On Tue, Apr 23, 2013 at 02:52:19PM -0300, Rodrigo Vivi wrote:
> This patch introduce Frame Buffer Compression (FBC) support for HSW.
> FBC is tied to primary plane A in HSW.
The docs say FBC must be disabled before disabling the plane on HSW.
We're doing these steps in the opposite order on ILK+. Although maybe
it's not a big deal when were disabling the pipe too.
But I'd just change the order of these operations in both
ironlake_crtc_disable() and haswell_crtc_disable(). Otherwise people
will get confused every time they try to figure out why the order of
operations is different.
> ---
> drivers/gpu/drm/i915/i915_drv.c | 1 +
> drivers/gpu/drm/i915/intel_pm.c | 15 +++++++++------
> 2 files changed, 10 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> index a073b4c..6bf7ab4 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -315,6 +315,7 @@ 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/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index a33490c..972a1a3 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -275,10 +275,12 @@ static void gen7_enable_fbc(struct drm_crtc *crtc,
> unsigned long interval)
> IVB_DPFC_CTL_FENCE_EN |
> intel_crtc->plane << IVB_DPFC_CTL_PLANE_SHIFT);
>
> - /* WaFbcAsynchFlipDisableFbcQueue */
> - I915_WRITE(ILK_DISPLAY_CHICKEN1, ILK_FBCQ_DIS);
> - /* WaFbcDisableDpfcClockGating */
> - I915_WRITE(ILK_DSPCLK_GATE_D, ILK_DPFCUNIT_CLOCK_GATE_DISABLE);
> + if (IS_IVYBRIDGE(dev)) {
> + /* WaFbcAsynchFlipDisableFbcQueue */
> + I915_WRITE(ILK_DISPLAY_CHICKEN1, ILK_FBCQ_DIS);
> + /* WaFbcDisableDpfcClockGating */
> + I915_WRITE(ILK_DSPCLK_GATE_D, ILK_DPFCUNIT_CLOCK_GATE_DISABLE);
> + }
>
> I915_WRITE(SNB_DPFC_CTL_SA,
> SNB_CPU_FENCE_ENABLE | obj->fence_reg);
> @@ -496,7 +498,8 @@ 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;
> @@ -4216,7 +4219,7 @@ 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;
> - if (IS_IVYBRIDGE(dev))
> + if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev))
> dev_priv->display.enable_fbc =
> gen7_enable_fbc;
> else
> --
> 1.8.1.4
>
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
--
Ville Syrjälä
Intel OTC
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