dev_priv->drm,
- "Failed to read display plane latency. "
- "Disable CxSR\n");
- dev_priv->display.funcs.wm = &nop_funcs;
- }
+ dev_priv->display.funcs.wm = &ilk_wm_funcs;
} else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
vlv_setup_wm_latency(dev_priv);
dev_priv->display.funcs.wm = &vlv_wm_funcs;
--
2.34.1
