summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/i915/display/intel_fb.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_fb.c')
-rw-r--r--drivers/gpu/drm/i915/display/intel_fb.c962
1 files changed, 962 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_fb.c b/drivers/gpu/drm/i915/display/intel_fb.c
new file mode 100644
index 000000000000..fca41ac5b8e1
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_fb.c
@@ -0,0 +1,962 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2021 Intel Corporation
+ */
+
+#include <drm/drm_framebuffer.h>
+
+#include "intel_display.h"
+#include "intel_display_types.h"
+#include "intel_fb.h"
+
+#define check_array_bounds(i915, a, i) drm_WARN_ON(&(i915)->drm, (i) >= ARRAY_SIZE(a))
+
+bool is_ccs_plane(const struct drm_framebuffer *fb, int plane)
+{
+ if (!is_ccs_modifier(fb->modifier))
+ return false;
+
+ return plane >= fb->format->num_planes / 2;
+}
+
+bool is_gen12_ccs_plane(const struct drm_framebuffer *fb, int plane)
+{
+ return is_gen12_ccs_modifier(fb->modifier) && is_ccs_plane(fb, plane);
+}
+
+bool is_gen12_ccs_cc_plane(const struct drm_framebuffer *fb, int plane)
+{
+ return fb->modifier == I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS_CC &&
+ plane == 2;
+}
+
+bool is_aux_plane(const struct drm_framebuffer *fb, int plane)
+{
+ if (is_ccs_modifier(fb->modifier))
+ return is_ccs_plane(fb, plane);
+
+ return plane == 1;
+}
+
+bool is_semiplanar_uv_plane(const struct drm_framebuffer *fb, int color_plane)
+{
+ return intel_format_info_is_yuv_semiplanar(fb->format, fb->modifier) &&
+ color_plane == 1;
+}
+
+bool is_surface_linear(const struct drm_framebuffer *fb, int color_plane)
+{
+ return fb->modifier == DRM_FORMAT_MOD_LINEAR ||
+ is_gen12_ccs_plane(fb, color_plane);
+}
+
+int main_to_ccs_plane(const struct drm_framebuffer *fb, int main_plane)
+{
+ drm_WARN_ON(fb->dev, !is_ccs_modifier(fb->modifier) ||
+ (main_plane && main_plane >= fb->format->num_planes / 2));
+
+ return fb->format->num_planes / 2 + main_plane;
+}
+
+int skl_ccs_to_main_plane(const struct drm_framebuffer *fb, int ccs_plane)
+{
+ drm_WARN_ON(fb->dev, !is_ccs_modifier(fb->modifier) ||
+ ccs_plane < fb->format->num_planes / 2);
+
+ if (is_gen12_ccs_cc_plane(fb, ccs_plane))
+ return 0;
+
+ return ccs_plane - fb->format->num_planes / 2;
+}
+
+int skl_main_to_aux_plane(const struct drm_framebuffer *fb, int main_plane)
+{
+ struct drm_i915_private *i915 = to_i915(fb->dev);
+
+ if (is_ccs_modifier(fb->modifier))
+ return main_to_ccs_plane(fb, main_plane);
+ else if (DISPLAY_VER(i915) < 11 &&
+ intel_format_info_is_yuv_semiplanar(fb->format, fb->modifier))
+ return 1;
+ else
+ return 0;
+}
+
+unsigned int intel_tile_size(const struct drm_i915_private *i915)
+{
+ return IS_DISPLAY_VER(i915, 2) ? 2048 : 4096;
+}
+
+unsigned int intel_tile_height(const struct drm_framebuffer *fb, int color_plane)
+{
+ if (is_gen12_ccs_plane(fb, color_plane))
+ return 1;
+
+ return intel_tile_size(to_i915(fb->dev)) /
+ intel_tile_width_bytes(fb, color_plane);
+}
+
+/* Return the tile dimensions in pixel units */
+static void intel_tile_dims(const struct drm_framebuffer *fb, int color_plane,
+ unsigned int *tile_width,
+ unsigned int *tile_height)
+{
+ unsigned int tile_width_bytes = intel_tile_width_bytes(fb, color_plane);
+ unsigned int cpp = fb->format->cpp[color_plane];
+
+ *tile_width = tile_width_bytes / cpp;
+ *tile_height = intel_tile_height(fb, color_plane);
+}
+
+unsigned int intel_tile_row_size(const struct drm_framebuffer *fb, int color_plane)
+{
+ unsigned int tile_width, tile_height;
+
+ intel_tile_dims(fb, color_plane, &tile_width, &tile_height);
+
+ return fb->pitches[color_plane] * tile_height;
+}
+
+unsigned int intel_cursor_alignment(const struct drm_i915_private *i915)
+{
+ if (IS_I830(i915))
+ return 16 * 1024;
+ else if (IS_I85X(i915))
+ return 256;
+ else if (IS_I845G(i915) || IS_I865G(i915))
+ return 32;
+ else
+ return 4 * 1024;
+}
+
+void intel_fb_plane_get_subsampling(int *hsub, int *vsub,
+ const struct drm_framebuffer *fb,
+ int color_plane)
+{
+ int main_plane;
+
+ if (color_plane == 0) {
+ *hsub = 1;
+ *vsub = 1;
+
+ return;
+ }
+
+ /*
+ * TODO: Deduct the subsampling from the char block for all CCS
+ * formats and planes.
