[Intel-gfx] [PATCH v4 4/8] drm/i915: Overcome display engine stride limits via GTT remapping
Daniel Vetter
daniel at ffwll.ch
Wed Jan 30 19:01:21 UTC 2019
On Thu, Jan 24, 2019 at 08:58:49PM +0200, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
>
> The display engine stride limits are getting in our way. On SKL+
> we are limited to 8k pixels, which is easily exceeded with three
> 4k displays. To overcome this limitation we can remap the pages
> in the GTT to provide the display engine with a view of memory
> with a smaller stride.
>
> The code is mostly already there as We already play tricks with
> the plane surface address and x/y offsets.
>
> A few caveats apply:
> * linear buffers need the fb stride to be page aligned, as
> otherwise the remapped lines wouldn't start at the same
> spot
> * compressed buffers can't be remapped due to the new
> ccs hash mode causing the virtual address of the pages
> to affect the interpretation of the compressed data. IIRC
> the old hash was limited to the low 12 bits so if we were
> using that mode we could remap. As it stands we just refuse
> to remapp with compressed fbs.
> * no remapping gen2/3 as we'd need a fence for the remapped
> vma, which we currently don't have. Need to deal with the
> fence POT requirements, and do something about the gen2
> gtt page size vs tile size difference
>
> v2: Rebase due to is_ccs_modifier()
> Fix up the skl+ stride_mult mess
> memset() the gtt_view because otherwise we could leave
> junk in plane[1] when going from 2 plane to 1 plane format
> v3: intel_check_plane_stride() was split out
> v4: Drop the aligned viewport stuff, it was meant for ccs which
> can't be remapped anyway
> v5: Introduce intel_plane_can_remap()
> Reorder the code so that plane_state->view gets filled
> even for invisible planes, otherwise we'd keep using
> stale values and could explode during remapping. The new
> logic never remaps invisible planes since we don't have
> a viewport, and instead pins the full fb instead
>
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> ---
> drivers/gpu/drm/i915/intel_display.c | 393 +++++++++++++++++++++------
> drivers/gpu/drm/i915/intel_drv.h | 1 +
> drivers/gpu/drm/i915/intel_sprite.c | 34 ++-
> 3 files changed, 334 insertions(+), 94 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 17c7edee9584..3713b6f1796e 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -1865,7 +1865,7 @@ intel_tile_width_bytes(const struct drm_framebuffer *fb, int color_plane)
>
> switch (fb->modifier) {
> case DRM_FORMAT_MOD_LINEAR:
> - return cpp;
> + return intel_tile_size(dev_priv);
> case I915_FORMAT_MOD_X_TILED:
> if (IS_GEN(dev_priv, 2))
> return 128;
> @@ -1908,11 +1908,8 @@ intel_tile_width_bytes(const struct drm_framebuffer *fb, int color_plane)
> static unsigned int
> intel_tile_height(const struct drm_framebuffer *fb, int color_plane)
> {
> - if (fb->modifier == DRM_FORMAT_MOD_LINEAR)
> - return 1;
> - else
> - return intel_tile_size(to_i915(fb->dev)) /
> - intel_tile_width_bytes(fb, color_plane);
> + return intel_tile_size(to_i915(fb->dev)) /
> + intel_tile_width_bytes(fb, color_plane);
> }
>
> /* Return the tile dimensions in pixel units */
> @@ -2170,16 +2167,8 @@ void intel_add_fb_offsets(int *x, int *y,
> int color_plane)
>
> {
> - const struct intel_framebuffer *intel_fb = to_intel_framebuffer(state->base.fb);
> - unsigned int rotation = state->base.rotation;
> -
> - if (drm_rotation_90_or_270(rotation)) {
> - *x += intel_fb->rotated[color_plane].x;
> - *y += intel_fb->rotated[color_plane].y;
> - } else {
> - *x += intel_fb->normal[color_plane].x;
> - *y += intel_fb->normal[color_plane].y;
> - }
> + *x += state->color_plane[color_plane].x;
> + *y += state->color_plane[color_plane].y;
> }
>
> static u32 intel_adjust_tile_offset(int *x, int *y,
> @@ -2459,6 +2448,119 @@ bool is_ccs_modifier(u64 modifier)
> modifier == I915_FORMAT_MOD_Yf_TILED_CCS;
> }
>
> +static
> +u32 intel_plane_fb_max_stride(struct drm_i915_private *dev_priv,
> + u32 pixel_format, u64 modifier)
> +{
> + struct intel_crtc *crtc;
> + struct intel_plane *plane;
> +
> + /*
> + * We assume the primary plane for pipe A has
> + * the highest stride limits of them all.
