Re: [Intel-gfx] [PATCH v3 04/18] drm/selftest: Add drm damage helper selftest

Daniel Vetter
2018-10-11T16:23:11Z

On Wed, Oct 10, 2018 at 05:16:43PM -0700, Deepak Rawat wrote:
> Selftest for drm damage helper iterator functions.
>
> Cc: ville.syrjala@linux.intel.com
> Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> Cc: Pekka Paalanen <ppaalanen@gmail.com>
> Cc: Daniel Stone <daniel@fooishbar.org>
> Cc: intel-gfx@lists.freedesktop.org
> Cc: igt-dev@lists.freedesktop.org
> Cc: petri.latvala@intel.com
> Cc: chris@chris-wilson.co.uk
> Signed-off-by: Deepak Rawat <drawat@vmware.com>
> ---
> drivers/gpu/drm/selftests/Makefile | 3 +-
> .../selftests/drm_damage_helper_selftests.h | 22 +
> .../drm/selftests/test-drm_damage_helper.c | 844 ++++++++++++++++++
> 3 files changed, 868 insertions(+), 1 deletion(-)
> create mode 100644 drivers/gpu/drm/selftests/drm_damage_helper_selftests.h
> create mode 100644 drivers/gpu/drm/selftests/test-drm_damage_helper.c
>
> diff --git a/drivers/gpu/drm/selftests/Makefile b/drivers/gpu/drm/selftests/Makefile
> index 9fc349fa18e9..88ac216f5962 100644
> --- a/drivers/gpu/drm/selftests/Makefile
> +++ b/drivers/gpu/drm/selftests/Makefile
> @@ -1 +1,2 @@
> -obj-$(CONFIG_DRM_DEBUG_SELFTEST) += test-drm_mm.o test-drm-helper.o
> +obj-$(CONFIG_DRM_DEBUG_SELFTEST) += test-drm_mm.o test-drm-helper.o \
> + test-drm_damage_helper.o

With the testcase intagrated into the test-drm-helper.ko module, for
patches 1-4 in this series:

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>

Obviously needs some adjusting on the igt side too, since we seem to be
missing the igt scaffolding for tests-drm-helper.ko.
-Daniel

> diff --git a/drivers/gpu/drm/selftests/drm_damage_helper_selftests.h b/drivers/gpu/drm/selftests/drm_damage_helper_selftests.h
> new file mode 100644
> index 000000000000..3a1cbe05bef0
> --- /dev/null
> +++ b/drivers/gpu/drm/selftests/drm_damage_helper_selftests.h
> @@ -0,0 +1,22 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +selftest(damage_iter_no_damage, igt_damage_iter_no_damage)
> +selftest(damage_iter_no_damage_fractional_src, igt_damage_iter_no_damage_fractional_src)
> +selftest(damage_iter_no_damage_src_moved, igt_damage_iter_no_damage_src_moved)
> +selftest(damage_iter_no_damage_fractional_src_moved, igt_damage_iter_no_damage_fractional_src_moved)
> +selftest(damage_iter_no_damage_not_visible, igt_damage_iter_no_damage_not_visible)
> +selftest(damage_iter_no_damage_no_crtc, igt_damage_iter_no_damage_no_crtc)
> +selftest(damage_iter_no_damage_no_fb, igt_damage_iter_no_damage_no_fb)
> +selftest(damage_iter_simple_damage, igt_damage_iter_simple_damage)
> +selftest(damage_iter_single_damage, igt_damage_iter_single_damage)
> +selftest(damage_iter_single_damage_intersect_src, igt_damage_iter_single_damage_intersect_src)
