[Intel-gfx] [PATCH 04/12] drm/i915: add plane enable/disable functions
Jesse Barnes
jbarnes at virtuousgeek.org
Wed Jan 5 00:09:31 CET 2011
Add plane enable/disable functions to prevent duplicated code and allow
us to easily check for plane enable/disable requirements (such as pipe
enable).
Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>
---
drivers/gpu/drm/i915/i915_reg.h | 5 +-
drivers/gpu/drm/i915/intel_display.c | 133 +++++++++++++++++++++-------------
2 files changed, 84 insertions(+), 54 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 2b6cafb..796dee5 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -2527,9 +2527,10 @@
#define DISPPLANE_32BPP_30BIT_NO_ALPHA (0xa<<26)
#define DISPPLANE_STEREO_ENABLE (1<<25)
#define DISPPLANE_STEREO_DISABLE 0
-#define DISPPLANE_SEL_PIPE_MASK (1<<24)
+#define DISPPLANE_SEL_PIPE_SHIFT 24
+#define DISPPLANE_SEL_PIPE_MASK (3<<DISPPLANE_SEL_PIPE_SHIFT)
#define DISPPLANE_SEL_PIPE_A 0
-#define DISPPLANE_SEL_PIPE_B (1<<24)
+#define DISPPLANE_SEL_PIPE_B (1<<DISPPLANE_SEL_PIPE_SHIFT)
#define DISPPLANE_SRC_KEY_ENABLE (1<<22)
#define DISPPLANE_SRC_KEY_DISABLE 0
#define DISPPLANE_LINE_DOUBLE (1<<20)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index afe4ebd..bc1478b 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1086,6 +1086,19 @@ static void assert_pll(struct drm_i915_private *dev_priv, enum pipe pipe,
#define assert_pll_enabled(d, p) assert_pll(d, p, on)
#define assert_pll_disabled(d, p) assert_pll(d, p, off)
+static void assert_pipe_enabled(struct drm_i915_private *dev_priv,
+ enum pipe pipe)
+{
+ int reg;
+ u32 val;
+
+ reg = PIPECONF(pipe);
+ val = I915_READ(reg);
+ WARN(!(val & PIPECONF_ENABLE),
+ "pipe %c assertion failure, should be active but is disabled\n",
+ pipe ? 'B' : 'A');
+}
+
static void assert_plane_enabled(struct drm_i915_private *dev_priv,
enum plane plane)
{
@@ -1188,6 +1201,65 @@ static void intel_disable_pipe(struct drm_i915_private *dev_priv,
intel_wait_for_pipe_off(dev_priv->dev, pipe);
}
+/**
+ * intel_enable_plane - enable a display plane on a given pipe
+ * @dev_priv: i915 private structure
+ * @plane: plane to enable
+ * @pipe: pipe being fed
+ *
+ * Enable @plane on @pipe, making sure that @pipe is running first.
+ */
+static void intel_enable_plane(struct drm_i915_private *dev_priv,
+ enum plane plane, enum pipe pipe)
+{
+ int reg;
+ u32 val;
+
+ /* If the pipe isn't enabled, we can't pump pixels and may hang */
+ assert_pipe_enabled(dev_priv, pipe);
+
+ reg = DSPCNTR(plane);
+ val = I915_READ(reg);
+ val |= DISPLAY_PLANE_ENABLE;
+ I915_WRITE(reg, val);
+ POSTING_READ(reg);
+ intel_wait_for_vblank(dev_priv->dev, pipe);
+}
+
+/*
+ * Plane regs are double buffered, going from enabled->disabled needs a
+ * trigger in order to latch. The display address reg provides this.
+ */
+static void intel_flush_display_plane(struct drm_i915_private *dev_priv,
+ enum plane plane)
+{
+ u32 reg = DSPADDR(plane);
+ I915_WRITE(reg, I915_READ(reg));
+}
+
+/**
+ * intel_disable_plane - disable a display plane
+ * @dev_priv: i915 private structure
+ * @plane: plane to disable
+ * @pipe: pipe consuming the data
+ *
+ * Disable @plane; should be an independent operation.
+ */
+static void intel_disable_plane(struct drm_i915_private *dev_priv,
+ enum plane plane, enum pipe pipe)
+{
+ int reg;
+ u32 val;
+
+ reg = DSPCNTR(plane);
+ val = I915_READ(reg);
+ val &= ~DISPLAY_PLANE_ENABLE;
+ I915_WRITE(reg, val);
+ POSTING_READ(reg);
+ intel_flush_display_plane(dev_priv, plane);
+ intel_wait_for_vblank(dev_priv->dev, pipe);
+}
+
static void i8xx_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
{
struct drm_device *dev = crtc->dev;
@@ -2112,14 +2184,6 @@ static void ironlake_fdi_enable(struct drm_crtc *crtc)
}
}
-static void intel_flush_display_plane(struct drm_device *dev,
- int plane)
-{
- struct drm_i915_private *dev_priv = dev->dev_private;
- u32 reg = DSPADDR(plane);
- I915_WRITE(reg, I915_READ(reg));
-}
-
/*
* When we disable a pipe, we need to clear any pending scanline wait events
* to avoid hanging the ring, which we assume we are waiting on.
