From 67a98f7e27baf8c22483ec4873a8d8efdf71b55d Mon Sep 17 00:00:00 2001 From: Maarten Lankhorst Date: Fri, 6 Dec 2024 19:20:32 +0100 Subject: [PATCH] drm/xe/display: Re-use display vmas when possible i915 has this really nice, infrastructure where everything becomes complicated, GGTT needs eviction, etc.. Lets not do that, and make the dumbest possible interface instead. Try to retrieve the VMA from old_plane_state, or intel_fbdev if kernel fb. Link: https://patchwork.freedesktop.org/patch/msgid/20241206182032.196307-1-dev@lankhorst.se Signed-off-by: Maarten Lankhorst Reviewed-by: Animesh Manna Tested-by: Jani Saarinen --- .../gpu/drm/i915/display/intel_atomic_plane.c | 2 +- drivers/gpu/drm/i915/display/intel_cursor.c | 2 +- drivers/gpu/drm/i915/display/intel_fb_pin.c | 3 +- drivers/gpu/drm/i915/display/intel_fb_pin.h | 3 +- drivers/gpu/drm/i915/display/intel_fbdev.c | 5 ++ drivers/gpu/drm/i915/display/intel_fbdev.h | 8 ++++ .../gpu/drm/xe/compat-i915-headers/i915_vma.h | 3 ++ drivers/gpu/drm/xe/display/xe_fb_pin.c | 48 +++++++++++++++++-- 8 files changed, 65 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_atomic_plane.c b/drivers/gpu/drm/i915/display/intel_atomic_plane.c index 5e0e07496867..c558143f4f82 100644 --- a/drivers/gpu/drm/i915/display/intel_atomic_plane.c +++ b/drivers/gpu/drm/i915/display/intel_atomic_plane.c @@ -1135,7 +1135,7 @@ intel_prepare_plane_fb(struct drm_plane *_plane, if (!obj) return 0; - ret = intel_plane_pin_fb(new_plane_state); + ret = intel_plane_pin_fb(new_plane_state, old_plane_state); if (ret) return ret; diff --git a/drivers/gpu/drm/i915/display/intel_cursor.c b/drivers/gpu/drm/i915/display/intel_cursor.c index 57cf8f46a458..ae7243ad6e0c 100644 --- a/drivers/gpu/drm/i915/display/intel_cursor.c +++ b/drivers/gpu/drm/i915/display/intel_cursor.c @@ -865,7 +865,7 @@ intel_legacy_cursor_update(struct drm_plane *_plane, if (ret) goto out_free; - ret = intel_plane_pin_fb(new_plane_state); + ret = intel_plane_pin_fb(new_plane_state, old_plane_state); if (ret) goto out_free; diff --git a/drivers/gpu/drm/i915/display/intel_fb_pin.c b/drivers/gpu/drm/i915/display/intel_fb_pin.c index d3a86f9c6bc8..dd3ac7f98dfc 100644 --- a/drivers/gpu/drm/i915/display/intel_fb_pin.c +++ b/drivers/gpu/drm/i915/display/intel_fb_pin.c @@ -252,7 +252,8 @@ intel_plane_fb_min_phys_alignment(const struct intel_plane_state *plane_state) return plane->min_alignment(plane, fb, 0); } -int intel_plane_pin_fb(struct intel_plane_state *plane_state) +int intel_plane_pin_fb(struct intel_plane_state *plane_state, + const struct intel_plane_state *old_plane_state) { struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane); const struct intel_framebuffer *fb = diff --git a/drivers/gpu/drm/i915/display/intel_fb_pin.h b/drivers/gpu/drm/i915/display/intel_fb_pin.h index ac0319b53af0..0fc6d9044638 100644 --- a/drivers/gpu/drm/i915/display/intel_fb_pin.h +++ b/drivers/gpu/drm/i915/display/intel_fb_pin.h @@ -23,7 +23,8 @@ intel_fb_pin_to_ggtt(const struct drm_framebuffer *fb, void intel_fb_unpin_vma(struct i915_vma *vma, unsigned long flags); -int intel_plane_pin_fb(struct intel_plane_state *plane_state); +int intel_plane_pin_fb(struct intel_plane_state *new_plane_state, + const struct intel_plane_state *old_plane_state); void intel_plane_unpin_fb(struct intel_plane_state *old_plane_state); #endif diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.c b/drivers/gpu/drm/i915/display/intel_fbdev.c index 00852ff5b247..6c0808133397 100644 --- a/drivers/gpu/drm/i915/display/intel_fbdev.c +++ b/drivers/gpu/drm/i915/display/intel_fbdev.c @@ -695,3 +695,8 @@ struct intel_framebuffer *intel_fbdev_framebuffer(struct intel_fbdev *fbdev) return to_intel_framebuffer(fbdev->helper.fb); } + +struct i915_vma *intel_fbdev_vma_pointer(struct intel_fbdev *fbdev) +{ + return fbdev ? fbdev->vma : NULL; +} diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.h b/drivers/gpu/drm/i915/display/intel_fbdev.h index 08de2d5b3433..24a3434558cb 100644 --- a/drivers/gpu/drm/i915/display/intel_fbdev.h +++ b/drivers/gpu/drm/i915/display/intel_fbdev.h @@ -17,6 +17,8 @@ struct intel_framebuffer; void