> +selftest(damage_iter_single_damage_outside_src, igt_damage_iter_single_damage_outside_src)
> +selftest(damage_iter_single_damage_fractional_src, igt_damage_iter_single_damage_fractional_src)
> +selftest(damage_iter_single_damage_intersect_fractional_src, igt_damage_iter_single_damage_intersect_fractional_src)
> +selftest(damage_iter_single_damage_outside_fractional_src, igt_damage_iter_single_damage_outside_fractional_src)
> +selftest(damage_iter_single_damage_src_moved, igt_damage_iter_single_damage_src_moved)
> +selftest(damage_iter_single_damage_fractional_src_moved, igt_damage_iter_single_damage_fractional_src_moved)
> +selftest(damage_iter_damage, igt_damage_iter_damage)
> +selftest(damage_iter_damage_one_intersect, igt_damage_iter_damage_one_intersect)
> +selftest(damage_iter_damage_one_outside, igt_damage_iter_damage_one_outside)
> +selftest(damage_iter_damage_src_moved, igt_damage_iter_damage_src_moved)
> +selftest(damage_iter_damage_not_visible, igt_damage_iter_damage_not_visible)
> diff --git a/drivers/gpu/drm/selftests/test-drm_damage_helper.c b/drivers/gpu/drm/selftests/test-drm_damage_helper.c
> new file mode 100644
> index 000000000000..17754734c47a
> --- /dev/null
> +++ b/drivers/gpu/drm/selftests/test-drm_damage_helper.c
> @@ -0,0 +1,844 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Test case for drm_damage_helper functions
> + */
> +
> +#define pr_fmt(fmt) "drm_damage_helper: " fmt
> +
> +#include <linux/module.h>
> +#include <drm/drm_damage_helper.h>
> +
> +#define TESTS "drm_damage_helper_selftests.h"
> +#include "drm_selftest.h"
> +
> +#define FAIL(test, msg, ...) \
> + do { \
> + if (test) { \
> + pr_err("%s/%u: " msg, __FUNCTION__, __LINE__, ##__VA_ARGS__); \
> + return -EINVAL; \
> + } \
> + } while (0)
> +
> +#define FAIL_ON(x) FAIL((x), "%s", "FAIL_ON(" __stringify(x) ")\n")
> +
> +static void set_plane_src(struct drm_plane_state *state, int x1, int y1, int x2,
> + int y2)
> +{
> + state->src.x1 = x1;
> + state->src.y1 = y1;
> + state->src.x2 = x2;
> + state->src.y2 = y2;
> +}
> +
> +static void set_damage_clip(struct drm_mode_rect *r, int x1, int y1, int x2,
> + int y2)
> +{
> + r->x1 = x1;
> + r->y1 = y1;
> + r->x2 = x2;
> + r->y2 = y2;
> +}
> +
> +static void set_damage_blob(struct drm_property_blob *damage_blob,
> + struct drm_mode_rect *r, uint32_t size)
> +{
> + damage_blob->length = size;
> + damage_blob->data = r;
> +}
> +
> +static void set_plane_damage(struct drm_plane_state *state,
> + struct drm_property_blob *damage_blob)
> +{
> + state->fb_damage_clips = damage_blob;
> +}
> +
> +static bool check_damage_clip(struct drm_plane_state *state, struct drm_rect *r,
> + int x1, int y1, int x2, int y2)
> +{
> + /*
> + * Round down x1/y1 and round up x2/y2. This is because damage is not in
> + * 16.16 fixed point so to catch all pixels.