+ */
+ if (!is_gen12_ccs_plane(fb, color_plane)) {
+ *hsub = fb->format->hsub;
+ *vsub = fb->format->vsub;
+
+ return;
+ }
+
+ main_plane = skl_ccs_to_main_plane(fb, color_plane);
+ *hsub = drm_format_info_block_width(fb->format, color_plane) /
+ drm_format_info_block_width(fb->format, main_plane);
+
+ /*
+ * The min stride check in the core framebuffer_check() function
+ * assumes that format->hsub applies to every plane except for the
+ * first plane. That's incorrect for the CCS AUX plane of the first
+ * plane, but for the above check to pass we must define the block
+ * width with that subsampling applied to it. Adjust the width here
+ * accordingly, so we can calculate the actual subsampling factor.
+ */
+ if (main_plane == 0)
+ *hsub *= fb->format->hsub;
+
+ *vsub = 32;
+}
+
+static void intel_fb_plane_dims(int *w, int *h, struct drm_framebuffer *fb, int color_plane)
+{
+ int main_plane = is_ccs_plane(fb, color_plane) ?
+ skl_ccs_to_main_plane(fb, color_plane) : 0;
+ int main_hsub, main_vsub;
+ int hsub, vsub;
+
+ intel_fb_plane_get_subsampling(&main_hsub, &main_vsub, fb, main_plane);
+ intel_fb_plane_get_subsampling(&hsub, &vsub, fb, color_plane);
+ *w = fb->width / main_hsub / hsub;
+ *h = fb->height / main_vsub / vsub;
+}
+
+static u32 intel_adjust_tile_offset(int *x, int *y,
+ unsigned int tile_width,
+ unsigned int tile_height,
+ unsigned int tile_size,
+ unsigned int pitch_tiles,
+ u32 old_offset,
+ u32 new_offset)
+{
+ unsigned int pitch_pixels = pitch_tiles * tile_width;
+ unsigned int tiles;
+
+ WARN_ON(old_offset & (tile_size - 1));
+ WARN_ON(new_offset & (tile_size - 1));
+ WARN_ON(new_offset > old_offset);
+
+ tiles = (old_offset - new_offset) / tile_size;
+
+ *y += tiles / pitch_tiles * tile_height;
+ *x += tiles % pitch_tiles * tile_width;
+
+ /* minimize x in case it got needlessly big */
+ *y += *x / pitch_pixels * tile_height;
+ *x %= pitch_pixels;
+
+ return new_offset;
+}
+
+static u32 intel_adjust_aligned_offset(int *x, int *y,
+ const struct drm_framebuffer *fb,
+ int color_plane,
+ unsigned int rotation,
+ unsigned int pitch,
+ u32 old_offset, u32 new_offset)
+{
+ struct drm_i915_private *i915 = to_i915(fb->dev);
+ unsigned int cpp = fb->format->cpp[color_plane];
+
+ drm_WARN_ON(&i915->drm, new_offset > old_offset);
+
+ if (!is_surface_linear(fb, color_plane)) {
+ unsigned int tile_size, tile_width, tile_height;
+ unsigned int pitch_tiles;
+
+ tile_size = intel_tile_size(i915);
+ intel_tile_dims(fb, color_plane, &tile_width, &tile_height);
+
+ if (drm_rotation_90_or_270(rotation)) {
+ pitch_tiles = pitch / tile_height;
+ swap(tile_width, tile_height);
+ } else {
+ pitch_tiles = pitch / (tile_width * cpp);
+ }
+
+ intel_adjust_tile_offset(x, y, tile_width, tile_height,
+ tile_size, pitch_tiles,
+ old_offset, new_offset);
+ } else {
+ old_offset += *y * pitch + *x * cpp;
+
+ *y = (old_offset - new_offset) / pitch;
+ *x = ((old_offset - new_offset) - *y * pitch) / cpp;
+ }
+
+ return new_offset;
+}
+
+/*
+ * Adjust the tile offset by moving the difference into
+ * the x/y offsets.
