From ea2c67bb4affa84080c616920f3899f123786e56 Mon Sep 17 00:00:00 2001 From: Matt Roper Date: Tue, 23 Dec 2014 10:41:52 -0800 Subject: drm/i915: Move to atomic plane helpers (v9) Switch plane handling to use the atomic plane helpers. This means that rather than provide our own implementations of .update_plane() and .disable_plane(), we expose the lower-level check/prepare/commit/cleanup entrypoints and let the DRM core implement update/disable for us using those entrypoints. The other main change that falls out of this patch is that our drm_plane's will now always have a valid plane->state that contains the relevant plane state (initial state is allocated at plane creation). The base drm_plane_state pointed to holds the requested source/dest coordinates, and the subclassed intel_plane_state holds the adjusted values that our driver actually uses. v2: - Renamed file from intel_atomic.c to intel_atomic_plane.c (Daniel) - Fix a copy/paste comment mistake (Bob) v3: - Use prepare/cleanup functions that we've already factored out - Use newly refactored pre_commit/commit/post_commit to avoid sleeping during vblank evasion v4: - Rebase to latest di-nightly requires adding an 'old_state' parameter to atomic_update; v5: - Must have botched a rebase somewhere and lost some work. Restore state 'dirty' flag to let begin/end code know which planes to run the pre_commit/post_commit hooks for. This would have actually shown up as broken in the next commit rather than this one. v6: - Squash kerneldoc patch into this one. - Previous patches have now already taken care of most of the infrastructure that used to be in this patch. All we're adding here now is some thin wrappers. v7: - Check return of intel_plane_duplicate_state() for allocation failures. v8: - Drop unused drm_plane_state -> intel_plane_state cast. (Ander) - Squash in actual transition to plane helpers. Significant refactoring earlier in the patchset has made the combined prep+transition much easier to swallow than it was in earlier iterations. (Ander) v9: - s/track_fbs/disabled_planes/ in the atomic crtc flags. The only fb's we need to update frontbuffer tracking for are those on a plane about to be disabled (since the atomic helpers never call prepare_fb() when disabling a plane), so the new name more accurately describes what we're actually tracking. Testcase: igt/kms_plane Testcase: igt/kms_universal_plane Testcase: igt/kms_cursor_crc Signed-off-by: Matt Roper Reviewed-by: Ander Conselvan de Oliveira Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_atomic_plane.c | 151 ++++++++++++++++++++++++++++++ 1 file changed, 151 insertions(+) create mode 100644 drivers/gpu/drm/i915/intel_atomic_plane.c (limited to 'drivers/gpu/drm/i915/intel_atomic_plane.c') diff --git a/drivers/gpu/drm/i915/intel_atomic_plane.c b/drivers/gpu/drm/i915/intel_atomic_plane.c new file mode 100644 index 000000000000..e7425d6ca36f --- /dev/null +++ b/drivers/gpu/drm/i915/intel_atomic_plane.c @@ -0,0 +1,151 @@ +/* + * Copyright © 2014 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +/** + * DOC: atomic plane helper support + * + * The functions here are used by the atomic plane helper functions to + * implement legacy plane updates (i.e., drm_plane->update_plane() and + * drm_plane->disable_plane()). This allows plane updates to use the + * atomic state infrastructure and perform plane updates as separate + * prepare/check/commit/cleanup steps. + */ + +#include +#include +#include +#include "intel_drv.h" + +/** + * intel_plane_duplicate_state - duplicate plane state + * @plane: drm plane + * + * Allocates and returns a copy of the plane state (both common and + * Intel-specific) for the specified plane. + * + * Returns: The newly allocated plane state, or NULL or failure. + */ +struct drm_plane_state * +intel_plane_duplicate_state(struct drm_plane *plane) +{ + struct intel_plane_state *state; + + if (plane->state) + state = kmemdup(plane->state, sizeof(*state), GFP_KERNEL); + else + state = kzalloc(sizeof(*state), GFP_KERNEL); + + if (!state) + return NULL; + + if (state->base.fb) + drm_framebuffer_reference(state->base.fb); + + return &state->base; +} + +/** + * intel_plane_destroy_state - destroy plane state + * @plane: drm plane + * + * Destroys the plane state (both common and Intel-specific) for the + * specified plane. + */ +void +intel_plane_destroy_state(struct drm_plane *plane, + struct drm_plane_state *state) +{ + drm_atomic_helper_plane_destroy_state(plane, state); +} + +static int intel_plane_atomic_check(struct drm_plane *plane, + struct drm_plane_state *state) +{ + struct drm_crtc *crtc = state->crtc; + struct intel_crtc *intel_crtc; + struct intel_plane *intel_plane = to_intel_plane(plane); + struct intel_plane_state *intel_state = to_intel_plane_state(state); + + crtc = crtc ? crtc : plane->crtc; + intel_crtc = to_intel_crtc(crtc); + + /* + * The original src/dest coordinates are stored in state->base, but + * we want to keep another copy internal to our driver that we can + * clip/modify ourselves. + */ + intel_state->src.x1 = state->src_x; + intel_state->src.y1 = state->src_y; + intel_state->src.x2 = state->src_x + state->src_w; + intel_state->src.y2 = state->src_y + state->src_h; + intel_state->dst.x1 = state->crtc_x; + intel_state->dst.y1 = state->crtc_y; + intel_state->dst.x2 = state->crtc_x + state->crtc_w; + intel_state->dst.y2 = state->crtc_y + state->crtc_h; + + /* Clip all planes to CRTC size, or 0x0 if CRTC is disabled */ + intel_state->clip.x1 = 0; + intel_state->clip.y1 = 0; + intel_state->clip.x2 = + intel_crtc->active ? intel_crtc->config.pipe_src_w : 0; + intel_state->clip.y2 = + intel_crtc->active ? intel_crtc->config.pipe_src_h : 0; + + /* + * Disabling a plane is always okay; we just need to update + * fb tracking in a special way since cleanup_fb() won't + * get called by the plane helpers. + */ + if (state->fb == NULL && plane->state->fb != NULL) { + /* + * 'prepare' is never called when plane is being disabled, so + * we need to handle frontbuffer tracking as a special case + */ + intel_crtc->atomic.disabled_planes |= + (1 << drm_plane_index(plane)); + } + + return intel_plane->check_plane(plane, intel_state); +} + +static void intel_plane_atomic_update(struct drm_plane *plane, + struct drm_plane_state *old_state) +{ + struct intel_plane *intel_plane = to_intel_plane(plane); + struct intel_plane_state *intel_state = + to_intel_plane_state(plane->state); + + /* Don't disable an already disabled plane */ + if (!plane->state->fb && !old_state->fb) + return; + + intel_plane->commit_plane(plane, intel_state); +} + +const struct drm_plane_helper_funcs intel_plane_helper_funcs = { + .prepare_fb = intel_prepare_plane_fb, + .cleanup_fb = intel_cleanup_plane_fb, + .atomic_check = intel_plane_atomic_check, + .atomic_update = intel_plane_atomic_update, +}; + -- cgit