> + */
> + int src_x1 = state->src.x1 >> 16;
> + int src_y1 = state->src.y1 >> 16;
> + int src_x2 = (state->src.x2 >> 16) + !!(state->src.x2 & 0xFFFF);
> + int src_y2 = (state->src.y2 >> 16) + !!(state->src.y2 & 0xFFFF);
> +
> + if (x1 >= x2 || y1 >= y2) {
> + pr_err("Cannot have damage clip with no dimention.\n");
> + return false;
> + }
> +
> + if (x1 < src_x1 || y1 < src_y1 || x2 > src_x2 || y2 > src_y2) {
> + pr_err("Damage cannot be outside rounded plane src.\n");
> + return false;
> + }
> +
> + if (r->x1 != x1 || r->y1 != y1 || r->x2 != x2 || r->y2 != y2) {
> + pr_err("Damage = %d %d %d %d\n", r->x1, r->y1, r->x2, r->y2);
> + return false;
> + }
> +
> + return true;
> +}
> +
> +static int igt_damage_iter_no_damage(void *ignored)
> +{
> + struct drm_atomic_helper_damage_iter iter;
> + struct drm_plane_state old_state;
> + struct drm_rect clip;
> + uint32_t num_hits = 0;
> +
> + struct drm_framebuffer fb = {
> + .width = 2048,
> + .height = 2048
> + };
> +
> + struct drm_plane_state state = {
> + .crtc = ZERO_SIZE_PTR,
> + .fb = &fb,
> + .visible = true,
> + };
> +
> + /* Plane src same as fb size. */
> + set_plane_src(&old_state, 0, 0, fb.width << 16, fb.height << 16);
> + set_plane_src(&state, 0, 0, fb.width << 16, fb.height << 16);
> + drm_atomic_helper_damage_iter_init(&iter, &old_state, &state);
> + drm_atomic_for_each_plane_damage(&iter, &clip)
> + num_hits++;
> +
> + FAIL(num_hits != 1, "Should return plane src as damage.");
> + FAIL_ON(!check_damage_clip(&state, &clip, 0, 0, 2048, 2048));
> +
> + return 0;
> +}
> +
> +static int igt_damage_iter_no_damage_fractional_src(void *ignored)
> +{
> + struct drm_atomic_helper_damage_iter iter;
> + struct drm_plane_state old_state;
> + struct drm_rect clip;
> + uint32_t num_hits = 0;
> +
> + struct drm_framebuffer fb = {
> + .width = 2048,
> + .height = 2048
> + };
> +
> + struct drm_plane_state state = {
> + .crtc = ZERO_SIZE_PTR,
> + .fb = &fb,
> + .visible = true,
> + };
> +
> + /* Plane src has fractional part. */
> + set_plane_src(&old_state, 0x3fffe, 0x3fffe,
> + 0x3fffe + (1024 << 16), 0x3fffe + (768 << 16));
> + set_plane_src(&state, 0x3fffe, 0x3fffe,
> + 0x3fffe + (1024 << 16), 0x3fffe + (768 << 16));
> + drm_atomic_helper_damage_iter_init(&iter, &old_state, &state);
> + drm_atomic_for_each_plane_damage(&iter, &clip)
> + num_hits++;
> +
> + FAIL(num_hits != 1, "Should return rounded off plane src as damage.");
> + FAIL_ON(!check_damage_clip(&state, &clip, 3, 3, 1028, 772));
> +
> + return 0;
> +}
> +
> +static int igt_damage_iter_no_damage_src_moved(void *ignored)
> +{
> + struct drm_atomic_helper_damage_iter iter;
> + struct drm_plane_state old_state;
> + struct drm_rect clip;
> + uint32_t num_hits = 0;
> +
> + struct drm_framebuffer fb = {
> + .width = 2048,
> + .height = 2048
> + };
> +
> + struct drm_plane_state state = {
> + .crtc = ZERO_SIZE_PTR,
> + .fb = &fb,
> + .visible = true,
> + };
> +
> + /* Plane src moved since old plane state. */
> + set_plane_src(&old_state, 0, 0, 1024 << 16, 768 << 16);