+ */
+u32 intel_plane_adjust_aligned_offset(int *x, int *y,
+ const struct intel_plane_state *state,
+ int color_plane,
+ u32 old_offset, u32 new_offset)
+{
+ return intel_adjust_aligned_offset(x, y, state->hw.fb, color_plane,
+ state->hw.rotation,
+ state->view.color_plane[color_plane].stride,
+ old_offset, new_offset);
+}
+
+/*
+ * Computes the aligned 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.
+ *
+ * This function is used when computing the derived information
+ * under intel_framebuffer, so using any of that information
+ * here is not allowed. Anything under drm_framebuffer can be
+ * used. This is why the user has to pass in the pitch since it
+ * is specified in the rotated orientation.
+ */
+static u32 intel_compute_aligned_offset(struct drm_i915_private *i915,
+ int *x, int *y,
+ const struct drm_framebuffer *fb,
+ int color_plane,
+ unsigned int pitch,
+ unsigned int rotation,
+ u32 alignment)
+{
+ unsigned int cpp = fb->format->cpp[color_plane];
+ u32 offset, offset_aligned;
+
+ if (!is_surface_linear(fb, color_plane)) {
+ unsigned int tile_size, tile_width, tile_height;
+ unsigned int tile_rows, tiles, pitch_tiles;
+
+ tile_size = intel_tile_size(i915);
+ intel_tile_dims(fb, color_plane, &tile_width, &tile_height);
+
+ if (drm_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;
+ *x %= tile_width;
+
+ offset = (tile_rows * pitch_tiles + tiles) * tile_size;
+
+ offset_aligned = offset;
+ if (alignment)
+ offset_aligned = rounddown(offset_aligned, alignment);
+
+ intel_adjust_tile_offset(x, y, tile_width, tile_height,
+ tile_size, pitch_tiles,
+ offset, offset_aligned);
+ } else {
+ offset = *y * pitch + *x * cpp;
+ offset_aligned = offset;
+ if (alignment) {
+ offset_aligned = rounddown(offset_aligned, alignment);
+ *y = (offset % alignment) / pitch;
+ *x = ((offset % alignment) - *y * pitch) / cpp;
+ } else {
+ *y = *x = 0;
+ }
+ }
+
+ return offset_aligned;
+}
+
+u32 intel_plane_compute_aligned_offset(int *x, int *y,
+ const struct intel_plane_state *state,
+ int color_plane)
+{
+ struct intel_plane *intel_plane = to_intel_plane(state->uapi.plane);
+ struct drm_i915_private *i915 = to_i915(intel_plane->base.dev);
+ const struct drm_framebuffer *fb = state->hw.fb;
+ unsigned int rotation = state->hw.rotation;
+ int pitch = state->view.color_plane[color_plane].stride;
+ u32 alignment;
+
+ if (intel_plane->id == PLANE_CURSOR)
+ alignment = intel_cursor_alignment(i915);
+ else
+ alignment = intel_surf_alignment(fb, color_plane);
+
+ return intel_compute_aligned_offset(i915, x, y, fb, color_plane,
+ pitch, rotation, alignment);
+}
+
+/* Convert the fb->offset[] into x/y offsets */
+static int intel_fb_offset_to_xy(int *x, int *y,
+ const struct drm_framebuffer *fb,
+ int color_plane)
+{
+ struct drm_i915_private *i915 = to_i915(fb->dev);
+ unsigned int height;
+ u32 alignment;
+
+ if (DISPLAY_VER(i915) >= 12 &&