> + */
> + crtc = intel_get_crtc_for_pipe(dev_priv, PIPE_A);
> + plane = to_intel_plane(crtc->base.primary);
> +
> + return plane->max_stride(plane, pixel_format, modifier,
> + DRM_MODE_ROTATE_0);
> +}
> +
> +static
> +u32 intel_fb_max_stride(struct drm_i915_private *dev_priv,
> + u32 pixel_format, u64 modifier)
> +{
> + return intel_plane_fb_max_stride(dev_priv, pixel_format, modifier);
> +}
> +
> +static u32
> +intel_fb_stride_alignment(const struct drm_framebuffer *fb, int color_plane)
> +{
> + struct drm_i915_private *dev_priv = to_i915(fb->dev);
> +
> + if (fb->modifier == DRM_FORMAT_MOD_LINEAR) {
> + u32 max_stride = intel_plane_fb_max_stride(dev_priv,
> + fb->format->format,
> + fb->modifier);
> +
> + /*
> + * To make remapping with linear generally feasible
> + * we need the stride to be page aligned.
> + */
> + if (fb->pitches[color_plane] > max_stride)
> + return intel_tile_size(dev_priv);
> + else
> + return 64;
> + } else {
> + return intel_tile_width_bytes(fb, color_plane);
> + }
> +}
> +
> +bool intel_plane_can_remap(const struct intel_plane_state *plane_state)
> +{
> + struct intel_plane *plane = to_intel_plane(plane_state->base.plane);
> + struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
> + const struct drm_framebuffer *fb = plane_state->base.fb;
> + int i;
> +
> + /* We don't want to deal with remapping with cursors */
> + if (plane->id == PLANE_CURSOR)
> + return false;
They should be caught in the stride check below anyway ... why special
case?
> +
> + /*
> + * The dsplay engine limits already match 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 (INTEL_GEN(dev_priv) < 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) {
Not sure whether cramming linear formats into the same macheniry is really
clever in a good way or bad way (because too tricky). I guess it works,
and this is not something that's well explaing in some comments sprinkled
all over.
*shrug*
> + unsigned int alignment = intel_tile_size(dev_priv) - 1;
> +
> + for (i = 0; i < fb->format->num_planes; i++) {
> + if (fb->pitches[i] & alignment)
> + return false;
> + }
> + }
> +
> + return true;
> +}
> +
> +static bool intel_plane_needs_remap(const struct intel_plane_state *plane_state)
> +{
> + struct intel_plane *plane = to_intel_plane(plane_state->base.plane);
> + const struct drm_framebuffer *fb = plane_state->base.fb;
> + unsigned int rotation = plane_state->base.rotation;
> + u32 stride, max_stride;
> +
> + /*
> + * No remapping for invisible planes since we don't have
> + * an actual source viewport to remap.
> + */
> + if (!plane_state->base.visible)
> + return false;
> +
> + if (!intel_plane_can_remap(plane_state))
> + return false;
> +
> + /* FIXME other color planes? */
Should be simple to fix if we do a similar loop like in can_remap above.
Just true if any of them are bigger than max stride.
> + stride = intel_fb_pitch(fb, 0, rotation);
> + max_stride = plane->max_stride(plane, fb->format->format,
> + fb->modifier, rotation);
> +
> + return stride > max_stride;
> +}
> +
> static int
> intel_fill_fb_info(struct drm_i915_private *dev_priv,
> struct drm_framebuffer *fb)
> @@ -2624,6 +2726,172 @@ intel_fill_fb_info(struct drm_i915_private *dev_priv,
> return 0;
> }
>
> +static void
> +intel_plane_remap_gtt(struct intel_plane_state *plane_state)
> +{
> + struct drm_i915_private *dev_priv =
> + to_i915(plane_state->base.plane->dev);
> + struct drm_framebuffer *fb = plane_state->base.fb;
> + struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
> + struct intel_rotation_info *info = &plane_state->view.rotated;
> + unsigned int rotation = plane_state->base.rotation;
> + int i, num_planes = fb->format->num_planes;
> + unsigned int tile_size = intel_tile_size(dev_priv);
> + unsigned int src_x, src_y;
> + unsigned int src_w, src_h;
> + u32 gtt_offset = 0;
> +
> + memset(&plane_state->view, 0, sizeof(plane_state->view));
> + plane_state->view.type = drm_rotation_90_or_270(rotation) ?