> + set_plane_src(&state, 10 << 16, 10 << 16,
> + (10 + 1024) << 16, (10 + 768) << 16);
> + drm_atomic_helper_damage_iter_init(&iter, &old_state, &state);
> + drm_atomic_for_each_plane_damage(&iter, &clip)
> + num_hits++;
> +
> + FAIL(num_hits != 1, "Should return plane src as damage.");
> + FAIL_ON(!check_damage_clip(&state, &clip, 10, 10, 1034, 778));
> +
> + return 0;
> +}
> +
> +static int igt_damage_iter_no_damage_fractional_src_moved(void *ignored)
> +{
> + struct drm_atomic_helper_damage_iter iter;
> + struct drm_plane_state old_state;
> + struct drm_rect clip;
> + uint32_t num_hits = 0;
> +
> + struct drm_framebuffer fb = {
> + .width = 2048,
> + .height = 2048
> + };
> +
> + struct drm_plane_state state = {
> + .crtc = ZERO_SIZE_PTR,
> + .fb = &fb,
> + .visible = true,
> + };
> +
> + /* Plane src has fractional part and it moved since old plane state. */
> + set_plane_src(&old_state, 0x3fffe, 0x3fffe,
> + 0x3fffe + (1024 << 16), 0x3fffe + (768 << 16));
> + set_plane_src(&state, 0x40002, 0x40002,
> + 0x40002 + (1024 << 16), 0x40002 + (768 << 16));
> + drm_atomic_helper_damage_iter_init(&iter, &old_state, &state);
> + drm_atomic_for_each_plane_damage(&iter, &clip)
> + num_hits++;
> +
> + FAIL(num_hits != 1, "Should return plane src as damage.");
> + FAIL_ON(!check_damage_clip(&state, &clip, 4, 4, 1029, 773));
> +
> + return 0;
> +}
> +
> +static int igt_damage_iter_no_damage_not_visible(void *ignored)
> +{
> + struct drm_atomic_helper_damage_iter iter;
> + struct drm_plane_state old_state;
> + struct drm_rect clip;
> + uint32_t num_hits = 0;
> +
> + struct drm_framebuffer fb = {
> + .width = 2048,
> + .height = 2048
> + };
> +
> + struct drm_plane_state state = {
> + .crtc = ZERO_SIZE_PTR,
> + .fb = &fb,
> + .visible = false,
> + };
> +
> + set_plane_src(&old_state, 0, 0, 1024 << 16, 768 << 16);
> + set_plane_src(&state, 0, 0, 1024 << 16, 768 << 16);
> + drm_atomic_helper_damage_iter_init(&iter, &old_state, &state);
> + drm_atomic_for_each_plane_damage(&iter, &clip)
> + num_hits++;
> +
> + FAIL(num_hits != 0, "Should have no damage.");
> +
> + return 0;
> +}
> +
> +static int igt_damage_iter_no_damage_no_crtc(void *ignored)
> +{
> + struct drm_atomic_helper_damage_iter iter;
> + struct drm_plane_state old_state;
> + struct drm_rect clip;
> + uint32_t num_hits = 0;
> +
> + struct drm_framebuffer fb = {
> + .width = 2048,
> + .height = 2048
> + };
> +
> + struct drm_plane_state state = {
> + .crtc = 0,
> + .fb = &fb,
> + };
> +
> + set_plane_src(&old_state, 0, 0, 1024 << 16, 768 << 16);
> + set_plane_src(&state, 0, 0, 1024 << 16, 768 << 16);
> + drm_atomic_helper_damage_iter_init(&iter, &old_state, &state);
> + drm_atomic_for_each_plane_damage(&iter, &clip)
> + num_hits++;
> +
> + FAIL(num_hits != 0, "Should have no damage.");
> +
> + return 0;
> +}
> +
> +static int igt_damage_iter_no_damage_no_fb(void *ignored)
> +{
> + struct drm_atomic_helper_damage_iter iter;
> + struct drm_plane_state old_state;
> + struct drm_rect clip;
> + uint32_t num_hits = 0;
> +