+ is_semiplanar_uv_plane(fb, color_plane))
+ alignment = intel_tile_row_size(fb, color_plane);
+ else if (fb->modifier != DRM_FORMAT_MOD_LINEAR)
+ alignment = intel_tile_size(i915);
+ else
+ alignment = 0;
+
+ if (alignment != 0 && fb->offsets[color_plane] % alignment) {
+ drm_dbg_kms(&i915->drm,
+ "Misaligned offset 0x%08x for color plane %d\n",
+ fb->offsets[color_plane], color_plane);
+ return -EINVAL;
+ }
+
+ height = drm_framebuffer_plane_height(fb->height, fb, color_plane);
+ height = ALIGN(height, intel_tile_height(fb, color_plane));
+
+ /* Catch potential overflows early */
+ if (add_overflows_t(u32, mul_u32_u32(height, fb->pitches[color_plane]),
+ fb->offsets[color_plane])) {
+ drm_dbg_kms(&i915->drm,
+ "Bad offset 0x%08x or pitch %d for color plane %d\n",
+ fb->offsets[color_plane], fb->pitches[color_plane],
+ color_plane);
+ return -ERANGE;
+ }
+
+ *x = 0;
+ *y = 0;
+
+ intel_adjust_aligned_offset(x, y,
+ fb, color_plane, DRM_MODE_ROTATE_0,
+ fb->pitches[color_plane],
+ fb->offsets[color_plane], 0);
+
+ return 0;
+}
+
+static int intel_fb_check_ccs_xy(const struct drm_framebuffer *fb, int ccs_plane, int x, int y)
+{
+ struct drm_i915_private *i915 = to_i915(fb->dev);
+ const struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
+ int main_plane;
+ int hsub, vsub;
+ int tile_width, tile_height;
+ int ccs_x, ccs_y;
+ int main_x, main_y;
+
+ if (!is_ccs_plane(fb, ccs_plane) || is_gen12_ccs_cc_plane(fb, ccs_plane))
+ return 0;
+
+ intel_tile_dims(fb, ccs_plane, &tile_width, &tile_height);
+ intel_fb_plane_get_subsampling(&hsub, &vsub, fb, ccs_plane);
+
+ tile_width *= hsub;
+ tile_height *= vsub;
+
+ ccs_x = (x * hsub) % tile_width;
+ ccs_y = (y * vsub) % tile_height;
+
+ main_plane = skl_ccs_to_main_plane(fb, ccs_plane);
+ main_x = intel_fb->normal_view.color_plane[main_plane].x % tile_width;
+ main_y = intel_fb->normal_view.color_plane[main_plane].y % tile_height;
+
+ /*
+ * CCS doesn't have its own x/y offset register, so the intra CCS tile
+ * x/y offsets must match between CCS and the main surface.
+ */
+ if (main_x != ccs_x || main_y != ccs_y) {
+ drm_dbg_kms(&i915->drm,
+ "Bad CCS x/y (main %d,%d ccs %d,%d) full (main %d,%d ccs %d,%d)\n",
+ main_x, main_y,
+ ccs_x, ccs_y,
+ intel_fb->normal_view.color_plane[main_plane].x,
+ intel_fb->normal_view.color_plane[main_plane].y,
+ x, y);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static bool intel_plane_can_remap(const struct intel_plane_state *plane_state)
+{
+ struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane);
+ struct drm_i915_private *i915 = to_i915(plane->base.dev);
+ const struct drm_framebuffer *fb = plane_state->hw.fb;
+ int i;
+
+ /* We don't want to deal with remapping with cursors */
+ if (plane->id == PLANE_CURSOR)
+ return false;
+
+ /*
+ * The display engine limits already match/exceed the
+ * render engine limits, so not much point in remapping.