> + I915_GGTT_VIEW_ROTATED : I915_GGTT_VIEW_REMAPPED;
> +
> + src_x = plane_state->base.src.x1 >> 16;
> + src_y = plane_state->base.src.y1 >> 16;
> + src_w = drm_rect_width(&plane_state->base.src) >> 16;
> + src_h = drm_rect_height(&plane_state->base.src) >> 16;
> +
> + WARN_ON(is_ccs_modifier(fb->modifier));
> +
> + /* Make src coordinates relative to the viewport */
> + drm_rect_translate(&plane_state->base.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->base.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;
> + unsigned int cpp = fb->format->cpp[i];
> + unsigned int tile_width, tile_height;
> + unsigned int width, height;
> + unsigned int pitch_tiles;
> + unsigned int x, y;
> + u32 offset;
> +
> + intel_tile_dims(fb, i, &tile_width, &tile_height);
> +
> + x = src_x / hsub;
> + y = src_y / vsub;
> + width = src_w / hsub;
> + height = src_h / vsub;
> +
> + /*
> + * First pixel of the src viewport from the
> + * start of the normal gtt mapping.
> + */
> + x += intel_fb->normal[i].x;
> + y += intel_fb->normal[i].y;
> +
> + offset = intel_compute_aligned_offset(dev_priv, &x, &y,
> + fb, i, fb->pitches[i],
> + DRM_MODE_ROTATE_0, tile_size);
> + offset /= tile_size;
> +
> + info->plane[i].offset = offset;
> + info->plane[i].stride = DIV_ROUND_UP(fb->pitches[i],
> + tile_width * cpp);
> + info->plane[i].width = DIV_ROUND_UP(x + width, tile_width);
> + info->plane[i].height = DIV_ROUND_UP(y + height, tile_height);
> +
> + if (drm_rotation_90_or_270(rotation)) {
> + struct drm_rect r;
> +
> + /* rotate the x/y offsets to match the GTT view */
> + r.x1 = x;
> + r.y1 = y;
> + r.x2 = x + width;
> + r.y2 = y + height;
> + drm_rect_rotate(&r,
> + info->plane[i].width * tile_width,
> + info->plane[i].height * tile_height,
> + DRM_MODE_ROTATE_270);
> + x = r.x1;
> + y = r.y1;
> +
> + pitch_tiles = info->plane[i].height;
> + plane_state->color_plane[i].stride = pitch_tiles * tile_height;
> +
> + /* rotate the tile dimensions to match the GTT view */
> + swap(tile_width, tile_height);
> + } else {
> + pitch_tiles = info->plane[i].width;
> + plane_state->color_plane[i].stride = pitch_tiles * tile_width * cpp;
> + }
> +
> + /*
> + * We only keep the x/y offsets, so push all of the
> + * gtt offset into the x/y offsets.
> + */
> + intel_adjust_tile_offset(&x, &y,
> + tile_width, tile_height,
> + tile_size, pitch_tiles,
> + gtt_offset * tile_size, 0);
> +
> + gtt_offset += info->plane[i].width * info->plane[i].height;
> +
> + plane_state->color_plane[i].offset = 0;
> + plane_state->color_plane[i].x = x;
> + plane_state->color_plane[i].y = y;
> + }
> +}
Validating this freaks me out. Keeping it working freaks me out even more,
there's pretty much a guarantee that we don't.
Also, I'm not sure CI exercises this much even with your hacks. Most of
our kms tests use single-crtc buffers, so no massive overallocation, so no
real need for views. The selftests are good, but they don't cover the
massive pile of pixel/coordination frobbing above.
I think only thing that can validate this is:
- a pile of igts that make sure we overallocate plentiful, while still
exercising all the major fb layouts (rotated, all the different cpp,
tiling formats, and throw in a ccs for lols to make sure nothing blows
up).
- kernel patch to prefer remmaped over normal. Don't move your buffers
around too much though :-)
Now the second part isn't really a real world thing, since even with
y-tiled that means remapping the view every 32 pixels (on average, worse
if your edges aren't aligned to 32 pixels, then it's twice as much).
So I think the only thing that works for validating this beast is a pile
of new igts that allocate dumb&tiled buffers at the size limit, and do all
the rotations/scaling/moving tests we already have.
Yes this is painful.