> + struct drm_plane_state state = {
> + .crtc = ZERO_SIZE_PTR,
> + .fb = 0,
> + };
> +
> + set_plane_src(&old_state, 0, 0, 1024 << 16, 768 << 16);
> + set_plane_src(&state, 0, 0, 1024 << 16, 768 << 16);
> + drm_atomic_helper_damage_iter_init(&iter, &old_state, &state);
> + drm_atomic_for_each_plane_damage(&iter, &clip)
> + num_hits++;
> +
> + FAIL(num_hits != 0, "Should have no damage.");
> +
> + return 0;
> +}
> +
> +static int igt_damage_iter_simple_damage(void *ignored)
> +{
> + struct drm_atomic_helper_damage_iter iter;
> + struct drm_plane_state old_state;
> + struct drm_property_blob damage_blob;
> + struct drm_mode_rect damage;
> + struct drm_rect clip;
> + uint32_t num_hits = 0;
> +
> + struct drm_framebuffer fb = {
> + .width = 2048,
> + .height = 2048
> + };
> +
> + struct drm_plane_state state = {
> + .crtc = ZERO_SIZE_PTR,
> + .fb = &fb,
> + .visible = true,
> + };
> +
> + set_plane_src(&old_state, 0, 0, 1024 << 16, 768 << 16);
> + set_plane_src(&state, 0, 0, 1024 << 16, 768 << 16);
> + /* Damage set to plane src */
> + set_damage_clip(&damage, 0, 0, 1024, 768);
> + set_damage_blob(&damage_blob, &damage, sizeof(damage));
> + set_plane_damage(&state, &damage_blob);
> + drm_atomic_helper_damage_iter_init(&iter, &old_state, &state);
> + drm_atomic_for_each_plane_damage(&iter, &clip)
> + num_hits++;
> +
> + FAIL(num_hits != 1, "Should return damage when set.");
> + FAIL_ON(!check_damage_clip(&state, &clip, 0, 0, 1024, 768));
> +
> + return 0;
> +}
> +
> +static int igt_damage_iter_single_damage(void *ignored)
> +{
> + struct drm_atomic_helper_damage_iter iter;
> + struct drm_plane_state old_state;
> + struct drm_property_blob damage_blob;
> + struct drm_mode_rect damage;
> + struct drm_rect clip;
> + uint32_t num_hits = 0;
> +
> + struct drm_framebuffer fb = {
> + .width = 2048,
> + .height = 2048
> + };
> +
> + struct drm_plane_state state = {
> + .crtc = ZERO_SIZE_PTR,
> + .fb = &fb,
> + .visible = true,
> + };
> +
> + set_plane_src(&old_state, 0, 0, 1024 << 16, 768 << 16);
> + set_plane_src(&state, 0, 0, 1024 << 16, 768 << 16);
> + set_damage_clip(&damage, 256, 192, 768, 576);
> + set_damage_blob(&damage_blob, &damage, sizeof(damage));
> + set_plane_damage(&state, &damage_blob);
> + drm_atomic_helper_damage_iter_init(&iter, &old_state, &state);
> + drm_atomic_for_each_plane_damage(&iter, &clip)
> + num_hits++;
> +
> + FAIL(num_hits != 1, "Should return damage when set.");
> + FAIL_ON(!check_damage_clip(&state, &clip, 256, 192, 768, 576));
> +
> + return 0;
> +}
> +
> +static int igt_damage_iter_single_damage_intersect_src(void *ignored)
> +{
> + struct drm_atomic_helper_damage_iter iter;
> + struct drm_plane_state old_state;
> + struct drm_property_blob damage_blob;
> + struct drm_mode_rect damage;
> + struct drm_rect clip;
> + uint32_t num_hits = 0;
> +
> + struct drm_framebuffer fb = {
> + .width = 2048,
> + .height = 2048
> + };
> +
> + struct drm_plane_state state = {
> + .crtc = ZERO_SIZE_PTR,
> + .fb = &fb,
> + .visible = true,
> + };
> +
