On Thu, Nov 20, 2014 at 02:58:16PM +0000, Damien Lespiau wrote:
> Because the plane registers are different in Skylake we need to adapt
> the MMIO code as well.
>
> v2: Don't introduce yet another vfunc when the direction is do
> consolidate the plane updates to use the same code path (Daniel)
>
> v3:
> - Use enum pipe instead of int (Ville)
> - Also update PLANE_STRIDE when the tiling has changed (Ville)
> - Put intel_mark_page_flip_active() in the shared code (Damien)
>
> v4:
> - Remove unused variable
>
> v5:
> - Fix whitespace Vs tabs (Ville)
>
> Reviewed-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
> Signed-off-by: Damien Lespiau <damien.lesp...@intel.com>
Queued for -next, thanks for the patch.
-Daniel
> ---
> drivers/gpu/drm/i915/intel_display.c | 64
> ++++++++++++++++++++++++++++++++----
> 1 file changed, 57 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c
> b/drivers/gpu/drm/i915/intel_display.c
> index c0af4c6..211243b 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -9436,22 +9436,50 @@ static bool use_mmio_flip(struct intel_engine_cs
> *ring,
> return ring != obj->ring;
> }
>
> -static void intel_do_mmio_flip(struct intel_crtc *intel_crtc)
> +static void skl_do_mmio_flip(struct intel_crtc *intel_crtc)
> +{
> + struct drm_device *dev = intel_crtc->base.dev;
> + struct drm_i915_private *dev_priv = dev->dev_private;
> + struct drm_framebuffer *fb = intel_crtc->base.primary->fb;
> + struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
> + struct drm_i915_gem_object *obj = intel_fb->obj;
> + const enum pipe pipe = intel_crtc->pipe;
> + u32 ctl, stride;
> +
> + ctl = I915_READ(PLANE_CTL(pipe, 0));
> + ctl &= ~PLANE_CTL_TILED_MASK;
> + if (obj->tiling_mode == I915_TILING_X)
> + ctl |= PLANE_CTL_TILED_X;
> +
> + /*
> + * The stride is either expressed as a multiple of 64 bytes chunks for
> + * linear buffers or in number of tiles for tiled buffers.
> + */
> + stride = fb->pitches[0] >> 6;
> + if (obj->tiling_mode == I915_TILING_X)
> + stride = fb->pitches[0] >> 9; /* X tiles are 512 bytes wide */
> +
> + /*
> + * Both PLANE_CTL and PLANE_STRIDE are not updated on vblank but on
> + * PLANE_SURF updates, the update is then guaranteed to be atomic.
> + */
> + I915_WRITE(PLANE_CTL(pipe, 0), ctl);
> + I915_WRITE(PLANE_STRIDE(pipe, 0), stride);
> +
> + I915_WRITE(PLANE_SURF(pipe, 0), intel_crtc->unpin_work->gtt_offset);
> + POSTING_READ(PLANE_SURF(pipe, 0));
> +}
> +
> +static void ilk_do_mmio_flip(struct intel_crtc *intel_crtc)
> {
> struct drm_device *dev = intel_crtc->base.dev;
> struct drm_i915_private *dev_priv = dev->dev_private;
> struct intel_framebuffer *intel_fb =
> to_intel_framebuffer(intel_crtc->base.primary->fb);
> struct drm_i915_gem_object *obj = intel_fb->obj;
> - bool atomic_update;
> - u32 start_vbl_count;
> u32 dspcntr;
> u32 reg;
>
> - intel_mark_page_flip_active(intel_crtc);
> -
> - atomic_update = intel_pipe_update_start(intel_crtc, &start_vbl_count);
> -
> reg = DSPCNTR(intel_crtc->plane);
> dspcntr = I915_READ(reg);
>
> @@ -9466,6 +9494,28 @@ static void intel_do_mmio_flip(struct intel_crtc
> *intel_crtc)
> intel_crtc->unpin_work->gtt_offset);
> POSTING_READ(DSPSURF(intel_crtc->plane));
>
> +}
> +
> +/*
> + * XXX: This is the temporary way to update the plane registers until we get
> + * around to using the usual plane update functions for MMIO flips
> + */
> +static void intel_do_mmio_flip(struct intel_crtc *intel_crtc)
> +{
> + struct drm_device *dev = intel_crtc->base.dev;
> + bool atomic_update;
> + u32 start_vbl_count;
> +
> + intel_mark_page_flip_active(intel_crtc);
> +
> + atomic_update = intel_pipe_update_start(intel_crtc, &start_vbl_count);
> +
> + if (INTEL_INFO(dev)->gen >= 9)
> + skl_do_mmio_flip(intel_crtc);
> + else
> + /* use_mmio_flip() retricts MMIO flips to ilk+ */
> + ilk_do_mmio_flip(intel_crtc);
> +
> if (atomic_update)
> intel_pipe_update_end(intel_crtc, start_vbl_count);
> }
> --
> 1.8.3.1
>
> _______________________________________________
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> Intel-gfx@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
--
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
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