From: Ville Syrjälä <ville.syrj...@linux.intel.com>
IVB introduced the CUR_FBC_CTL register which allows reducing the cursor
height down to 8 lines from the otherwise square cursor dimensions.
Implement support for it.
Commandeer the otherwise unused intel_crtc->cursor_size to track the
current value of CUR_FBC_CTL so that we can avoid duplicating the
complicated device type checks in i9xx_update_cursor().
One caveat to note is that CUR_FBC_CTL can't be used with 180 degree
rotation, so when cursor rotation gets introduced some extra checks are
needed.
Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
---
drivers/gpu/drm/i915/i915_reg.h | 5 ++++-
drivers/gpu/drm/i915/intel_display.c | 25 ++++++++++++++++++++++++-
2 files changed, 28 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 15c0eaa..572001b 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4169,7 +4169,9 @@ enum punit_power_well {
#define CURSOR_POS_SIGN 0x8000
#define CURSOR_X_SHIFT 0
#define CURSOR_Y_SHIFT 16
-#define CURSIZE 0x700a0
+#define CURSIZE 0x700a0 /* 845/865 */
+#define _CUR_FBC_CTL_A 0x700a0 /* ivb+ */
+#define CUR_FBC_CTL_EN (1 << 31)
#define _CURBCNTR 0x700c0
#define _CURBBASE 0x700c4
#define _CURBPOS 0x700c8
@@ -4185,6 +4187,7 @@ enum punit_power_well {
#define CURCNTR(pipe) _CURSOR2(pipe, _CURACNTR)
#define CURBASE(pipe) _CURSOR2(pipe, _CURABASE)
#define CURPOS(pipe) _CURSOR2(pipe, _CURAPOS)
+#define CUR_FBC_CTL(pipe) _CURSOR2(pipe, _CUR_FBC_CTL_A)
#define CURSOR_A_OFFSET 0x70080
#define CURSOR_B_OFFSET 0x700c0
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index ca729e5..9c000fb 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -8197,6 +8197,7 @@ static void i9xx_update_cursor(struct drm_crtc *crtc, u32
base)
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
int pipe = intel_crtc->pipe;
uint32_t cntl;
+ uint32_t fbc_ctl = 0;
cntl = 0;
if (base) {
@@ -8217,6 +8218,16 @@ static void i9xx_update_cursor(struct drm_crtc *crtc,
u32 base)
}
cntl |= pipe << 28; /* Connect to correct pipe */
}
+
+ if (intel_crtc->cursor_height != intel_crtc->cursor_width)
+ fbc_ctl = CUR_FBC_CTL_EN | (intel_crtc->cursor_height - 1);
+
+ if (intel_crtc->cursor_size != fbc_ctl) {
+ I915_WRITE(CUR_FBC_CTL(pipe), fbc_ctl);
+ intel_crtc->cursor_size = fbc_ctl;
+ intel_crtc->cursor_cntl = 0;
+ }
+
if (IS_HASWELL(dev) || IS_BROADWELL(dev))
cntl |= CURSOR_PIPE_CSC_ENABLE;
@@ -8293,6 +8304,8 @@ static bool cursor_size_ok(struct drm_device *dev,
* the width of their cursors, the height is arbitrary up to
* the precision of the register. Everything else requires
* square cursors, limited to a few power-of-two sizes.
+ * ivb+ have CUR_FBC_CTL which allows reducing the cursor
+ * height down to a minimum of 8 lines.
*/
if (IS_845G(dev) || IS_I865G(dev)) {
if ((width & 63) != 0)
@@ -8304,7 +8317,7 @@ static bool cursor_size_ok(struct drm_device *dev,
if (height > 1023)
return false;
} else {
- switch (width | height) {
+ switch (width) {
case 256:
case 128:
if (IS_GEN2(dev))
@@ -8314,6 +8327,16 @@ static bool cursor_size_ok(struct drm_device *dev,
default:
return false;
}
+
+ if (IS_IVYBRIDGE(dev) ||
+ IS_HASWELL(dev) || IS_BROADWELL(dev) ||
+ INTEL_INFO(dev)->gen >= 9) {
+ if (height < 8 || height > width)
+ return false;
+ } else {
+ if (height != width)
+ return false;
+ }
}
return true;
--
1.8.5.5
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