> + set_plane_src(&old_state, 0, 0, 1024 << 16, 768 << 16);
> + set_plane_src(&state, 0, 0, 1024 << 16, 768 << 16);
> + /* Damage intersect with plane src. */
> + set_damage_clip(&damage, 256, 192, 1360, 768);
> + set_damage_blob(&damage_blob, &damage, sizeof(damage));
> + set_plane_damage(&state, &damage_blob);
> + drm_atomic_helper_damage_iter_init(&iter, &old_state, &state);
> + drm_atomic_for_each_plane_damage(&iter, &clip)
> + num_hits++;
> +
> + FAIL(num_hits != 1, "Should return damage clipped to src.");
> + FAIL_ON(!check_damage_clip(&state, &clip, 256, 192, 1024, 768));
> +
> + return 0;
> +}
> +
> +static int igt_damage_iter_single_damage_outside_src(void *ignored)
> +{
> + struct drm_atomic_helper_damage_iter iter;
> + struct drm_plane_state old_state;
> + struct drm_property_blob damage_blob;
> + struct drm_mode_rect damage;
> + struct drm_rect clip;
> + uint32_t num_hits = 0;
> +
> + struct drm_framebuffer fb = {
> + .width = 2048,
> + .height = 2048
> + };
> +
> + struct drm_plane_state state = {
> + .crtc = ZERO_SIZE_PTR,
> + .fb = &fb,
> + .visible = true,
> + };
> +
> + set_plane_src(&old_state, 0, 0, 1024 << 16, 768 << 16);
> + set_plane_src(&state, 0, 0, 1024 << 16, 768 << 16);
> + /* Damage clip outside plane src */
> + set_damage_clip(&damage, 1360, 1360, 1380, 1380);
> + set_damage_blob(&damage_blob, &damage, sizeof(damage));
> + set_plane_damage(&state, &damage_blob);
> + drm_atomic_helper_damage_iter_init(&iter, &old_state, &state);
> + drm_atomic_for_each_plane_damage(&iter, &clip)
> + num_hits++;
> +
> + FAIL(num_hits != 0, "Should have no damage.");
> +
> + return 0;
> +}
> +
> +static int igt_damage_iter_single_damage_fractional_src(void *ignored)
> +{
> + struct drm_atomic_helper_damage_iter iter;
> + struct drm_plane_state old_state;
> + struct drm_property_blob damage_blob;
> + struct drm_mode_rect damage;
> + struct drm_rect clip;
> + uint32_t num_hits = 0;
> +
> + struct drm_framebuffer fb = {
> + .width = 2048,
> + .height = 2048
> + };
> +
> + struct drm_plane_state state = {
> + .crtc = ZERO_SIZE_PTR,
> + .fb = &fb,
> + .visible = true,
> + };
> +
> + /* Plane src has fractional part. */
> + set_plane_src(&old_state, 0x40002, 0x40002,
> + 0x40002 + (1024 << 16), 0x40002 + (768 << 16));
> + set_plane_src(&state, 0x40002, 0x40002,
> + 0x40002 + (1024 << 16), 0x40002 + (768 << 16));
> + set_damage_clip(&damage, 10, 10, 256, 330);
> + set_damage_blob(&damage_blob, &damage, sizeof(damage));
> + set_plane_damage(&state, &damage_blob);
> + drm_atomic_helper_damage_iter_init(&iter, &old_state, &state);
> + drm_atomic_for_each_plane_damage(&iter, &clip)
> + num_hits++;
> +
> + FAIL(num_hits != 1, "Should return damage when set.");
> + FAIL_ON(!check_damage_clip(&state, &clip, 10, 10, 256, 330));
> +
> + return 0;
> +}
> +
> +static int igt_damage_iter_single_damage_intersect_fractional_src(void *ignored)
> +{
> + struct drm_atomic_helper_damage_iter iter;
> + struct drm_plane_state old_state;
> + struct drm_property_blob damage_blob;
