From 5d32bcd0a74c791c7049817d42dd3645d6c63faf Mon Sep 17 00:00:00 2001 From: Imre Deak Date: Thu, 25 Mar 2021 23:47:58 +0200 Subject: [PATCH] drm/i915/intel_fb: Factor out calc_plane_normal_size() MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Factor out to a new function the logic to calculate an FB plane's normal-view size. Instead of using intel_remapped_plane_info, which is related only to remapping, add a helper to get the tile pitch and rows for an FB plane, so these helpers can be used both by the normal size calculation and the remapping code. Also add a new fb_plane_view_dims struct in which we can pass around the view (either FB plane or plane source) and tile dimensions conveniently to functions calculating further view parameters. v2: - Add back the +1 tile adjustment for x!=0 in calc_plane_normal_size(). (Ville) - s/pages/tiles/ in calc_plane_normal_size(). (Ville) - Add a helper for the plane view width calculation. (Ville) - Return tiles as unsigned int from calc_plane_normal_size(). Cc: Ville Syrjälä Signed-off-by: Imre Deak Reviewed-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20210325214808.2071517-16-imre.deak@intel.com --- drivers/gpu/drm/i915/display/intel_fb.c | 97 ++++++++++++++++++++++++++------- 1 file changed, 76 insertions(+), 21 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_fb.c b/drivers/gpu/drm/i915/display/intel_fb.c index 1400a31f0dd6..6f8206769c3d 100644 --- a/drivers/gpu/drm/i915/display/intel_fb.c +++ b/drivers/gpu/drm/i915/display/intel_fb.c @@ -632,6 +632,74 @@ static u32 setup_fb_rotation(int plane, const struct intel_remapped_plane_info * return plane_info->width * plane_info->height; } +struct fb_plane_view_dims { + unsigned int width, height; + unsigned int tile_width, tile_height; +}; + +static void init_plane_view_dims(const struct intel_framebuffer *fb, int color_plane, + unsigned int width, unsigned int height, + struct fb_plane_view_dims *dims) +{ + dims->width = width; + dims->height = height; + + intel_tile_dims(&fb->base, color_plane, &dims->tile_width, &dims->tile_height); +} + +static unsigned int +plane_view_stride_tiles(const struct intel_framebuffer *fb, int color_plane, + const struct fb_plane_view_dims *dims) +{ + return DIV_ROUND_UP(fb->base.pitches[color_plane], + dims->tile_width * fb->base.format->cpp[color_plane]); +} + +static unsigned int +plane_view_width_tiles(const struct intel_framebuffer *fb, int color_plane, + const struct fb_plane_view_dims *dims, + int x) +{ + return DIV_ROUND_UP(x + dims->width, dims->tile_width); +} + +static unsigned int +plane_view_height_tiles(const struct intel_framebuffer *fb, int color_plane, + const struct fb_plane_view_dims *dims, + int y) +{ + return DIV_ROUND_UP(y + dims->height, dims->tile_height); +} + +/* Return number of tiles @color_plane needs. */ +static unsigned int +calc_plane_normal_size(const struct intel_framebuffer *fb, int color_plane, + const struct fb_plane_view_dims *dims, + int x, int y) +{ + struct drm_i915_private *i915 = to_i915(fb->base.dev); + unsigned int tiles; + + if (is_surface_linear(&fb->base, color_plane)) { + unsigned int size; + + size = (y + dims->height) * fb->base.pitches[color_plane] + + x * fb->base.format->cpp[color_plane]; + tiles = DIV_ROUND_UP(size, intel_tile_size(i915)); + } else { + tiles = plane_view_stride_tiles(fb, color_plane, dims) * + plane_view_height_tiles(fb, color_plane, dims, y); + /* + * If the plane isn't horizontally tile aligned, + * we need one more tile. + */ + if (x != 0) + tiles++; + } + + return tiles; +} + int intel_fill_fb_info(struct drm_i915_private *i915, struct drm_framebuffer *fb) { struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb); @@ -642,6 +710,7 @@ int intel_fill_fb_info(struct drm_i915_private *i915, struct drm_framebuffer *fb unsigned int tile_size = intel_tile_size(i915); for (i = 0; i < num_planes; i++) { + struct fb_plane_view_dims view_dims; unsigned int width, height; unsigned int cpp, size; u32 offset; @@ -667,6 +736,8 @@ int intel_fill_fb_info(struct drm_i915_private *i915, struct drm_framebuffer *fb if (ret) return ret; + init_plane_view_dims(intel_fb, i, width, height, &view_dims); + /* * First pixel of the framebuffer from * the start of the normal gtt mapping. @@ -678,38 +749,22 @@ int intel_fill_fb_info(struct drm_i915_private *i915, struct drm_framebuffer *fb if (!is_surface_linear(fb, i)) { struct intel_remapped_plane_info plane_info; - unsigned int tile_width, tile_height; - - intel_tile_dims(fb, i, &tile_width, &tile_height); plane_info.offset = offset; - plane_info.stride = DIV_ROUND_UP(fb->pitches[i], - tile_width * cpp); - plane_info.width = DIV_ROUND_UP(x + width, tile_width); - plane_info.height = DIV_ROUND_UP(y + height, - tile_height); - - /* how many tiles does this plane need */ - size = plane_info.stride * plane_info.height; - /* - * If the plane isn't horizontally tile aligned, - * we need one more tile. - */ - if (x != 0) - size++; + plane_info.stride = plane_view_stride_tiles(intel_fb, i, &view_dims); + plane_info.width = plane_view_width_tiles(intel_fb, i, &view_dims, x); + plane_info.height = plane_view_height_tiles(intel_fb, i, &view_dims, y); gtt_offset_rotated += setup_fb_rotation(i, &plane_info, gtt_offset_rotated, x, y, width, height, tile_size, - tile_width, tile_height, + view_dims.tile_width, view_dims.tile_height, fb); - } else { - size = DIV_ROUND_UP((y + height) * fb->pitches[i] + - x * cpp, tile_size); } + size = calc_plane_normal_size(intel_fb, i, &view_dims, x, y); /* how many tiles in total needed in the bo */ max_size = max(max_size, offset + size); } -- 2.11.0