This patch introduce Frame Buffer Compression (FBC) support for HSW.
It adds a new function haswell_enable_fbc to avoid getting
ironlake_enable_fbc messed with many IS_HASWELL checks.
v2: Fixes from Ville.
* Fix Plane. FBC is tied to primary plane A in HSW
* Fix DPFC initial write to avoid let trash on the register.
v3: Checking for bad plane on intel_update_fbc() as Chris suggested.
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Ville Syrj?l? <ville.syrjala at linux.intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi at gmail.com>
---
drivers/gpu/drm/i915/i915_drv.c | 1 +
drivers/gpu/drm/i915/i915_reg.h | 6 ++++++
drivers/gpu/drm/i915/intel_pm.c | 43 +++++++++++++++++++++++++++++++++++++++--
3 files changed, 48 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 0cfc778..88fd6fb 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -291,6 +291,7 @@ static const struct intel_device_info intel_haswell_m_info = {
GEN7_FEATURES,
.is_haswell = 1,
.is_mobile = 1,
+ .has_fbc = 1,
};
static const struct pci_device_id pciidlist[] = { /* aka */
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 5e91fbb..cb8e213 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -849,6 +849,12 @@
#define SNB_CPU_FENCE_ENABLE (1<<29)
#define DPFC_CPU_FENCE_OFFSET 0x100104
+/* Framebuffer compression for Haswell */
+#define HSW_FBC_RT_BASE 0x7020
+#define HSW_FBC_RT_BASE_ADDR_SHIFT 12
+
+#define HSW_DPFC_CTL_FENCE_EN (1<<28)
+#define HSW_DPFC_CTL_DISABLE_SLB_INIT (1<<15)
/*
* GPIO regs
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 27f94cd..a88ae3c 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -253,6 +253,39 @@ static bool ironlake_fbc_enabled(struct drm_device *dev)
return I915_READ(ILK_DPFC_CONTROL) & DPFC_CTL_EN;
}
+static void haswell_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
+{
+ struct drm_device *dev = crtc->dev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct drm_framebuffer *fb = crtc->fb;
+ struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
+ struct drm_i915_gem_object *obj = intel_fb->obj;
+ struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+ unsigned long stall_watermark = 200;
+
+ I915_WRITE(ILK_DPFC_RECOMP_CTL, DPFC_RECOMP_STALL_EN |
+ (stall_watermark << DPFC_RECOMP_STALL_WM_SHIFT) |
+ (interval << DPFC_RECOMP_TIMER_COUNT_SHIFT));
+ I915_WRITE(HSW_FBC_RT_BASE,
+ obj->gtt_offset << HSW_FBC_RT_BASE_ADDR_SHIFT |
+ ILK_FBC_RT_VALID);
+
+ I915_WRITE(ILK_DPFC_CONTROL, DPFC_CTL_EN | DPFC_CTL_LIMIT_1X |
+ (HSW_DPFC_CTL_FENCE_EN | obj->fence_reg) |
+ HSW_DPFC_CTL_DISABLE_SLB_INIT);
+
+ if (obj->fence_reg != I915_FENCE_REG_NONE) {
+ I915_WRITE(SNB_DPFC_CTL_SA,
+ SNB_CPU_FENCE_ENABLE | obj->fence_reg);
+ I915_WRITE(DPFC_CPU_FENCE_OFFSET, crtc->y);
+ } else
+ I915_WRITE(SNB_DPFC_CTL_SA, ~SNB_CPU_FENCE_ENABLE);
+
+ sandybridge_blit_fbc_update(dev);
+
+ DRM_DEBUG_KMS("enabled fbc on plane A\n");
+}
+
bool intel_fbc_enabled(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
@@ -460,7 +493,8 @@ void intel_update_fbc(struct drm_device *dev)
dev_priv->no_fbc_reason = FBC_MODE_TOO_LARGE;
goto out_disable;
}
- if ((IS_I915GM(dev) || IS_I945GM(dev)) && intel_crtc->plane != 0) {
+ if ((IS_I915GM(dev) || IS_I945GM(dev) || IS_HASWELL(dev))
+ && intel_crtc->plane != 0) {
DRM_DEBUG_KMS("plane not 0, disabling compression\n");
dev_priv->no_fbc_reason = FBC_BAD_PLANE;
goto out_disable;
@@ -4158,7 +4192,12 @@ void intel_init_pm(struct drm_device *dev)
if (I915_HAS_FBC(dev)) {
if (HAS_PCH_SPLIT(dev)) {
dev_priv->display.fbc_enabled = ironlake_fbc_enabled;
- dev_priv->display.enable_fbc = ironlake_enable_fbc;
+ if (IS_HASWELL(dev))
+ dev_priv->display.enable_fbc =
+ haswell_enable_fbc;
+ else
+ dev_priv->display.enable_fbc =
+ ironlake_enable_fbc;
dev_priv->display.disable_fbc = ironlake_disable_fbc;
} else if (IS_GM45(dev)) {
dev_priv->display.fbc_enabled = g4x_fbc_enabled;
--
1.8.1.4
