drm/i915: Fix bad comparison in skl_compute_plane_wm.

ddb_allocation && ddb_allocation / blocks_per_line >= 1 is the same
as ddb_allocation >= blocks_per_line, so use the latter to simplify
this.

This fixes the following compiler warning:

drivers/gpu/drm/i915/intel_pm.c:4467]: (warning) Comparison of a
boolean expression with an integer other than 0 or 1.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Fixes: d555cb5827d6 ("drm/i915/skl+: use linetime latency if ddb size is not available")
Cc: "Mahesh Kumar" <mahesh1.kumar@intel.com>
Reported-by: David Binderman <dcb314@hotmail.com>
Cc: David Binderman <dcb314@hotmail.com>
Cc: <drm-intel-fixes@lists.freedesktop.org> # v4.13-rc1+
Reviewed-by: Mahesh Kumar <mahesh1.kumar@intel.com>
(cherry picked from commit 54d20ed1fff23c7d2633f01fc788111bf9c51c5d)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170717111355.4523-1-maarten.lankhorst@linux.intel.com
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 48ea0fca1f7239eb502b8269d57b95520ddb5708..40b224b44d1bec1bd08e970be65fe775f3a4c12e 100644 (file)
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4463,8 +4463,8 @@ static int skl_compute_plane_wm(const struct drm_i915_private *dev_priv,
                if ((cpp * cstate->base.adjusted_mode.crtc_htotal / 512 < 1) &&
                    (plane_bytes_per_line / 512 < 1))
                        selected_result = method2;
-               else if ((ddb_allocation && ddb_allocation /
-                       fixed_16_16_to_u32_round_up(plane_blocks_per_line)) >= 1)
+               else if (ddb_allocation >=
+                        fixed_16_16_to_u32_round_up(plane_blocks_per_line))
                        selected_result = min_fixed_16_16(method1, method2);
                else if (latency >= linetime_us)
                        selected_result = min_fixed_16_16(method1, method2);