Re: [PATCH v3 08/18] drm/i915: Pass 90/270 vs. 0/180 rotation info for intel_gen4_compute_page_offset()

Daniel Vetter
2016-01-25T17:30:10Z

On Wed, Jan 20, 2016 at 09:05:29PM +0200, ville.syrjala@linux.intel.com wrote:
> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
>
> The page aligned surface address calculation needs to know which way
> things are rotated. The contract now says that the caller must pass the
> rotate x/y coordinates, as well as the tile_height aligned stride in
> the tile_height direction. This will make it fairly simple to deal with
> 90/270 degree rotation on SKL+ where we have to deal with the rotated
> view into the GTT.
>
> v2: Pass rotation instead of bool even thoughwe only care about 0/180 vs. 90/270
> v3: Introduce intel_tile_dims(), and don't mix up different units so much
>
> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> (v2)
> ---
> drivers/gpu/drm/i915/intel_display.c | 66 +++++++++++++++++++++++++-----------
> drivers/gpu/drm/i915/intel_drv.h | 3 +-
> drivers/gpu/drm/i915/intel_sprite.c | 18 +++++-----
> 3 files changed, 59 insertions(+), 28 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index cfd52ea68e34..bda3224021b2 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -2269,6 +2269,18 @@ unsigned int intel_tile_height(const struct drm_i915_private *dev_priv,
> intel_tile_width(dev_priv, fb_modifier, cpp);
> }
>
> +/* Return the tile dimensions in pixel units */
> +static void intel_tile_dims(const struct drm_i915_private *dev_priv,
> + unsigned int *tile_width,
> + unsigned int *tile_height,
> + uint64_t fb_modifier,
> + unsigned int cpp)
> +{
> + *tile_width = intel_tile_width(dev_priv, fb_modifier, cpp);
> + *tile_height = intel_tile_size(dev_priv) / *tile_width;
> + *tile_width /= cpp;

Seems like my suggestion to use tile_width in cpp wasn't that awesome, at
least we still have a big confusion right here. Not sure what to do,
especially since these kind of changes are super-painful to review. Could
we perhaps go back to the old versions and untangle this mess afterwards?
Iirc I've follow-up with r-b tags to all patches in the old series for
that approach.

