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path: root/drivers/gpu/drm/vkms/vkms_crc.c
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Diffstat (limited to 'drivers/gpu/drm/vkms/vkms_crc.c')
-rw-r--r--drivers/gpu/drm/vkms/vkms_crc.c272
1 files changed, 0 insertions, 272 deletions
diff --git a/drivers/gpu/drm/vkms/vkms_crc.c b/drivers/gpu/drm/vkms/vkms_crc.c
deleted file mode 100644
index e66ff25c008e..000000000000
--- a/drivers/gpu/drm/vkms/vkms_crc.c
+++ /dev/null
@@ -1,272 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-
-#include "vkms_drv.h"
-#include <linux/crc32.h>
-#include <drm/drm_atomic.h>
-#include <drm/drm_atomic_helper.h>
-#include <drm/drm_gem_framebuffer_helper.h>
-
-/**
- * compute_crc - Compute CRC value on output frame
- *
- * @vaddr_out: address to final framebuffer
- * @crc_out: framebuffer's metadata
- *
- * returns CRC value computed using crc32 on the visible portion of
- * the final framebuffer at vaddr_out
- */
-static uint32_t compute_crc(void *vaddr_out, struct vkms_crc_data *crc_out)
-{
- int i, j, src_offset;
- int x_src = crc_out->src.x1 >> 16;
- int y_src = crc_out->src.y1 >> 16;
- int h_src = drm_rect_height(&crc_out->src) >> 16;
- int w_src = drm_rect_width(&crc_out->src) >> 16;
- u32 crc = 0;
-
- for (i = y_src; i < y_src + h_src; ++i) {
- for (j = x_src; j < x_src + w_src; ++j) {
- src_offset = crc_out->offset
- + (i * crc_out->pitch)
- + (j * crc_out->cpp);
- /* XRGB format ignores Alpha channel */
- memset(vaddr_out + src_offset + 24, 0, 8);
- crc = crc32_le(crc, vaddr_out + src_offset,
- sizeof(u32));
- }
- }
-
- return crc;
-}
-
-/**
- * blend - belnd value at vaddr_src with value at vaddr_dst
- * @vaddr_dst: destination address
- * @vaddr_src: source address
- * @crc_dst: destination framebuffer's metadata
- * @crc_src: source framebuffer's metadata
- *
- * Blend value at vaddr_src with value at vaddr_dst.
- * Currently, this function write value at vaddr_src on value
- * at vaddr_dst using buffer's metadata to locate the new values
- * from vaddr_src and their distenation at vaddr_dst.
- *
- * Todo: Use the alpha value to blend vaddr_src with vaddr_dst
- * instead of overwriting it.
- */
-static void blend(void *vaddr_dst, void *vaddr_src,
- struct vkms_crc_data *crc_dst,
- struct vkms_crc_data *crc_src)
-{
- int i, j, j_dst, i_dst;
- int offset_src, offset_dst;
-
- int x_src = crc_src->src.x1 >> 16;
- int y_src = crc_src->src.y1 >> 16;
-
- int x_dst = crc_src->dst.x1;
- int y_dst = crc_src->dst.y1;
- int h_dst = drm_rect_height(&crc_src->dst);
- int w_dst = drm_rect_width(&crc_src->dst);
-
- int y_limit = y_src + h_dst;
- int x_limit = x_src + w_dst;
-
- for (i = y_src, i_dst = y_dst; i < y_limit; ++i) {
- for (j = x_src, j_dst = x_dst; j < x_limit; ++j) {
- offset_dst = crc_dst->offset
- + (i_dst * crc_dst->pitch)
- + (j_dst++ * crc_dst->cpp);
- offset_src = crc_src->offset
- + (i * crc_src->pitch)
- + (j * crc_src->cpp);
-
- memcpy(vaddr_dst + offset_dst,
- vaddr_src + offset_src, sizeof(u32));
- }
- i_dst++;
- }
-}
-
-static void compose_cursor(struct vkms_crc_data *cursor_crc,
- struct vkms_crc_data *primary_crc, void *vaddr_out)
-{
- struct drm_gem_object *cursor_obj;
- struct vkms_gem_object *cursor_vkms_obj;
-
- cursor_obj = drm_gem_fb_get_obj(&cursor_crc->fb, 0);
- cursor_vkms_obj = drm_gem_to_vkms_gem(cursor_obj);
-
- mutex_lock(&cursor_vkms_obj->pages_lock);
- if (!cursor_vkms_obj->vaddr) {
- DRM_WARN("cursor plane vaddr is NULL");
- goto out;
- }
-
- blend(vaddr_out, cursor_vkms_obj->vaddr, primary_crc, cursor_crc);
-
-out:
- mutex_unlock(&cursor_vkms_obj->pages_lock);
-}
-
-static uint32_t _vkms_get_crc(struct vkms_crc_data *primary_crc,
- struct vkms_crc_data *cursor_crc)
-{
- struct drm_framebuffer *fb = &primary_crc->fb;
- struct drm_gem_object *gem_obj = drm_gem_fb_get_obj(fb, 0);
- struct vkms_gem_object *vkms_obj = drm_gem_to_vkms_gem(gem_obj);
- void *vaddr_out = kzalloc(vkms_obj->gem.size, GFP_KERNEL);
- u32 crc = 0;
-
- if (!vaddr_out) {
- DRM_ERROR("Failed to allocate memory for output frame.");
- return 0;
- }
-
- mutex_lock(&vkms_obj->pages_lock);
- if (WARN_ON(!vkms_obj->vaddr)) {
- mutex_unlock(&vkms_obj->pages_lock);
- kfree(vaddr_out);
- return crc;
- }
-
- memcpy(vaddr_out, vkms_obj->vaddr, vkms_obj->gem.size);
- mutex_unlock(&vkms_obj->pages_lock);
-
- if (cursor_crc)
- compose_cursor(cursor_crc, primary_crc, vaddr_out);
-
- crc = compute_crc(vaddr_out, primary_crc);
-
- kfree(vaddr_out);
-
- return crc;
-}
-
-/**
- * vkms_crc_work_handle - ordered work_struct to compute CRC
- *
- * @work: work_struct
- *
- * Work handler for computing CRCs. work_struct scheduled in
- * an ordered workqueue that's periodically scheduled to run by
- * _vblank_handle() and flushed at vkms_atomic_crtc_destroy_state().