intel_fbdev_setup(struct drm_i915_private *dev_priv); void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous); struct intel_framebuffer *intel_fbdev_framebuffer(struct intel_fbdev *fbdev); +struct i915_vma *intel_fbdev_vma_pointer(struct intel_fbdev *fbdev); + #else static inline void intel_fbdev_setup(struct drm_i915_private *dev_priv) { @@ -30,6 +32,12 @@ static inline struct intel_framebuffer *intel_fbdev_framebuffer(struct intel_fbd { return NULL; } + +static inline struct i915_vma *intel_fbdev_vma_pointer(struct intel_fbdev *fbdev) +{ + return NULL; +} + #endif #endif /* __INTEL_FBDEV_H__ */ diff --git a/drivers/gpu/drm/xe/compat-i915-headers/i915_vma.h b/drivers/gpu/drm/xe/compat-i915-headers/i915_vma.h index bdae8392e125..4465c40f8134 100644 --- a/drivers/gpu/drm/xe/compat-i915-headers/i915_vma.h +++ b/drivers/gpu/drm/xe/compat-i915-headers/i915_vma.h @@ -10,6 +10,8 @@ #include "xe_ggtt_types.h" +#include + /* We don't want these from i915_drm.h in case of Xe */ #undef I915_TILING_X #undef I915_TILING_Y @@ -19,6 +21,7 @@ struct xe_bo; struct i915_vma { + refcount_t ref; struct xe_bo *bo, *dpt; struct xe_ggtt_node *node; }; diff --git a/drivers/gpu/drm/xe/display/xe_fb_pin.c b/drivers/gpu/drm/xe/display/xe_fb_pin.c index 9fa51b84737c..25ce032bb293 100644 --- a/drivers/gpu/drm/xe/display/xe_fb_pin.c +++ b/drivers/gpu/drm/xe/display/xe_fb_pin.c @@ -9,6 +9,7 @@ #include "intel_dpt.h" #include "intel_fb.h" #include "intel_fb_pin.h" +#include "intel_fbdev.h" #include "xe_bo.h" #include "xe_device.h" #include "xe_ggtt.h" @@ -287,6 +288,7 @@ static struct i915_vma *__xe_pin_fb_vma(const struct intel_framebuffer *fb, if (!vma) return ERR_PTR(-ENODEV); + refcount_set(&vma->ref, 1); if (IS_DGFX(to_xe_device(bo->ttm.base.dev)) && intel_fb_rc_ccs_cc_plane(&fb->base) >= 0 && !(bo->flags & XE_BO_FLAG_NEEDS_CPU_ACCESS)) { @@ -347,6 +349,9 @@ static void __xe_unpin_fb_vma(struct i915_vma *vma) { u8 tile_id = vma->node->ggtt->tile->id; + if (!refcount_dec_and_test(&vma->ref)) + return; + if (vma->dpt) xe_bo_unpin_map_no_vm(vma->dpt); else if (!xe_ggtt_node_allocated(vma->bo->ggtt_node[tile_id]) || @@ -377,25 +382,58 @@ void intel_fb_unpin_vma(struct i915_vma *vma, unsigned long flags) __xe_unpin_fb_vma(vma); } -int intel_plane_pin_fb(struct intel_plane_state *plane_state) +static bool reuse_vma(struct intel_plane_state *new_plane_state, + const struct intel_plane_state *old_plane_state) { - struct drm_framebuffer *fb = plane_state->hw.fb; + struct intel_framebuffer *fb = to_intel_framebuffer(new_plane_state->hw.fb); + struct xe_device *xe = to_xe_device(fb->base.dev); + struct i915_vma *vma; + + if (old_plane_state->hw.fb == new_plane_state->hw.fb && + !memcmp(&old_plane_state->view.gtt, + &new_plane_state->view.gtt, + sizeof(new_plane_state->view.gtt))) { + vma = old_plane_state->ggtt_vma; + goto found; + } + + if (fb == intel_fbdev_framebuffer(xe->display.fbdev.fbdev)) { + vma = intel_fbdev_vma_pointer(xe->display.fbdev.fbdev); + if (vma) + goto found; + } + + return false; + +found: + refcount_inc(&vma->ref); + new_plane_state->ggtt_vma = vma; + return true; +} + +int intel_plane_pin_fb(struct intel_plane_state *new_plane_state, + const struct intel_plane_state *old_plane_state) +{ + struct drm_framebuffer *fb = new_plane_state->hw.fb; struct drm_gem_object *obj = intel_fb_bo(fb); struct xe_bo *bo = gem_to_xe_bo(obj); struct i915_vma *vma; struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb); - struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane); + struct intel_plane *plane = to_intel_plane(new_plane_state->uapi.plane); u64 phys_alignment = plane->min_alignment(plane, fb, 0); + if (reuse_vma(new_plane_state, old_plane_state)) + return 0; + /* We reject creating !SCANOUT fb's, so this is weird.. */ drm_WARN_ON(bo->ttm.base.dev, !(bo->flags & XE_BO_FLAG_SCANOUT)); - vma = __xe_pin_fb_vma(intel_fb, &plane_state->view.gtt, phys_alignment); + vma = __xe_pin_fb_vma(intel_fb, &new_plane_state->view.gtt, phys_alignment); if (IS_ERR(vma)) return PTR_ERR(vma); - plane_state->ggtt_vma = vma; + new_plane_state->ggtt_vma = vma; return 0; } -- 2.25.1