No idea really what would be best here ...
-Daniel

> +}
> +
> unsigned int
> intel_fb_align_height(struct drm_device *dev, unsigned int height,
> uint32_t pixel_format, uint64_t fb_modifier)
> @@ -2306,19 +2318,19 @@ intel_fill_fb_ggtt_view(struct i915_ggtt_view *view, struct drm_framebuffer *fb,
> tile_size = intel_tile_size(dev_priv);
>
> cpp = drm_format_plane_cpp(fb->pixel_format, 0);
> - tile_width = intel_tile_width(dev_priv, fb->modifier[0], cpp);
> - tile_height = tile_size / tile_width;
> + intel_tile_dims(dev_priv, &tile_width, &tile_height,
> + fb->modifier[0], cpp);
>
> - info->width_pages = DIV_ROUND_UP(fb->pitches[0], tile_width);
> + info->width_pages = DIV_ROUND_UP(fb->pitches[0], tile_width * cpp);
> info->height_pages = DIV_ROUND_UP(fb->height, tile_height);
> info->size = info->width_pages * info->height_pages * tile_size;
>
> if (info->pixel_format == DRM_FORMAT_NV12) {
> cpp = drm_format_plane_cpp(fb->pixel_format, 1);
> - tile_width = intel_tile_width(dev_priv, fb->modifier[1], cpp);
> - tile_height = tile_size / tile_width;
> + intel_tile_dims(dev_priv, &tile_width, &tile_height,
> + fb->modifier[1], cpp);
>
> - info->width_pages_uv = DIV_ROUND_UP(fb->pitches[1], tile_width);
> + info->width_pages_uv = DIV_ROUND_UP(fb->pitches[1], tile_width * cpp);
> info->height_pages_uv = DIV_ROUND_UP(fb->height / 2, tile_height);
> info->size_uv = info->width_pages_uv * info->height_pages_uv * tile_size;
> }
> @@ -2446,29 +2458,43 @@ static void intel_unpin_fb_obj(struct drm_framebuffer *fb,
> i915_gem_object_unpin_from_display_plane(obj, &view);
> }
>
> -/* Computes the linear offset to the base tile and adjusts x, y. bytes per pixel
> - * is assumed to be a power-of-two. */
> +/*
> + * Computes the linear offset to the base tile and adjusts
> + * x, y. bytes per pixel is assumed to be a power-of-two.
> + *
> + * In the 90/270 rotated case, x and y are assumed
> + * to be already rotated to match the rotated GTT view, and
> + * pitch is the tile_height aligned framebuffer height.
> + */
> u32 intel_compute_tile_offset(struct drm_i915_private *dev_priv,
> int *x, int *y,
> uint64_t fb_modifier,
> unsigned int cpp,
> - unsigned int pitch)
> + unsigned int pitch,
> + unsigned int rotation)
> {
> if (fb_modifier != DRM_FORMAT_MOD_NONE) {
> unsigned int tile_size, tile_width, tile_height;
> - unsigned int tile_rows, tiles;
> + unsigned int tile_rows, tiles, pitch_tiles;
>
> tile_size = intel_tile_size(dev_priv);
> - tile_width = intel_tile_width(dev_priv, fb_modifier, cpp);
> - tile_height = tile_size / tile_width;
> + intel_tile_dims(dev_priv, &tile_width, &tile_height,
> + fb_modifier, cpp);
> +
> + if (intel_rotation_90_or_270(rotation)) {
> + pitch_tiles = pitch / tile_height;
> + swap(tile_width, tile_height);
> + } else {
> + pitch_tiles = pitch / (tile_width * cpp);
> + }
>
> tile_rows = *y / tile_height;
> *y %= tile_height;
>
> - tiles = *x / (tile_width/cpp);
> - *x %= tile_width/cpp;
> + tiles = *x / tile_width;
> + *x %= tile_width;
>
> - return tile_rows * pitch * tile_height + tiles * tile_size;
> + return (tile_rows * pitch_tiles + tiles) * tile_size;
> } else {
> unsigned int alignment = intel_linear_alignment(dev_priv) - 1;
> unsigned int offset;
> @@ -2709,6 +2735,7 @@ static void i9xx_update_primary_plane(struct drm_plane *primary,
> u32 linear_offset;
> u32 dspcntr;
> i915_reg_t reg = DSPCNTR(plane);
> + unsigned int rotation = plane_state->base.rotation;
> int cpp = drm_format_plane_cpp(fb->pixel_format, 0);
> int x = plane_state->src.x1 >> 16;
> int y = plane_state->src.y1 >> 16;
> @@ -2775,13 +2802,13 @@ static void i9xx_update_primary_plane(struct drm_plane *primary,
> intel_crtc->dspaddr_offset =
> intel_compute_tile_offset(dev_priv, &x, &y,
> fb->modifier[0], cpp,
> - fb->pitches[0]);
> + fb->pitches[0], rotation);
> linear_offset -= intel_crtc->dspaddr_offset;
> } else {
> intel_crtc->dspaddr_offset = linear_offset;
> }
>
> - if (plane_state->base.rotation == BIT(DRM_ROTATE_180)) {
> + if (rotation == BIT(DRM_ROTATE_180)) {
> dspcntr |= DISPPLANE_ROTATE_180;
>
> x += (crtc_state->pipe_src_w - 1);
> @@ -2839,6 +2866,7 @@ static void ironlake_update_primary_plane(struct drm_plane *primary,
> u32 linear_offset;
> u32 dspcntr;
> i915_reg_t reg = DSPCNTR(plane);
> + unsigned int rotation = plane_state->base.rotation;
> int cpp = drm_format_plane_cpp(fb->pixel_format, 0);
> int x = plane_state->src.x1 >> 16;
> int y = plane_state->src.y1 >> 16;