> +
> +static int
> +intel_plane_compute_gtt(struct intel_plane_state *plane_state)
> +{
> + const struct intel_framebuffer *fb =
> + to_intel_framebuffer(plane_state->base.fb);
> + unsigned int rotation = plane_state->base.rotation;
> + int i, num_planes;
> + int ret;
> +
> + if (!fb)
> + return 0;
> +
> + num_planes = fb->base.format->num_planes;
> +
> + if (intel_plane_needs_remap(plane_state)) {
> + intel_plane_remap_gtt(plane_state);
> +
> + /* Remapping should take care of this always */
> + ret = intel_plane_check_stride(plane_state);
> + if (WARN_ON(ret))
> + return ret;
> +
> + return 0;
> + }
> +
> + intel_fill_fb_ggtt_view(&plane_state->view, &fb->base, rotation);
> +
> + for (i = 0; i < num_planes; i++) {
> + plane_state->color_plane[i].stride = intel_fb_pitch(&fb->base, i, rotation);
> + plane_state->color_plane[i].offset = 0;
> +
> + if (drm_rotation_90_or_270(rotation)) {
> + plane_state->color_plane[i].x = fb->rotated[i].x;
> + plane_state->color_plane[i].y = fb->rotated[i].y;
> + } else {
> + plane_state->color_plane[i].x = fb->normal[i].x;
> + plane_state->color_plane[i].y = fb->normal[i].y;
> + }
> + }
> +
> + /* Rotate src coordinates to match rotated GTT view */
> + if (drm_rotation_90_or_270(rotation))
> + drm_rect_rotate(&plane_state->base.src,
> + fb->base.width << 16, fb->base.height << 16,
> + DRM_MODE_ROTATE_270);
> +
> + ret = intel_plane_check_stride(plane_state);
> + if (ret)
> + return ret;
> +
> + return 0;
> +}
Splitting the refactoring from the actual feature adding would be nice.
> +
> static int i9xx_format_to_fourcc(int format)
> {
> switch (format) {
> @@ -3127,26 +3395,15 @@ static int skl_check_ccs_aux_surface(struct intel_plane_state *plane_state)
> int skl_check_plane_surface(struct intel_plane_state *plane_state)
> {
> const struct drm_framebuffer *fb = plane_state->base.fb;
> - unsigned int rotation = plane_state->base.rotation;
> int ret;
>
> - intel_fill_fb_ggtt_view(&plane_state->view, fb, rotation);
> - plane_state->color_plane[0].stride = intel_fb_pitch(fb, 0, rotation);
> - plane_state->color_plane[1].stride = intel_fb_pitch(fb, 1, rotation);
> -
> - ret = intel_plane_check_stride(plane_state);
> + ret = intel_plane_compute_gtt(plane_state);
> if (ret)
> return ret;
>
> if (!plane_state->base.visible)
> return 0;
>
> - /* Rotate src coordinates to match rotated GTT view */
> - if (drm_rotation_90_or_270(rotation))
> - drm_rect_rotate(&plane_state->base.src,
> - fb->width << 16, fb->height << 16,
> - DRM_MODE_ROTATE_270);
> -
> /*
> * Handle the AUX surface first since
> * the main surface setup depends on it.
> @@ -3265,20 +3522,20 @@ int i9xx_check_plane_surface(struct intel_plane_state *plane_state)
> {
> struct drm_i915_private *dev_priv =
> to_i915(plane_state->base.plane->dev);
> - const struct drm_framebuffer *fb = plane_state->base.fb;
> - unsigned int rotation = plane_state->base.rotation;
> - int src_x = plane_state->base.src.x1 >> 16;
> - int src_y = plane_state->base.src.y1 >> 16;
> + int src_x, src_y;
> u32 offset;
> int ret;
>
> - intel_fill_fb_ggtt_view(&plane_state->view, fb, rotation);
> - plane_state->color_plane[0].stride = intel_fb_pitch(fb, 0, rotation);
> -
> - ret = intel_plane_check_stride(plane_state);
> + ret = intel_plane_compute_gtt(plane_state);
> if (ret)
> return ret;
>
> + if (!plane_state->base.visible)
> + return 0;
> +
> + src_x = plane_state->base.src.x1 >> 16;
> + src_y = plane_state->base.src.y1 >> 16;
> +
> intel_add_fb_offsets(&src_x, &src_y, plane_state, 0);
>
> if (INTEL_GEN(dev_priv) >= 4)
> @@ -3289,6 +3546,7 @@ int i9xx_check_plane_surface(struct intel_plane_state *plane_state)
>
> /* HSW/BDW do this automagically in hardware */
> if (!IS_HASWELL(dev_priv) && !IS_BROADWELL(dev_priv)) {
> + unsigned int rotation = plane_state->base.rotation;
