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drm/i915: WA: FBC Render Nuke.

Browse source 
WaFbcNukeOn3DBlt for IVB, HSW.

According BSPec: "Workaround: Do not enable Render Command Streamer tracking for FBC.
Instead insert a LRI to address 0x50380 with data 0x00000004 after the PIPE_CONTROL that
follows each render submission."

v2: Chris noticed that flush_domains check was missing here and also suggested to do
    LRI only when fbc is enabled. To avoid do a I915_READ on every flush lets use the
    module parameter check.

v3: Adding Wa name as Damien suggested.

v4: Ville noticed VLV doesn't support fbc at all and comment came wrong from spec.

v5: Ville noticed than on blt a Cache Clean LRI should be used instead the Nuke one.

v6: Check for flush domain on blt (by Ville).
    Check for scanout dirty (by Chris).

v7: Apply proper fbc_dirty implemented by Chris.

v8: remove unused variables.

Cc: Ville Syrjälä <[email protected]>
Cc: Chris Wilson <[email protected]>
Signed-off-by: Rodrigo Vivi <[email protected]>
Reviewed-by: Chris Wilson <[email protected]>
Signed-off-by: Daniel Vetter <[email protected]>
This commit is contained in:
Rodrigo Vivi 2013-06-06 16:58:16 -03:00 • committed by Daniel Vetter
commit fd3da6c95b
3 changed files with 34 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

4
drivers/gpu/drm/i915/i915_reg.h
View file

@ -1020,6 +1020,10 @@
#define IPS_CTL 0x43408
#define IPS_ENABLE (1 << 31)
#define MSG_FBC_REND_STATE 0x50380
#define FBC_REND_NUKE (1<<2)
#define FBC_REND_CACHE_CLEAN (1<<1)
#define _HSW_PIPE_SLICE_CHICKEN_1_A 0x420B0
#define _HSW_PIPE_SLICE_CHICKEN_1_B 0x420B4
#define HSW_BYPASS_FBC_QUEUE (1<<22)

2
drivers/gpu/drm/i915/intel_pm.c
View file

@ -274,7 +274,7 @@ static void gen7_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
struct drm_i915_gem_object *obj = intel_fb->obj;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
I915_WRITE(IVB_FBC_RT_BASE, obj->gtt_offset | ILK_FBC_RT_VALID);
I915_WRITE(IVB_FBC_RT_BASE, obj->gtt_offset);
I915_WRITE(ILK_DPFC_CONTROL, DPFC_CTL_EN | DPFC_CTL_LIMIT_1X |
IVB_DPFC_CTL_FENCE_EN |

29
drivers/gpu/drm/i915/intel_ringbuffer.c
View file

@ -280,6 +280,27 @@ gen7_render_ring_cs_stall_wa(struct intel_ring_buffer *ring)
return 0;
}
static int gen7_ring_fbc_flush(struct intel_ring_buffer *ring, u32 value)
{
int ret;
if (!ring->fbc_dirty)
return 0;
ret = intel_ring_begin(ring, 4);
if (ret)
return ret;
intel_ring_emit(ring, MI_NOOP);
/* WaFbcNukeOn3DBlt:ivb/hsw */
intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(1));
intel_ring_emit(ring, MSG_FBC_REND_STATE);
intel_ring_emit(ring, value);
intel_ring_advance(ring);
ring->fbc_dirty = false;
return 0;
}
static int
gen7_render_ring_flush(struct intel_ring_buffer *ring,
u32 invalidate_domains, u32 flush_domains)
@ -336,6 +357,9 @@ gen7_render_ring_flush(struct intel_ring_buffer *ring,
intel_ring_emit(ring, 0);
intel_ring_advance(ring);
if (flush_domains)
return gen7_ring_fbc_flush(ring, FBC_REND_NUKE);
return 0;
}
@ -1685,6 +1709,7 @@ gen6_ring_dispatch_execbuffer(struct intel_ring_buffer *ring,
static int gen6_ring_flush(struct intel_ring_buffer *ring,
u32 invalidate, u32 flush)
{
struct drm_device *dev = ring->dev;
uint32_t cmd;
int ret;
@ -1707,6 +1732,10 @@ static int gen6_ring_flush(struct intel_ring_buffer *ring,
intel_ring_emit(ring, 0);
intel_ring_emit(ring, MI_NOOP);
intel_ring_advance(ring);
if (IS_GEN7(dev) && flush)
return gen7_ring_fbc_flush(ring, FBC_REND_CACHE_CLEAN);
return 0;
}