From: Ville Syrjälä ville.syrjala@linux.intel.com
Properly clip the source when the destination gets clipped by the pipe dimensions.
Sadly the video sprite hardware is rather limited so it can't do proper sub-pixel postitioning. Resort to a best effort approach, where the source coordinates are rounded to the nearest (macro)pixel boundary.
Also do some additional checking against various hardware limits.
Signed-off-by: Ville Syrjälä ville.syrjala@linux.intel.com --- drivers/gpu/drm/i915/intel_sprite.c | 171 +++++++++++++++++++++++------------ 1 files changed, 111 insertions(+), 60 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c index 827dcd4..77ca0da 100644 --- a/drivers/gpu/drm/i915/intel_sprite.c +++ b/drivers/gpu/drm/i915/intel_sprite.c @@ -120,11 +120,10 @@ ivb_update_plane(struct drm_plane *plane, struct drm_framebuffer *fb, I915_WRITE(SPRSTRIDE(pipe), fb->pitches[0]); I915_WRITE(SPRPOS(pipe), (crtc_y << 16) | crtc_x);
- linear_offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8); + linear_offset = y * fb->pitches[0] + x * pixel_size; sprsurf_offset = intel_gen4_compute_offset_xtiled(&x, &y, - fb->bits_per_pixel / 8, - fb->pitches[0]); + pixel_size, fb->pitches[0]); linear_offset -= sprsurf_offset;
/* HSW consolidates SPRTILEOFF and SPRLINOFF into a single SPROFFSET @@ -286,11 +285,10 @@ ilk_update_plane(struct drm_plane *plane, struct drm_framebuffer *fb, I915_WRITE(DVSSTRIDE(pipe), fb->pitches[0]); I915_WRITE(DVSPOS(pipe), (crtc_y << 16) | crtc_x);
- linear_offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8); + linear_offset = y * fb->pitches[0] + x * pixel_size; dvssurf_offset = intel_gen4_compute_offset_xtiled(&x, &y, - fb->bits_per_pixel / 8, - fb->pitches[0]); + pixel_size, fb->pitches[0]); linear_offset -= dvssurf_offset;
if (obj->tiling_mode != I915_TILING_NONE) @@ -409,6 +407,20 @@ ilk_get_colorkey(struct drm_plane *plane, struct drm_intel_sprite_colorkey *key) key->flags = I915_SET_COLORKEY_NONE; }
+static bool +format_is_yuv(uint32_t format) +{ + switch (format) { + case DRM_FORMAT_YUYV: + case DRM_FORMAT_UYVY: + case DRM_FORMAT_VYUY: + case DRM_FORMAT_YVYU: + return true; + default: + return false; + } +} + static int intel_update_plane(struct drm_plane *plane, struct drm_crtc *crtc, struct drm_framebuffer *fb, int crtc_x, int crtc_y, @@ -420,35 +432,68 @@ intel_update_plane(struct drm_plane *plane, struct drm_crtc *crtc, struct drm_i915_private *dev_priv = dev->dev_private; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); struct intel_plane *intel_plane = to_intel_plane(plane); - struct intel_framebuffer *intel_fb; - struct drm_i915_gem_object *obj, *old_obj; + struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb); + struct drm_i915_gem_object *obj = intel_fb->obj; + struct drm_i915_gem_object *old_obj = intel_plane->obj; int pipe = intel_plane->pipe; enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv, pipe); int ret = 0; - int x = src_x >> 16, y = src_y >> 16; int primary_w = crtc->mode.hdisplay, primary_h = crtc->mode.vdisplay; bool disable_primary = false; - - intel_fb = to_intel_framebuffer(fb); - obj = intel_fb->obj; - - old_obj = intel_plane->obj; - - src_w = src_w >> 16; - src_h = src_h >> 16; - - /* Pipe must be running... */ - if (!(I915_READ(PIPECONF(cpu_transcoder)) & PIPECONF_ENABLE)) - return -EINVAL; - - if (crtc_x >= primary_w || crtc_y >= primary_h) - return -EINVAL; + bool visible; + int hscale, vscale; + int cpp = drm_format_plane_cpp(fb->pixel_format, 0); + struct drm_region src = { + .x1 = src_x, + .x2 = src_x + src_w, + .y1 = src_y, + .y2 = src_y + src_h, + }; + struct drm_region dst = { + .x1 = crtc_x, + .x2 = crtc_x + crtc_w, + .y1 = crtc_y, + .y2 = crtc_y + crtc_h, + }; + const struct drm_region clip = { + .x2 = crtc->mode.hdisplay, + .y2 = crtc->mode.vdisplay, + };
/* Don't modify another pipe's plane */ if (intel_plane->pipe != intel_crtc->pipe) return -EINVAL;