> int src_w = drm_rect_width(&plane_state->base.src) >> 16;
> int src_h = drm_rect_height(&plane_state->base.src) >> 16;
>
> @@ -3325,6 +3583,10 @@ i9xx_plane_check(struct intel_crtc_state *crtc_state,
> if (ret)
> return ret;
>
> + ret = i9xx_check_plane_surface(plane_state);
> + if (ret)
> + return ret;
> +
> if (!plane_state->base.visible)
> return 0;
>
> @@ -3332,10 +3594,6 @@ i9xx_plane_check(struct intel_crtc_state *crtc_state,
> if (ret)
> return ret;
>
> - ret = i9xx_check_plane_surface(plane_state);
> - if (ret)
> - return ret;
> -
> plane_state->ctl = i9xx_plane_ctl(crtc_state, plane_state);
>
> return 0;
> @@ -3459,15 +3717,6 @@ static bool i9xx_plane_get_hw_state(struct intel_plane *plane,
> return ret;
> }
>
> -static u32
> -intel_fb_stride_alignment(const struct drm_framebuffer *fb, int color_plane)
> -{
> - if (fb->modifier == DRM_FORMAT_MOD_LINEAR)
> - return 64;
> - else
> - return intel_tile_width_bytes(fb, color_plane);
> -}
> -
> static void skl_detach_scaler(struct intel_crtc *intel_crtc, int id)
> {
> struct drm_device *dev = intel_crtc->base.dev;
> @@ -9830,19 +10079,17 @@ static bool intel_cursor_size_ok(const struct intel_plane_state *plane_state)
>
> static int intel_cursor_check_surface(struct intel_plane_state *plane_state)
> {
> - const struct drm_framebuffer *fb = plane_state->base.fb;
> - unsigned int rotation = plane_state->base.rotation;
> int src_x, src_y;
> u32 offset;
> int ret;
>
> - intel_fill_fb_ggtt_view(&plane_state->view, fb, rotation);
> - plane_state->color_plane[0].stride = intel_fb_pitch(fb, 0, rotation);
> -
> - ret = intel_plane_check_stride(plane_state);
> + ret = intel_plane_compute_gtt(plane_state);
> if (ret)
> return ret;
>
> + if (!plane_state->base.visible)
> + return 0;
> +
> src_x = plane_state->base.src_x >> 16;
> src_y = plane_state->base.src_y >> 16;
>
> @@ -9879,6 +10126,10 @@ static int intel_check_cursor(struct intel_crtc_state *crtc_state,
> if (ret)
> return ret;
>
> + ret = intel_cursor_check_surface(plane_state);
> + if (ret)
> + return ret;
> +
> if (!plane_state->base.visible)
> return 0;
>
> @@ -9886,10 +10137,6 @@ static int intel_check_cursor(struct intel_crtc_state *crtc_state,
> if (ret)
> return ret;
>
> - ret = intel_cursor_check_surface(plane_state);
> - if (ret)
> - return ret;
> -
> return 0;
> }
>
> @@ -14591,31 +14838,13 @@ static const struct drm_framebuffer_funcs intel_fb_funcs = {
> .dirty = intel_user_framebuffer_dirty,
> };
>
> -static
> -u32 intel_fb_pitch_limit(struct drm_i915_private *dev_priv,
> - u32 pixel_format, u64 fb_modifier)
> -{
> - struct intel_crtc *crtc;
> - struct intel_plane *plane;
> -
> - /*
> - * We assume the primary plane for pipe A has
> - * the highest stride limits of them all.
> - */
> - crtc = intel_get_crtc_for_pipe(dev_priv, PIPE_A);
> - plane = to_intel_plane(crtc->base.primary);
> -
> - return plane->max_stride(plane, pixel_format, fb_modifier,
> - DRM_MODE_ROTATE_0);
> -}
> -
> static int intel_framebuffer_init(struct intel_framebuffer *intel_fb,
> struct drm_i915_gem_object *obj,
> struct drm_mode_fb_cmd2 *mode_cmd)
> {
> struct drm_i915_private *dev_priv = to_i915(obj->base.dev);
> struct drm_framebuffer *fb = &intel_fb->base;
> - u32 pitch_limit;
> + u32 max_stride;
> unsigned int tiling, stride;
> int ret = -EINVAL;
> int i;
> @@ -14667,13 +14896,13 @@ static int intel_framebuffer_init(struct intel_framebuffer *intel_fb,
> goto err;
> }
>
> - pitch_limit = intel_fb_pitch_limit(dev_priv, mode_cmd->pixel_format,
> - mode_cmd->modifier[0]);
> - if (mode_cmd->pitches[0] > pitch_limit) {
> + max_stride = intel_fb_max_stride(dev_priv, mode_cmd->pixel_format,
> + mode_cmd->modifier[0]);
> + if (mode_cmd->pitches[0] > max_stride) {
> DRM_DEBUG_KMS("%s pitch (%u) must be at most %d\n",
> mode_cmd->modifier[0] != DRM_FORMAT_MOD_LINEAR ?