> + struct drm_mode_rect damage;
> + struct drm_rect clip;
> + uint32_t num_hits = 0;
> +
> + struct drm_framebuffer fb = {
> + .width = 2048,
> + .height = 2048
> + };
> +
> + struct drm_plane_state state = {
> + .crtc = ZERO_SIZE_PTR,
> + .fb = &fb,
> + .visible = true,
> + };
> +
> + /* Plane src has fractional part. */
> + set_plane_src(&old_state, 0x40002, 0x40002,
> + 0x40002 + (1024 << 16), 0x40002 + (768 << 16));
> + set_plane_src(&state, 0x40002, 0x40002,
> + 0x40002 + (1024 << 16), 0x40002 + (768 << 16));
> + /* Damage intersect with plane src. */
> + set_damage_clip(&damage, 10, 1, 1360, 330);
> + set_damage_blob(&damage_blob, &damage, sizeof(damage));
> + set_plane_damage(&state, &damage_blob);
> + drm_atomic_helper_damage_iter_init(&iter, &old_state, &state);
> + drm_atomic_for_each_plane_damage(&iter, &clip)
> + num_hits++;
> +
> + FAIL(num_hits != 1, "Should return damage clipped to rounded off src.");
> + FAIL_ON(!check_damage_clip(&state, &clip, 10, 4, 1029, 330));
> +
> + return 0;
> +}
> +
> +static int igt_damage_iter_single_damage_outside_fractional_src(void *ignored)
> +{
> + struct drm_atomic_helper_damage_iter iter;
> + struct drm_plane_state old_state;
> + struct drm_property_blob damage_blob;
> + struct drm_mode_rect damage;
> + struct drm_rect clip;
> + uint32_t num_hits = 0;
> +
> + struct drm_framebuffer fb = {
> + .width = 2048,
> + .height = 2048
> + };
> +
> + struct drm_plane_state state = {
> + .crtc = ZERO_SIZE_PTR,
> + .fb = &fb,
> + .visible = true,
> + };
> +
> + /* Plane src has fractional part. */
> + set_plane_src(&old_state, 0x40002, 0x40002,
> + 0x40002 + (1024 << 16), 0x40002 + (768 << 16));
> + set_plane_src(&state, 0x40002, 0x40002,
> + 0x40002 + (1024 << 16), 0x40002 + (768 << 16));
> + /* Damage clip outside plane src */
> + set_damage_clip(&damage, 1360, 1360, 1380, 1380);
> + set_damage_blob(&damage_blob, &damage, sizeof(damage));
> + set_plane_damage(&state, &damage_blob);
> + drm_atomic_helper_damage_iter_init(&iter, &old_state, &state);
> + drm_atomic_for_each_plane_damage(&iter, &clip)
> + num_hits++;
> +
> + FAIL(num_hits != 0, "Should have no damage.");
> +
> + return 0;
> +}
> +
> +static int igt_damage_iter_single_damage_src_moved(void *ignored)
> +{
> + struct drm_atomic_helper_damage_iter iter;
> + struct drm_plane_state old_state;
> + struct drm_property_blob damage_blob;
> + struct drm_mode_rect damage;
> + struct drm_rect clip;
> + uint32_t num_hits = 0;
> +
> + struct drm_framebuffer fb = {
> + .width = 2048,
> + .height = 2048
> + };
> +
> + struct drm_plane_state state = {
> + .crtc = ZERO_SIZE_PTR,
> + .fb = &fb,
> + .visible = true,
> + };
> +
> + /* Plane src moved since old plane state. */
> + set_plane_src(&old_state, 0, 0, 1024 << 16, 768 << 16);
> + set_plane_src(&state, 10 << 16, 10 << 16,
> + (10 + 1024) << 16, (10 + 768) << 16);
> + set_damage_clip(&damage, 20, 30, 256, 256);
> + set_damage_blob(&damage_blob, &damage, sizeof(damage));
> + set_plane_damage(&state, &damage_blob);