+ if (fb->width < 3 || fb->height < 3 || fb->pitches[0] > 16384) + return -EINVAL; + + /* + * We may not have a scaler, eg. HSW does not have it any more + */ + if (!intel_plane->can_scale && (((uint64_t) crtc_w << 16) != src_w || + ((uint64_t) crtc_h << 16) != src_h)) + return -EINVAL; + + /* + * FIXME the following code does a bunch of fuzzy adjustments to the + * coordinates and sizes. We probably need some way to decide whether + * strict checking should be done instead. + */ + hscale = drm_calc_hscale(&src, &dst, 1, intel_plane->max_downscale << 16); + vscale = drm_calc_vscale(&src, &dst, 1, intel_plane->max_downscale << 16); + + visible = drm_region_clip_scaled(&src, &dst, &clip, hscale, vscale); + + crtc_x = dst.x1; + crtc_y = dst.y1; + crtc_w = drm_region_width(&dst); + crtc_h = drm_region_height(&dst); + + /* HW doesn't seem to like smaller sprite, even when scaling */ + if (crtc_w < 3 || crtc_h < 3) + visible = false; + /* Sprite planes can be linear or x-tiled surfaces */ switch (obj->tiling_mode) { case I915_TILING_NONE: @@ -459,43 +504,47 @@ intel_update_plane(struct drm_plane *plane, struct drm_crtc *crtc, }
/* - * Clamp the width & height into the visible area. Note we don't - * try to scale the source if part of the visible region is offscreen. - * The caller must handle that by adjusting source offset and size. + * Hardware doesn't handle subpixel coordinates. + * Round to nearest (macro)pixel boundary. */ - if ((crtc_x < 0) && ((crtc_x + crtc_w) > 0)) { - crtc_w += crtc_x; - crtc_x = 0; + if (format_is_yuv(fb->pixel_format)) { + src_x = ((src.x1 + 0x10000) >> 17) << 1; + src_w = (((src.x2 + 0x10000) >> 17) << 1) - src_x; + } else { + src_x = (src.x1 + 0x8000) >> 16; + src_w = ((src.x2 + 0x8000) >> 16) - src_x; } - if ((crtc_x + crtc_w) <= 0) /* Nothing to display */ - goto out; - if ((crtc_x + crtc_w) > primary_w) - crtc_w = primary_w - crtc_x; + src_y = (src.y1 + 0x8000) >> 16; + src_h = ((src.y2 + 0x8000) >> 16) - src_y;
- if ((crtc_y < 0) && ((crtc_y + crtc_h) > 0)) { - crtc_h += crtc_y; - crtc_y = 0; - } - if ((crtc_y + crtc_h) <= 0) /* Nothing to display */ - goto out; - if (crtc_y + crtc_h > primary_h) - crtc_h = primary_h - crtc_y; + /* Account for minimum source size when scaling */ + if (visible && (src_w != crtc_w || src_h != crtc_h)) { + unsigned int min_w = format_is_yuv(fb->pixel_format) ? 4 : 3;
- if (!crtc_w || !crtc_h) /* Again, nothing to display */ - goto out; + if (src_w < min_w) { + src_w = min_w; + if (src_x > fb->width - src_w) + src_x = fb->width - src_w; + }
- /* - * We may not have a scaler, eg. HSW does not have it any more - */ - if (!intel_plane->can_scale && (crtc_w != src_w || crtc_h != src_h)) - return -EINVAL; + /* FIXME interlacing */ + if (src_h < 3) { + src_h = 3; + if (src_y > fb->height - src_h) + src_y = fb->height - src_h; + } + }
- /* - * We can take a larger source and scale it down, but - * only so much... 16x is the max on SNB. - */ - if (((src_w * src_h) / (crtc_w * crtc_h)) > intel_plane->max_downscale) - return -EINVAL; + /* Check size restrictions when scaling */ + if (visible && (src_w != crtc_w || src_h != crtc_h)) { + if (src_w > 2048 || src_h > 2048 || + src_w * cpp > 4096 - 64 || fb->pitches[0] > 4096) + return -EINVAL; + } + + /* Pipe must be running... */ + if (!(I915_READ(PIPECONF(pipe)) & PIPECONF_ENABLE)) + return 0;
/* * If the sprite is completely covering the primary plane, @@ -520,11 +569,14 @@ intel_update_plane(struct drm_plane *plane, struct drm_crtc *crtc, if (!disable_primary) intel_enable_primary(crtc);
- intel_plane->update_plane(plane, fb, obj, crtc_x, crtc_y, - crtc_w, crtc_h, x, y, src_w, src_h); + if (visible) { + intel_plane->update_plane(plane, fb, obj, crtc_x, crtc_y, + crtc_w, crtc_h, src_x, src_y, src_w, src_h);
- if (disable_primary) - intel_disable_primary(crtc); + if (disable_primary) + intel_disable_primary(crtc); + } else + intel_plane->disable_plane(plane);
/* Unpin old obj after new one is active to avoid ugliness */ if (old_obj) { @@ -544,7 +596,6 @@ intel_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
out_unlock: mutex_unlock(&dev->struct_mutex); -out: return ret; }