> "tiled" : "linear",
> - mode_cmd->pitches[0], pitch_limit);
> + mode_cmd->pitches[0], max_stride);
> goto err;
> }
>
We need an intel_framebuffer|plane.c. And a metric pile of other extracted
files, probably also per major platforms and stuff like that :-/
> diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> index 813626322fa3..0ee73f9dea7c 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -1586,6 +1586,7 @@ void intel_dump_cdclk_state(const struct intel_cdclk_state *cdclk_state,
> const char *context);
>
> /* intel_display.c */
> +bool intel_plane_can_remap(const struct intel_plane_state *plane_state);
> void i830_enable_pipe(struct drm_i915_private *dev_priv, enum pipe pipe);
> void i830_disable_pipe(struct drm_i915_private *dev_priv, enum pipe pipe);
> enum pipe intel_crtc_pch_transcoder(struct intel_crtc *crtc);
> diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
> index b02d3d9809e3..517747d08962 100644
> --- a/drivers/gpu/drm/i915/intel_sprite.c
> +++ b/drivers/gpu/drm/i915/intel_sprite.c
> @@ -237,6 +237,16 @@ int intel_plane_check_stride(const struct intel_plane_state *plane_state)
> unsigned int rotation = plane_state->base.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->base.visible)
> + return 0;
> +
> /* FIXME other color planes? */
> stride = plane_state->color_plane[0].stride;
> max_stride = plane->max_stride(plane, fb->format->format,
> @@ -1341,6 +1351,10 @@ g4x_sprite_check(struct intel_crtc_state *crtc_state,
> if (ret)
> return ret;
>
> + ret = i9xx_check_plane_surface(plane_state);
> + if (ret)
> + return ret;
> +
> if (!plane_state->base.visible)
> return 0;
>
> @@ -1352,10 +1366,6 @@ g4x_sprite_check(struct intel_crtc_state *crtc_state,
> if (ret)
> return ret;
>
> - ret = i9xx_check_plane_surface(plane_state);
> - if (ret)
> - return ret;
> -
> if (INTEL_GEN(dev_priv) >= 7)
> plane_state->ctl = ivb_sprite_ctl(crtc_state, plane_state);
> else
> @@ -1399,6 +1409,10 @@ vlv_sprite_check(struct intel_crtc_state *crtc_state,
> if (ret)
> return ret;
>
> + ret = i9xx_check_plane_surface(plane_state);
> + if (ret)
> + return ret;
> +
> if (!plane_state->base.visible)
> return 0;
>
> @@ -1406,10 +1420,6 @@ vlv_sprite_check(struct intel_crtc_state *crtc_state,
> if (ret)
> return ret;
>
> - ret = i9xx_check_plane_surface(plane_state);
> - if (ret)
> - return ret;
> -
> plane_state->ctl = vlv_sprite_ctl(crtc_state, plane_state);
>
> return 0;
> @@ -1556,6 +1566,10 @@ static int skl_plane_check(struct intel_crtc_state *crtc_state,
> if (ret)
> return ret;
>
> + ret = skl_check_plane_surface(plane_state);
> + if (ret)
> + return ret;
> +
> if (!plane_state->base.visible)
> return 0;
>
> @@ -1571,10 +1585,6 @@ static int skl_plane_check(struct intel_crtc_state *crtc_state,
> if (ret)
> return ret;
>
> - ret = skl_check_plane_surface(plane_state);
> - if (ret)
> - return ret;
> -
> /* HW only has 8 bits pixel precision, disable plane if invisible */
> if (!(plane_state->base.alpha >> 8))
> plane_state->base.visible = false;
Code looks good, but the testing freaks me out. Needs lots of igt, I'd say
at least similar amounts to what we've all added for the original
kms_rotation tests.
-Daniel
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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