@@ -1020,6 +1020,8 @@
/* Framebuffer compression for Ivybridge */
#define IVB_FBC_RT_BASE 0x7020
+#define IPS_CTL 0x43408
+#define IPS_ENABLE (1 << 31)
#define _HSW_PIPE_SLICE_CHICKEN_1_A 0x420B0
#define _HSW_PIPE_SLICE_CHICKEN_1_B 0x420B4
@@ -3663,6 +3665,15 @@
#define _LGC_PALETTE_B 0x4a800
#define LGC_PALETTE(pipe) _PIPE(pipe, _LGC_PALETTE_A, _LGC_PALETTE_B)
+#define _GAMMA_MODE_A 0x4a480
+#define _GAMMA_MODE_B 0x4ac80
+#define GAMMA_MODE(pipe) _PIPE(pipe, _GAMMA_MODE_A, _GAMMA_MODE_B)
+#define GAMMA_MODE_MODE_MASK (3 << 0)
+#define GAMMA_MODE_MODE_8bit (0 << 0)
+#define GAMMA_MODE_MODE_10bit (1 << 0)
+#define GAMMA_MODE_MODE_12bit (2 << 0)
+#define GAMMA_MODE_MODE_SPLIT (3 << 0)
+
/* interrupts */
#define DE_MASTER_IRQ_CONTROL (1 << 31)
#define DE_SPRITEB_FLIP_DONE (1 << 29)
@@ -3247,6 +3247,42 @@ static void ironlake_crtc_enable(struct drm_crtc *crtc)
intel_wait_for_vblank(dev, intel_crtc->pipe);
}
+/* IPS only exists on ULT machines and is tied to pipe A. */
+static bool hsw_crtc_supports_ips(struct intel_crtc *crtc)
+{
+ return IS_ULT(crtc->base.dev) && crtc->pipe == PIPE_A;
+}
+
+static void hsw_enable_ips(struct intel_crtc *crtc)
+{
+ struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
+
+ if (!crtc->config.ips_enabled)
+ return;
+
+ /* We can only enable IPS after we enable a plane and wait for a vblank.
+ * We guarantee that the plane is enabled by calling intel_enable_ips
+ * only after intel_enable_plane. And intel_enable_plane already waits
+ * for a vblank, so all we need to do here is to enable the IPS bit. */
+ assert_plane_enabled(dev_priv, crtc->plane);
+ I915_WRITE(IPS_CTL, IPS_ENABLE);
+}
+
+static void hsw_disable_ips(struct intel_crtc *crtc)
+{
+ struct drm_device *dev = crtc->base.dev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+ if (!crtc->config.ips_enabled)
+ return;
+
+ assert_plane_enabled(dev_priv, crtc->plane);
+ I915_WRITE(IPS_CTL, 0);
+
+ /* We need to wait for a vblank before we can disable the plane. */
+ intel_wait_for_vblank(dev, crtc->pipe);
+}
+
static void haswell_crtc_enable(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
@@ -3294,6 +3330,8 @@ static void haswell_crtc_enable(struct drm_crtc *crtc)
intel_crtc->config.has_pch_encoder);
intel_enable_plane(dev_priv, plane, pipe);
+ hsw_enable_ips(intel_crtc);
+
if (intel_crtc->config.has_pch_encoder)
lpt_pch_enable(crtc);
@@ -3436,6 +3474,8 @@ static void haswell_crtc_disable(struct drm_crtc *crtc)
if (dev_priv->cfb_plane == plane)
intel_disable_fbc(dev);
+ hsw_disable_ips(intel_crtc);
+
intel_disable_plane(dev_priv, plane, pipe);
if (intel_crtc->config.has_pch_encoder)
@@ -3996,11 +4036,19 @@ retry:
return setup_ok ? 0 : -EINVAL;
}
+static void hsw_compute_ips_config(struct intel_crtc *crtc,
+ struct intel_crtc_config *pipe_config)
+{
+ pipe_config->ips_enabled = hsw_crtc_supports_ips(crtc) &&
+ pipe_config->pipe_bpp == 24;
+}
+