> @@ -2882,9 +2910,9 @@ static void ironlake_update_primary_plane(struct drm_plane *primary,
> intel_crtc->dspaddr_offset =
> intel_compute_tile_offset(dev_priv, &x, &y,
> fb->modifier[0], cpp,
> - fb->pitches[0]);
> + fb->pitches[0], rotation);
> linear_offset -= intel_crtc->dspaddr_offset;
> - if (plane_state->base.rotation == BIT(DRM_ROTATE_180)) {
> + if (rotation == BIT(DRM_ROTATE_180)) {
> dspcntr |= DISPPLANE_ROTATE_180;
>
> if (!IS_HASWELL(dev) && !IS_BROADWELL(dev)) {
> diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> index f620023ed134..223693dbfe7c 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -1176,7 +1176,8 @@ u32 intel_compute_tile_offset(struct drm_i915_private *dev_priv,
> int *x, int *y,
> uint64_t fb_modifier,
> unsigned int cpp,
> - unsigned int pitch);
> + unsigned int pitch,
> + unsigned int rotation);
> void intel_prepare_reset(struct drm_device *dev);
> void intel_finish_reset(struct drm_device *dev);
> void hsw_enable_pc8(struct drm_i915_private *dev_priv);
> diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
> index a2582c455b36..7dc2b8b2a4ac 100644
> --- a/drivers/gpu/drm/i915/intel_sprite.c
> +++ b/drivers/gpu/drm/i915/intel_sprite.c
> @@ -193,7 +193,7 @@ skl_update_plane(struct drm_plane *drm_plane,
> const struct drm_intel_sprite_colorkey *key = &plane_state->ckey;
> u32 surf_addr;
> u32 tile_height, plane_offset, plane_size;
> - unsigned int rotation;
> + unsigned int rotation = plane_state->base.rotation;
> int x_offset, y_offset;
> int crtc_x = plane_state->dst.x1;
> int crtc_y = plane_state->dst.y1;
> @@ -213,7 +213,6 @@ skl_update_plane(struct drm_plane *drm_plane,
> plane_ctl |= skl_plane_ctl_format(fb->pixel_format);
> plane_ctl |= skl_plane_ctl_tiling(fb->modifier[0]);
>
> - rotation = plane_state->base.rotation;
> plane_ctl |= skl_plane_ctl_rotation(rotation);
>
> stride_div = intel_fb_stride_alignment(dev_priv, fb->modifier[0],
> @@ -351,6 +350,7 @@ vlv_update_plane(struct drm_plane *dplane,
> int plane = intel_plane->plane;
> u32 sprctl;
> u32 sprsurf_offset, linear_offset;
> + unsigned int rotation = dplane->state->rotation;
> int cpp = drm_format_plane_cpp(fb->pixel_format, 0);
> const struct drm_intel_sprite_colorkey *key = &plane_state->ckey;
> int crtc_x = plane_state->dst.x1;
> @@ -425,10 +425,10 @@ vlv_update_plane(struct drm_plane *dplane,
> linear_offset = y * fb->pitches[0] + x * cpp;
> sprsurf_offset = intel_compute_tile_offset(dev_priv, &x, &y,
> fb->modifier[0], cpp,
> - fb->pitches[0]);
> + fb->pitches[0], rotation);
> linear_offset -= sprsurf_offset;
>
> - if (plane_state->base.rotation == BIT(DRM_ROTATE_180)) {
> + if (rotation == BIT(DRM_ROTATE_180)) {
> sprctl |= SP_ROTATE_180;
>
> x += src_w;
> @@ -493,6 +493,7 @@ ivb_update_plane(struct drm_plane *plane,
> enum pipe pipe = intel_plane->pipe;
> u32 sprctl, sprscale = 0;
> u32 sprsurf_offset, linear_offset;
> + unsigned int rotation = plane_state->base.rotation;
> int cpp = drm_format_plane_cpp(fb->pixel_format, 0);
> const struct drm_intel_sprite_colorkey *key = &plane_state->ckey;
> int crtc_x = plane_state->dst.x1;
> @@ -558,10 +559,10 @@ ivb_update_plane(struct drm_plane *plane,
> linear_offset = y * fb->pitches[0] + x * cpp;
> sprsurf_offset = intel_compute_tile_offset(dev_priv, &x, &y,
> fb->modifier[0], cpp,
> - fb->pitches[0]);
> + fb->pitches[0], rotation);
> linear_offset -= sprsurf_offset;
>
> - if (plane_state->base.rotation == BIT(DRM_ROTATE_180)) {
> + if (rotation == BIT(DRM_ROTATE_180)) {
> sprctl |= SPRITE_ROTATE_180;
>
> /* HSW and BDW does this automagically in hardware */
> @@ -634,6 +635,7 @@ ilk_update_plane(struct drm_plane *plane,
> int pipe = intel_plane->pipe;
> u32 dvscntr, dvsscale;
> u32 dvssurf_offset, linear_offset;
> + unsigned int rotation = plane_state->base.rotation;
> int cpp = drm_format_plane_cpp(fb->pixel_format, 0);
> const struct drm_intel_sprite_colorkey *key = &plane_state->ckey;
> int crtc_x = plane_state->dst.x1;
> @@ -695,10 +697,10 @@ ilk_update_plane(struct drm_plane *plane,
> linear_offset = y * fb->pitches[0] + x * cpp;
> dvssurf_offset = intel_compute_tile_offset(dev_priv, &x, &y,
> fb->modifier[0], cpp,
> - fb->pitches[0]);
> + fb->pitches[0], rotation);
> linear_offset -= dvssurf_offset;
>
> - if (plane_state->base.rotation == BIT(DRM_ROTATE_180)) {
> + if (rotation == BIT(DRM_ROTATE_180)) {
> dvscntr |= DVS_ROTATE_180;
>
> x += src_w;
> --
> 2.4.10
>
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--
Daniel Vetter
Software Engineer, Intel Corporation