From dabc8fbdb2e159d27b5f02ac428fa5788c2c4c2a Mon Sep 17 00:00:00 2001 From: Dom Cobley Date: Mon, 14 Mar 2022 17:56:10 +0000 Subject: [PATCH] vc4/drm: vc4_plane: Keep fractional source coords inside state Signed-off-by: Dom Cobley --- drivers/gpu/drm/vc4/vc4_drv.h | 2 +- drivers/gpu/drm/vc4/vc4_plane.c | 68 ++++++++++++++++----------------- 2 files changed, 34 insertions(+), 36 deletions(-) --- a/drivers/gpu/drm/vc4/vc4_drv.h +++ b/drivers/gpu/drm/vc4/vc4_drv.h @@ -384,7 +384,7 @@ struct vc4_plane_state { /* Clipped coordinates of the plane on the display. */ int crtc_x, crtc_y, crtc_w, crtc_h; - /* Clipped area being scanned from in the FB. */ + /* Clipped area being scanned from in the FB in u16.16 format */ u32 src_x, src_y; u32 src_w[2], src_h[2]; --- a/drivers/gpu/drm/vc4/vc4_plane.c +++ b/drivers/gpu/drm/vc4/vc4_plane.c @@ -183,9 +183,9 @@ static const struct hvs_format *vc4_get_ static enum vc4_scaling_mode vc4_get_scaling_mode(u32 src, u32 dst) { - if (dst == src) + if (dst == src >> 16) return VC4_SCALING_NONE; - if (3 * dst >= 2 * src) + if (3 * dst >= 2 * (src >> 16)) return VC4_SCALING_PPF; else return VC4_SCALING_TPZ; @@ -394,15 +394,10 @@ static int vc4_plane_setup_clipping_and_ vc4_state->offsets[i] = bo->dma_addr + fb->offsets[i]; } - /* - * We don't support subpixel source positioning for scaling, - * but fractional coordinates can be generated by clipping - * so just round for now - */ - vc4_state->src_x = DIV_ROUND_CLOSEST(state->src.x1, 1 << 16); - vc4_state->src_y = DIV_ROUND_CLOSEST(state->src.y1, 1 << 16); - vc4_state->src_w[0] = DIV_ROUND_CLOSEST(state->src.x2, 1 << 16) - vc4_state->src_x; - vc4_state->src_h[0] = DIV_ROUND_CLOSEST(state->src.y2, 1 << 16) - vc4_state->src_y; + vc4_state->src_x = state->src.x1; + vc4_state->src_y = state->src.y1; + vc4_state->src_w[0] = state->src.x2 - vc4_state->src_x; + vc4_state->src_h[0] = state->src.y2 - vc4_state->src_y; vc4_state->crtc_x = state->dst.x1; vc4_state->crtc_y = state->dst.y1; @@ -455,7 +450,7 @@ static void vc4_write_tpz(struct vc4_pla { u32 scale, recip; - scale = (1 << 16) * src / dst; + scale = src / dst; /* The specs note that while the reciprocal would be defined * as (1<<32)/scale, ~0 is close enough. @@ -501,7 +496,7 @@ static u32 vc4_lbm_size(struct drm_plane if (vc4_state->x_scaling[0] == VC4_SCALING_TPZ) pix_per_line = vc4_state->crtc_w; else - pix_per_line = vc4_state->src_w[0]; + pix_per_line = vc4_state->src_w[0] >> 16; if (!vc4_state->is_yuv) { if (vc4_state->y_scaling[0] == VC4_SCALING_TPZ) @@ -592,7 +587,8 @@ static void vc4_plane_calc_load(struct d for (i = 0; i < fb->format->num_planes; i++) { /* Even if the bandwidth/plane required for a single frame is * - * vc4_state->src_w[i] * vc4_state->src_h[i] * cpp * vrefresh + * (vc4_state->src_w[i] >> 16) * (vc4_state->src_h[i] >> 16) * + * cpp * vrefresh * * when downscaling, we have to read more pixels per line in * the time frame reserved for a single line, so the bandwidth @@ -601,11 +597,11 @@ static void vc4_plane_calc_load(struct d * load by this number. We're likely over-estimating the read * demand, but that's better than under-estimating it. */ - vscale_factor = DIV_ROUND_UP(vc4_state->src_h[i], + vscale_factor = DIV_ROUND_UP(vc4_state->src_h[i] >> 16, vc4_state->crtc_h); - vc4_state->membus_load += vc4_state->src_w[i] * - vc4_state->src_h[i] * vscale_factor * - fb->format->cpp[i]; + vc4_state->membus_load += (vc4_state->src_w[i] >> 16) * + (vc4_state->src_h[i] >> 16) * + vscale_factor * fb->format->cpp[i]; vc4_state->hvs_load += vc4_state->crtc_h * vc4_state->crtc_w; } @@ -758,7 +754,8 @@ static int vc4_plane_mode_set(struct drm bool mix_plane_alpha; bool covers_screen; u32 scl0, scl1, pitch0; - u32 tiling, src_y; + u32 tiling, src_x, src_y; + u32 width, height; u32 hvs_format = format->hvs; unsigned int rotation; int ret, i; @@ -770,6 +767,9 @@ static int vc4_plane_mode_set(struct drm if (ret) return ret; + width = vc4_state->src_w[0] >> 16; + height = vc4_state->src_h[0] >> 16; + /* SCL1 is used for Cb/Cr scaling of planar formats. For RGB * and 4:4:4, scl1 should be set to scl0 so both channels of * the scaler do the same thing. For YUV, the Y plane needs @@ -790,9 +790,11 @@ static int vc4_plane_mode_set(struct drm DRM_MODE_REFLECT_Y); /* We must point to the last line when Y reflection is enabled. */ - src_y = vc4_state->src_y; + src_y = vc4_state->src_y >> 16; if (rotation & DRM_MODE_REFLECT_Y) - src_y += vc4_state->src_h[0] - 1; + src_y += height - 1; + + src_x = vc4_state->src_x >> 16; switch (base_format_mod) { case DRM_FORMAT_MOD_LINEAR: @@ -807,7 +809,7 @@ static int vc4_plane_mode_set(struct drm (i ? v_subsample : 1) * fb->pitches[i]; - vc4_state->offsets[i] += vc4_state->src_x / + vc4_state->offsets[i] += src_x / (i ? h_subsample : 1) * fb->format->cpp[i]; } @@ -830,7 +832,7 @@ static int vc4_plane_mode_set(struct drm * pitch * tile_h == tile_size * tiles_per_row */ u32 tiles_w = fb->pitches[0] >> (tile_size_shift - tile_h_shift); - u32 tiles_l = vc4_state->src_x >> tile_w_shift; + u32 tiles_l = src_x >> tile_w_shift; u32 tiles_r = tiles_w - tiles_l; u32 tiles_t = src_y >> tile_h_shift; /* Intra-tile offsets, which modify the base address (the @@ -840,7 +842,7 @@ static int vc4_plane_mode_set(struct drm u32 tile_y = (src_y >> 4) & 1; u32 subtile_y = (src_y >> 2) & 3; u32 utile_y = src_y & 3; - u32 x_off = vc4_state->src_x & tile_w_mask; + u32 x_off = src_x & tile_w_mask; u32 y_off = src_y & tile_h_mask; /* When Y reflection is requested we must set the @@ -936,7 +938,7 @@ static int vc4_plane_mode_set(struct drm * of the 12-pixels in that 128-bit word is the * first pixel to be used */ - u32 remaining_pixels = vc4_state->src_x % 96; + u32 remaining_pixels = src_x % 96; u32 aligned = remaining_pixels / 12; u32 last_bits = remaining_pixels % 12; @@ -958,12 +960,12 @@ static int vc4_plane_mode_set(struct drm return -EINVAL; } pix_per_tile = tile_w / fb->format->cpp[0]; - x_off = (vc4_state->src_x % pix_per_tile) / + x_off = (src_x % pix_per_tile) / (i ? h_subsample : 1) * fb->format->cpp[i]; } - tile = vc4_state->src_x / pix_per_tile; + tile = src_x / pix_per_tile; vc4_state->offsets[i] += param * tile_w * tile; vc4_state->offsets[i] += src_y / @@ -1024,10 +1026,8 @@ static int vc4_plane_mode_set(struct drm vc4_dlist_write(vc4_state, (mix_plane_alpha ? SCALER_POS2_ALPHA_MIX : 0) | vc4_hvs4_get_alpha_blend_mode(state) | - VC4_SET_FIELD(vc4_state->src_w[0], - SCALER_POS2_WIDTH) | - VC4_SET_FIELD(vc4_state->src_h[0], - SCALER_POS2_HEIGHT)); + VC4_SET_FIELD(width, SCALER_POS2_WIDTH) | + VC4_SET_FIELD(height, SCALER_POS2_HEIGHT)); /* Position Word 3: Context. Written by the HVS. */ vc4_dlist_write(vc4_state, 0xc0c0c0c0); @@ -1085,10 +1085,8 @@ static int vc4_plane_mode_set(struct drm /* Position Word 2: Source Image Size */ vc4_state->pos2_offset = vc4_state->dlist_count; vc4_dlist_write(vc4_state, - VC4_SET_FIELD(vc4_state->src_w[0], - SCALER5_POS2_WIDTH) | - VC4_SET_FIELD(vc4_state->src_h[0], - SCALER5_POS2_HEIGHT)); + VC4_SET_FIELD(width, SCALER5_POS2_WIDTH) | + VC4_SET_FIELD(height, SCALER5_POS2_HEIGHT)); /* Position Word 3: Context. Written by the HVS. */ vc4_dlist_write(vc4_state, 0xc0c0c0c0);