- */
-void vkms_crc_work_handle(struct work_struct *work)
-{
- struct vkms_crtc_state *crtc_state = container_of(work,
- struct vkms_crtc_state,
- crc_work);
- struct drm_crtc *crtc = crtc_state->base.crtc;
- struct vkms_output *out = drm_crtc_to_vkms_output(crtc);
- struct vkms_device *vdev = container_of(out, struct vkms_device,
- output);
- struct vkms_crc_data *primary_crc = NULL;
- struct vkms_crc_data *cursor_crc = NULL;
- struct drm_plane *plane;
- u32 crc32 = 0;
- u64 frame_start, frame_end;
- unsigned long flags;
-
- spin_lock_irqsave(&out->state_lock, flags);
- frame_start = crtc_state->frame_start;
- frame_end = crtc_state->frame_end;
- spin_unlock_irqrestore(&out->state_lock, flags);
-
- /* _vblank_handle() hasn't updated frame_start yet */
- if (!frame_start || frame_start == frame_end)
- goto out;
-
- drm_for_each_plane(plane, &vdev->drm) {
- struct vkms_plane_state *vplane_state;
- struct vkms_crc_data *crc_data;
-
- vplane_state = to_vkms_plane_state(plane->state);
- crc_data = vplane_state->crc_data;
-
- if (drm_framebuffer_read_refcount(&crc_data->fb) == 0)
- continue;
-
- if (plane->type == DRM_PLANE_TYPE_PRIMARY)
- primary_crc = crc_data;
- else
- cursor_crc = crc_data;
- }
-
- if (primary_crc)
- crc32 = _vkms_get_crc(primary_crc, cursor_crc);
-
- frame_end = drm_crtc_accurate_vblank_count(crtc);
-
- /* queue_work can fail to schedule crc_work; add crc for
- * missing frames
- */
- while (frame_start <= frame_end)
- drm_crtc_add_crc_entry(crtc, true, frame_start++, &crc32);
-
-out:
- /* to avoid using the same value for frame number again */
- spin_lock_irqsave(&out->state_lock, flags);
- crtc_state->frame_end = frame_end;
- crtc_state->frame_start = 0;
- spin_unlock_irqrestore(&out->state_lock, flags);
-}
-
-static const char * const pipe_crc_sources[] = {"auto"};
-
-const char *const *vkms_get_crc_sources(struct drm_crtc *crtc,
- size_t *count)
-{
- *count = ARRAY_SIZE(pipe_crc_sources);
- return pipe_crc_sources;
-}
-
-static int vkms_crc_parse_source(const char *src_name, bool *enabled)
-{
- int ret = 0;
-
- if (!src_name) {
- *enabled = false;
- } else if (strcmp(src_name, "auto") == 0) {
- *enabled = true;
- } else {
- *enabled = false;
- ret = -EINVAL;
- }
-
- return ret;
-}
-
-int vkms_verify_crc_source(struct drm_crtc *crtc, const char *src_name,
- size_t *values_cnt)
-{
- bool enabled;
-
- if (vkms_crc_parse_source(src_name, &enabled) < 0) {
- DRM_DEBUG_DRIVER("unknown source %s\n", src_name);
- return -EINVAL;
- }
-
- *values_cnt = 1;
-
- return 0;
-}
-
-int vkms_set_crc_source(struct drm_crtc *crtc, const char *src_name)
-{
- struct vkms_output *out = drm_crtc_to_vkms_output(crtc);
- bool enabled = false;
- unsigned long flags;
- int ret = 0;
-
- ret = vkms_crc_parse_source(src_name, &enabled);
-
- /* make sure nothing is scheduled on crtc workq */
- flush_workqueue(out->crc_workq);
-
- spin_lock_irqsave(&out->lock, flags);
- out->crc_enabled = enabled;
- spin_unlock_irqrestore(&out->lock, flags);
-
- return ret;
-}
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