static int intel_crtc_compute_config(struct drm_crtc *crtc,
struct intel_crtc_config *pipe_config)
{
struct drm_device *dev = crtc->dev;
struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode;
+ struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
if (HAS_PCH_SPLIT(dev)) {
/* FDI link clock is fixed at 2.7G */
@@ -4030,8 +4078,11 @@ static int intel_crtc_compute_config(struct drm_crtc *crtc,
pipe_config->pipe_bpp = 8*3;
}
+ if (IS_HASWELL(dev))
+ hsw_compute_ips_config(intel_crtc, pipe_config);
+
if (pipe_config->has_pch_encoder)
- return ironlake_fdi_compute_config(to_intel_crtc(crtc), pipe_config);
+ return ironlake_fdi_compute_config(intel_crtc, pipe_config);
return 0;
}
@@ -5937,6 +5988,9 @@ static bool haswell_get_pipe_config(struct intel_crtc *crtc,
if (intel_display_power_enabled(dev, pfit_domain))
ironlake_get_pfit_config(crtc, pipe_config);
+ pipe_config->ips_enabled = hsw_crtc_supports_ips(crtc) &&
+ (I915_READ(IPS_CTL) & IPS_ENABLE);
+
return true;
}
@@ -6241,8 +6295,10 @@ void intel_crtc_load_lut(struct drm_crtc *crtc)
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
- int palreg = PALETTE(intel_crtc->pipe);
+ enum pipe pipe = intel_crtc->pipe;
+ int palreg = PALETTE(pipe);
int i;
+ bool reenable_ips = false;
/* The clocks have to be on to load the palette. */
if (!crtc->enabled || !intel_crtc->active)
@@ -6250,7 +6306,17 @@ void intel_crtc_load_lut(struct drm_crtc *crtc)
/* use legacy palette for Ironlake */
if (HAS_PCH_SPLIT(dev))
- palreg = LGC_PALETTE(intel_crtc->pipe);
+ palreg = LGC_PALETTE(pipe);
+
+ /* Workaround : Do not read or write the pipe palette/gamma data while
+ * GAMMA_MODE is configured for split gamma and IPS_CTL has IPS enabled.
+ */
+ if (intel_crtc->config.ips_enabled &&
+ ((I915_READ(GAMMA_MODE(pipe)) & GAMMA_MODE_MODE_MASK) ==
+ GAMMA_MODE_MODE_SPLIT)) {
+ hsw_disable_ips(intel_crtc);
+ reenable_ips = true;
+ }
for (i = 0; i < 256; i++) {
I915_WRITE(palreg + 4 * i,
@@ -6258,6 +6324,9 @@ void intel_crtc_load_lut(struct drm_crtc *crtc)
(intel_crtc->lut_g[i] << 8) |
intel_crtc->lut_b[i]);
}
+
+ if (reenable_ips)
+ hsw_enable_ips(intel_crtc);
}
static void i845_update_cursor(struct drm_crtc *crtc, u32 base)
@@ -7685,6 +7754,7 @@ static void intel_dump_pipe_config(struct intel_crtc *crtc,
DRM_DEBUG_KMS("pch pfit: pos: 0x%08x, size: 0x%08x\n",
pipe_config->pch_pfit.pos,
pipe_config->pch_pfit.size);
+ DRM_DEBUG_KMS("ips: %i\n", pipe_config->ips_enabled);
}
static struct intel_crtc_config *
@@ -8001,6 +8071,8 @@ intel_pipe_config_compare(struct drm_device *dev,
PIPE_CONF_CHECK_I(pch_pfit.pos);
PIPE_CONF_CHECK_I(pch_pfit.size);
+ PIPE_CONF_CHECK_I(ips_enabled);
+
#undef PIPE_CONF_CHECK_I
#undef PIPE_CONF_CHECK_FLAGS
@@ -268,6 +268,8 @@ struct intel_crtc_config {
/* FDI configuration, only valid if has_pch_encoder is set. */
int fdi_lanes;
struct intel_link_m_n fdi_m_n;
+
+ bool ips_enabled;
};
struct intel_crtc {