+ * Would also need to deal with the fence POT alignment
+ * and gen2 2KiB GTT tile size.
+ */
+ if (DISPLAY_VER(i915) < 4)
+ return false;
+
+ /*
+ * The new CCS hash mode isn't compatible with remapping as
+ * the virtual address of the pages affects the compressed data.
+ */
+ if (is_ccs_modifier(fb->modifier))
+ return false;
+
+ /* Linear needs a page aligned stride for remapping */
+ if (fb->modifier == DRM_FORMAT_MOD_LINEAR) {
+ unsigned int alignment = intel_tile_size(i915) - 1;
+
+ for (i = 0; i < fb->format->num_planes; i++) {
+ if (fb->pitches[i] & alignment)
+ return false;
+ }
+ }
+
+ return true;
+}
+
+static bool intel_fb_needs_pot_stride_remap(const struct intel_framebuffer *fb)
+{
+ return false;
+}
+
+static int intel_fb_pitch(const struct intel_framebuffer *fb, int color_plane, unsigned int rotation)
+{
+ if (drm_rotation_90_or_270(rotation))
+ return fb->rotated_view.color_plane[color_plane].stride;
+ else if (intel_fb_needs_pot_stride_remap(fb))
+ return fb->remapped_view.color_plane[color_plane].stride;
+ else
+ return fb->normal_view.color_plane[color_plane].stride;
+}
+
+static bool intel_plane_needs_remap(const struct intel_plane_state *plane_state)
+{
+ struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane);
+ const struct intel_framebuffer *fb = to_intel_framebuffer(plane_state->hw.fb);
+ unsigned int rotation = plane_state->hw.rotation;
+ u32 stride, max_stride;
+
+ /*
+ * No remapping for invisible planes since we don't have
+ * an actual source viewport to remap.
+ */
+ if (!plane_state->uapi.visible)
+ return false;
+
+ if (!intel_plane_can_remap(plane_state))
+ return false;
+
+ /*
+ * FIXME: aux plane limits on gen9+ are
+ * unclear in Bspec, for now no checking.
+ */
+ stride = intel_fb_pitch(fb, 0, rotation);
+ max_stride = plane->max_stride(plane, fb->base.format->format,
+ fb->base.modifier, rotation);
+
+ return stride > max_stride;
+}
+
+static int convert_plane_offset_to_xy(const struct intel_framebuffer *fb, int color_plane,
+ int plane_width, int *x, int *y)
+{
+ struct drm_i915_gem_object *obj = intel_fb_obj(&fb->base);
+ int ret;
+
+ ret = intel_fb_offset_to_xy(x, y, &fb->base, color_plane);
+ if (ret) {
+ drm_dbg_kms(fb->base.dev,
+ "bad fb plane %d offset: 0x%x\n",
+ color_plane, fb->base.offsets[color_plane]);
+ return ret;
+ }
+
+ ret = intel_fb_check_ccs_xy(&fb->base, color_plane, *x, *y);
+ if (ret)
+ return ret;
+
+ /*
+ * The fence (if used) is aligned to the start of the object
+ * so having the framebuffer wrap around across the edge of the
+ * fenced region doesn't really work. We have no API to configure
+ * the fence start offset within the object (nor could we probably
+ * on gen2/3). So it's just easier if we just require that the
+ * fb layout agrees with the fence layout. We already check that the
+ * fb stride matches the fence stride elsewhere.