@@ -2193,14 +2257,7 @@ static void ironlake_crtc_enable(struct drm_crtc *crtc)
}
intel_enable_pipe(dev_priv, pipe);
-
- /* configure and enable CPU plane */
- reg = DSPCNTR(plane);
- temp = I915_READ(reg);
- if ((temp & DISPLAY_PLANE_ENABLE) == 0) {
- I915_WRITE(reg, temp | DISPLAY_PLANE_ENABLE);
- intel_flush_display_plane(dev, plane);
- }
+ intel_enable_plane(dev_priv, plane, pipe);
/* For PCH output, training FDI link */
if (IS_GEN6(dev))
@@ -2308,13 +2365,7 @@ static void ironlake_crtc_disable(struct drm_crtc *crtc)
drm_vblank_off(dev, pipe);
intel_crtc_update_cursor(crtc, false);
- /* Disable display plane */
- reg = DSPCNTR(plane);
- temp = I915_READ(reg);
- if (temp & DISPLAY_PLANE_ENABLE) {
- I915_WRITE(reg, temp & ~DISPLAY_PLANE_ENABLE);
- intel_flush_display_plane(dev, plane);
- }
+ intel_disable_plane(dev_priv, plane, pipe);
if (dev_priv->cfb_plane == plane &&
dev_priv->display.disable_fbc)
@@ -2516,14 +2567,7 @@ static void i9xx_crtc_enable(struct drm_crtc *crtc)
}
intel_enable_pipe(dev_priv, pipe);
-
- /* Enable the plane */
- reg = DSPCNTR(plane);
- temp = I915_READ(reg);
- if ((temp & DISPLAY_PLANE_ENABLE) == 0) {
- I915_WRITE(reg, temp | DISPLAY_PLANE_ENABLE);
- intel_flush_display_plane(dev, plane);
- }
+ intel_enable_plane(dev_priv, plane, pipe);
intel_crtc_load_lut(crtc);
intel_update_fbc(dev);
@@ -2555,18 +2599,7 @@ static void i9xx_crtc_disable(struct drm_crtc *crtc)
dev_priv->display.disable_fbc)
dev_priv->display.disable_fbc(dev);
- /* Disable display plane */
- reg = DSPCNTR(plane);
- temp = I915_READ(reg);
- if (temp & DISPLAY_PLANE_ENABLE) {
- I915_WRITE(reg, temp & ~DISPLAY_PLANE_ENABLE);
- /* Flush the plane changes */
- intel_flush_display_plane(dev, plane);
-
- /* Wait for vblank for the disable to take effect */
- if (IS_GEN2(dev))
- intel_wait_for_vblank(dev, pipe);
- }
+ intel_disable_plane(dev_priv, plane, pipe);
/* Don't disable pipe A or pipe A PLLs if needed */
if (pipe == 0 && (dev_priv->quirks & QUIRK_PIPEA_FORCE))
@@ -4312,10 +4345,8 @@ static int intel_crtc_mode_set(struct drm_crtc *crtc,
pipeconf &= ~PIPECONF_DOUBLE_WIDE;
}
- if (!HAS_PCH_SPLIT(dev)) {
- dspcntr |= DISPLAY_PLANE_ENABLE;
+ if (!HAS_PCH_SPLIT(dev))
dpll |= DPLL_VCO_ENABLE;
- }
DRM_DEBUG_KMS("Mode for pipe %c:\n", pipe == 0 ? 'A' : 'B');
drm_mode_debug_printmodeline(mode);
@@ -4536,6 +4567,9 @@ static int intel_crtc_mode_set(struct drm_crtc *crtc,
}
I915_WRITE(DSPCNTR(plane), dspcntr);
+ POSTING_READ(DSPCNTR(plane));
+ if (!HAS_PCH_SPLIT(dev))
+ intel_enable_plane(dev_priv, plane, pipe);
ret = intel_pipe_set_base(crtc, x, y, old_fb);
@@ -5674,12 +5708,7 @@ static void intel_sanitize_modesetting(struct drm_device *dev,
pipe = !pipe;
/* Disable the plane and wait for it to stop reading from the pipe. */
- I915_WRITE(reg, val & ~DISPLAY_PLANE_ENABLE);
- intel_flush_display_plane(dev, plane);
-
- if (IS_GEN2(dev))
- intel_wait_for_vblank(dev, pipe);
-
+ intel_disable_plane(dev_priv, plane, pipe);
intel_disable_pipe(dev_priv, pipe);
}
--
1.7.0.4
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