From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
The limit++ for the 16bpp case is nonsense since the
compression limit is always supposed to be power of two.
Replace it with <<=1.
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_fbc.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index 55bc708e8712..1c220cea8977 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -239,11 +239,10 @@ static void ilk_fbc_activate(struct drm_i915_private *dev_priv)
dpfc_ctl = DPFC_CTL_PLANE(params->crtc.i9xx_plane);
if (params->fb.format->cpp[0] == 2)
- limit++;
+ limit <<= 1;
switch (limit) {
case 4:
- case 3:
dpfc_ctl |= DPFC_CTL_LIMIT_4X;
break;
case 2:
@@ -319,11 +318,10 @@ static void gen7_fbc_activate(struct drm_i915_private *dev_priv)
dpfc_ctl |= IVB_DPFC_CTL_PLANE(params->crtc.i9xx_plane);
if (params->fb.format->cpp[0] == 2)
- limit++;
+ limit <<= 1;
switch (limit) {
case 4:
- case 3:
dpfc_ctl |= DPFC_CTL_LIMIT_4X;
break;
case 2:
--
2.31.1
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