+ */
+ if (color_plane == 0 && i915_gem_object_is_tiled(obj) &&
+ (*x + plane_width) * fb->base.format->cpp[color_plane] > fb->base.pitches[color_plane]) {
+ drm_dbg_kms(fb->base.dev,
+ "bad fb plane %d offset: 0x%x\n",
+ color_plane, fb->base.offsets[color_plane]);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static u32 calc_plane_aligned_offset(const struct intel_framebuffer *fb, int color_plane, int *x, int *y)
+{
+ struct drm_i915_private *i915 = to_i915(fb->base.dev);
+ unsigned int tile_size = intel_tile_size(i915);
+ u32 offset;
+
+ offset = intel_compute_aligned_offset(i915, x, y, &fb->base, color_plane,
+ fb->base.pitches[color_plane],
+ DRM_MODE_ROTATE_0,
+ tile_size);
+
+ return offset / tile_size;
+}
+
+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_src_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_dst_stride_tiles(const struct intel_framebuffer *fb, int color_plane,
+ unsigned int pitch_tiles)
+{
+ if (intel_fb_needs_pot_stride_remap(fb))
+ return roundup_pow_of_two(pitch_tiles);
+ else
+ return pitch_tiles;
+}
+
+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);
+}
+
+#define assign_chk_ovf(i915, var, val) ({ \
+ drm_WARN_ON(&(i915)->drm, overflows_type(val, var)); \
+ (var) = (val); \
+})
+
+static u32 calc_plane_remap_info(const struct intel_framebuffer *fb, int color_plane,
+ const struct fb_plane_view_dims *dims,
+ u32 obj_offset, u32 gtt_offset, int x, int y,
+ struct intel_fb_view *view)
+{
+ struct drm_i915_private *i915 = to_i915(fb->base.dev);
+ struct intel_remapped_plane_info *remap_info = &view->gtt.remapped.plane[color_plane];
+ struct i915_color_plane_view *color_plane_info = &view->color_plane[color_plane];
+ unsigned int tile_width = dims->tile_width;
+ unsigned int tile_height = dims->tile_height;
+ unsigned int tile_size = intel_tile_size(i915);
+ struct drm_rect r;
+ u32 size;
+
+ assign_chk_ovf(i915, remap_info->offset, obj_offset);
+ assign_chk_ovf(i915, remap_info->src_stride, plane_view_src_stride_tiles(fb, color_plane, dims));
+ assign_chk_ovf(i915, remap_info->width, plane_view_width_tiles(fb, color_plane, dims, x));
+ assign_chk_ovf(i915, remap_info->height, plane_view_height_tiles(fb, color_plane, dims, y));
+
+ if (view->gtt.type == I915_GGTT_VIEW_ROTATED) {
+ check_array_bounds(i915, view->gtt.rotated.plane, color_plane);
+
+ assign_chk_ovf(i915, remap_info->dst_stride,
+ plane_view_dst_stride_tiles(fb, color_plane, remap_info->height));
+
+ /* rotate the x/y offsets to match the GTT view */
+ drm_rect_init(&r, x, y, dims->width, dims->height);
+ drm_rect_rotate(&r,
+ remap_info->width * tile_width,
+ remap_info->height * tile_height,
+ DRM_MODE_ROTATE_270);
+
+ color_plane_info->x = r.x1;
+ color_plane_info->y = r.y1;
+
+ color_plane_info->stride = remap_info->dst_stride * tile_height;
+
+ size = remap_info->dst_stride * remap_info->width;
+
+ /* rotate the tile dimensions to match the GTT view */
+ swap(tile_width, tile_height);
+ } else {
+ drm_WARN_ON(&i915->drm, view->gtt.type != I915_GGTT_VIEW_REMAPPED);
+
+ check_array_bounds(i915, view->gtt.remapped.plane, color_plane);
+
+ assign_chk_ovf(i915, remap_info->dst_stride,
+ plane_view_dst_stride_tiles(fb, color_plane, remap_info->width));
+
+ color_plane_info->x = x;
+ color_plane_info->y = y;
+
+ color_plane_info->stride = remap_info->dst_stride * tile_width *
+ fb->base.format->cpp[color_plane];
+
+ size = remap_info->dst_stride * remap_info->height;
+ }
+
+ /*
+ * We only keep the x/y offsets, so push all of the gtt offset into
+ * the x/y offsets. x,y will hold the first pixel of the framebuffer
+ * plane from the start of the remapped/rotated gtt mapping.
+ */
+ intel_adjust_tile_offset(&color_plane_info->x, &color_plane_info->y,
+ tile_width, tile_height,
+ tile_size, remap_info->dst_stride,
+ gtt_offset * tile_size, 0);
+
+ return size;
+}
+
+#undef assign_chk_ovf
+
+/* 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_src_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;
+}
+
+static void intel_fb_view_init(struct intel_fb_view *view, enum i915_ggtt_view_type view_type)
+{
+ memset(view, 0, sizeof(*view));
+ view->gtt.type = view_type;
+}
+
+int intel_fill_fb_info(struct drm_i915_private *i915, struct drm_framebuffer *fb)
+{
+ struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
+ struct drm_i915_gem_object *obj = intel_fb_obj(fb);
+ u32 gtt_offset_rotated = 0;
+ u32 gtt_offset_remapped = 0;
+ unsigned int max_size = 0;
+ int i, num_planes = fb->format->num_planes;
+ unsigned int tile_size = intel_tile_size(i915);
+
+ intel_fb_view_init(&intel_fb->normal_view, I915_GGTT_VIEW_NORMAL);
+ intel_fb_view_init(&intel_fb->rotated_view, I915_GGTT_VIEW_ROTATED);
+ intel_fb_view_init(&intel_fb->remapped_view, I915_GGTT_VIEW_REMAPPED);
+
+ for (i = 0; i < num_planes; i++) {
+ struct fb_plane_view_dims view_dims;
+ unsigned int width, height;
+ unsigned int cpp, size;
+ u32 offset;
+ int x, y;
+ int ret;
+
+ /*
+ * Plane 2 of Render Compression with Clear Color fb modifier
+ * is consumed by the driver and not passed to DE. Skip the
+ * arithmetic related to alignment and offset calculation.
+ */
+ if (is_gen12_ccs_cc_plane(fb, i)) {
+ if (IS_ALIGNED(fb->offsets[i], PAGE_SIZE))
+ continue;
+ else
+ return -EINVAL;
+ }
+
+ cpp = fb->format->cpp[i];
+ intel_fb_plane_dims(&width, &height, fb, i);
+
+ ret = convert_plane_offset_to_xy(intel_fb, i, width, &x, &y);
+ 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.
+ */
+ intel_fb->normal_view.color_plane[i].x = x;
+ intel_fb->normal_view.color_plane[i].y = y;
+ intel_fb->normal_view.color_plane[i].stride = intel_fb->base.pitches[i];
+
+ offset = calc_plane_aligned_offset(intel_fb, i, &x, &y);
+
+ /* Y or Yf modifiers required for 90/270 rotation */
+ if (fb->modifier == I915_FORMAT_MOD_Y_TILED ||
+ fb->modifier == I915_FORMAT_MOD_Yf_TILED)
+ gtt_offset_rotated += calc_plane_remap_info(intel_fb, i, &view_dims,
+ offset, gtt_offset_rotated, x, y,
+ &intel_fb->rotated_view);
+
+ if (intel_fb_needs_pot_stride_remap(intel_fb))
+ gtt_offset_remapped += calc_plane_remap_info(intel_fb, i, &view_dims,
+ offset, gtt_offset_remapped, x, y,
+ &intel_fb->remapped_view);
+
+ 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);
+ }
+
+ if (mul_u32_u32(max_size, tile_size) > obj->base.size) {
+ drm_dbg_kms(&i915->drm,
+ "fb too big for bo (need %llu bytes, have %zu bytes)\n",
+ mul_u32_u32(max_size, tile_size), obj->base.size);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void intel_plane_remap_gtt(struct intel_plane_state *plane_state)
+{
+ struct drm_i915_private *i915 =
+ to_i915(plane_state->uapi.plane->dev);
+ struct drm_framebuffer *fb = plane_state->hw.fb;
+ struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
+ unsigned int rotation = plane_state->hw.rotation;
+ int i, num_planes = fb->format->num_planes;
+ unsigned int src_x, src_y;
+ unsigned int src_w, src_h;
+ u32 gtt_offset = 0;
+
+ intel_fb_view_init(&plane_state->view,
+ drm_rotation_90_or_270(rotation) ? I915_GGTT_VIEW_ROTATED :
+ I915_GGTT_VIEW_REMAPPED);
+
+ src_x = plane_state->uapi.src.x1 >> 16;
+ src_y = plane_state->uapi.src.y1 >> 16;
+ src_w = drm_rect_width(&plane_state->uapi.src) >> 16;
+ src_h = drm_rect_height(&plane_state->uapi.src) >> 16;
+
+ drm_WARN_ON(&i915->drm, is_ccs_modifier(fb->modifier));
+
+ /* Make src coordinates relative to the viewport */
+ drm_rect_translate(&plane_state->uapi.src,
+ -(src_x << 16), -(src_y << 16));
+
+ /* Rotate src coordinates to match rotated GTT view */
+ if (drm_rotation_90_or_270(rotation))
+ drm_rect_rotate(&plane_state->uapi.src,
+ src_w << 16, src_h << 16,
+ DRM_MODE_ROTATE_270);
+
+ for (i = 0; i < num_planes; i++) {
+ unsigned int hsub = i ? fb->format->hsub : 1;
+ unsigned int vsub = i ? fb->format->vsub : 1;
+ struct fb_plane_view_dims view_dims;
+ unsigned int width, height;
+ unsigned int x, y;
+ u32 offset;
+
+ x = src_x / hsub;
+ y = src_y / vsub;
+ width = src_w / hsub;
+ height = src_h / vsub;
+
+ init_plane_view_dims(intel_fb, i, width, height, &view_dims);
+
+ /*
+ * First pixel of the src viewport from the
+ * start of the normal gtt mapping.
+ */
+ x += intel_fb->normal_view.color_plane[i].x;
+ y += intel_fb->normal_view.color_plane[i].y;
+
+ offset = calc_plane_aligned_offset(intel_fb, i, &x, &y);
+
+ gtt_offset += calc_plane_remap_info(intel_fb, i, &view_dims,
+ offset, gtt_offset, x, y,
+ &plane_state->view);
+ }
+}
+
+void intel_fb_fill_view(const struct intel_framebuffer *fb, unsigned int rotation,
+ struct intel_fb_view *view)
+{
+ if (drm_rotation_90_or_270(rotation))
+ *view = fb->rotated_view;
+ else if (intel_fb_needs_pot_stride_remap(fb))
+ *view = fb->remapped_view;
+ else
+ *view = fb->normal_view;
+}
+
+static int intel_plane_check_stride(const struct intel_plane_state *plane_state)
+{
+ struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane);
+ const struct drm_framebuffer *fb = plane_state->hw.fb;
+ unsigned int rotation = plane_state->hw.rotation;
+ u32 stride, max_stride;
+
+ /*
+ * We ignore stride for all invisible planes that
+ * can be remapped. Otherwise we could end up
+ * with a false positive when the remapping didn't
+ * kick in due the plane being invisible.
+ */
+ if (intel_plane_can_remap(plane_state) &&
+ !plane_state->uapi.visible)
+ return 0;
+
+ /* FIXME other color planes? */
+ stride = plane_state->view.color_plane[0].stride;
+ max_stride = plane->max_stride(plane, fb->format->format,
+ fb->modifier, rotation);
+
+ if (stride > max_stride) {
+ DRM_DEBUG_KMS("[FB:%d] stride (%d) exceeds [PLANE:%d:%s] max stride (%d)\n",
+ fb->base.id, stride,
+ plane->base.base.id, plane->base.name, max_stride);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+int intel_plane_compute_gtt(struct intel_plane_state *plane_state)
+{
+ const struct intel_framebuffer *fb =
+ to_intel_framebuffer(plane_state->hw.fb);
+ unsigned int rotation = plane_state->hw.rotation;
+
+ if (!fb)
+ return 0;
+
+ if (intel_plane_needs_remap(plane_state)) {
+ intel_plane_remap_gtt(plane_state);
+
+ /*
+ * Sometimes even remapping can't overcome
+ * the stride limitations :( Can happen with
+ * big plane sizes and suitably misaligned
+ * offsets.
+ */
+ return intel_plane_check_stride(plane_state);
+ }
+
+ intel_fb_fill_view(fb, rotation, &plane_state->view);
+
+ /* Rotate src coordinates to match rotated GTT view */
+ if (drm_rotation_90_or_270(rotation))
+ drm_rect_rotate(&plane_state->uapi.src,
+ fb->base.width << 16, fb->base.height << 16,
+ DRM_MODE_ROTATE_270);
+
+ return intel_plane_check_stride(plane_state);
+}
generated by cgit v1.2.3 (git 2.39.0) at 2025-10-31 17:12:10 +0300