> + drm_atomic_helper_damage_iter_init(&iter, &old_state, &state);
> + drm_atomic_for_each_plane_damage(&iter, &clip)
> + num_hits++;
> +
> + FAIL(num_hits != 1, "Should return plane src as damage.");
> + FAIL_ON(!check_damage_clip(&state, &clip, 10, 10, 1034, 778));
> +
> + return 0;
> +}
> +
> +static int igt_damage_iter_single_damage_fractional_src_moved(void *ignored)
> +{
> + struct drm_atomic_helper_damage_iter iter;
> + struct drm_plane_state old_state;
> + struct drm_property_blob damage_blob;
> + struct drm_mode_rect damage;
> + struct drm_rect clip;
> + uint32_t num_hits = 0;
> +
> + struct drm_framebuffer fb = {
> + .width = 2048,
> + .height = 2048
> + };
> +
> + struct drm_plane_state state = {
> + .crtc = ZERO_SIZE_PTR,
> + .fb = &fb,
> + .visible = true,
> + };
> +
> + /* Plane src with fractional part moved since old plane state. */
> + set_plane_src(&old_state, 0x3fffe, 0x3fffe,
> + 0x3fffe + (1024 << 16), 0x3fffe + (768 << 16));
> + set_plane_src(&state, 0x40002, 0x40002,
> + 0x40002 + (1024 << 16), 0x40002 + (768 << 16));
> + /* Damage intersect with plane src. */
> + set_damage_clip(&damage, 20, 30, 1360, 256);
> + set_damage_blob(&damage_blob, &damage, sizeof(damage));
> + set_plane_damage(&state, &damage_blob);
> + drm_atomic_helper_damage_iter_init(&iter, &old_state, &state);
> + drm_atomic_for_each_plane_damage(&iter, &clip)
> + num_hits++;
> +
> + FAIL(num_hits != 1, "Should return rounded off plane src as damage.");
> + FAIL_ON(!check_damage_clip(&state, &clip, 4, 4, 1029, 773));
> +
> + return 0;
> +}
> +
> +static int igt_damage_iter_damage(void *ignored)
> +{
> + struct drm_atomic_helper_damage_iter iter;
> + struct drm_plane_state old_state;
> + struct drm_property_blob damage_blob;
> + struct drm_mode_rect damage[2];
> + struct drm_rect clip;
> + uint32_t num_hits = 0;
> +
> + struct drm_framebuffer fb = {
> + .width = 2048,
> + .height = 2048
> + };
> +
> + struct drm_plane_state state = {
> + .crtc = ZERO_SIZE_PTR,
> + .fb = &fb,
> + .visible = true,
> + };
> +
> + set_plane_src(&old_state, 0, 0, 1024 << 16, 768 << 16);
> + set_plane_src(&state, 0, 0, 1024 << 16, 768 << 16);
> + /* 2 damage clips. */
> + set_damage_clip(&damage[0], 20, 30, 200, 180);
> + set_damage_clip(&damage[1], 240, 200, 280, 250);
> + set_damage_blob(&damage_blob, &damage[0], sizeof(damage));
> + set_plane_damage(&state, &damage_blob);
> + drm_atomic_helper_damage_iter_init(&iter, &old_state, &state);
> + drm_atomic_for_each_plane_damage(&iter, &clip) {
> + if (num_hits == 0)
> + FAIL_ON(!check_damage_clip(&state, &clip, 20, 30, 200, 180));
> + if (num_hits == 1)
> + FAIL_ON(!check_damage_clip(&state, &clip, 240, 200, 280, 250));
> + num_hits++;
> + }
> +
> + FAIL(num_hits != 2, "Should return damage when set.");
> +
> + return 0;
> +}
> +
> +static int igt_damage_iter_damage_one_intersect(void *ignored)
> +{
> + struct drm_atomic_helper_damage_iter iter;
> + struct drm_plane_state old_state;
> + struct drm_property_blob damage_blob;
> + struct drm_mode_rect damage[2];
> + struct drm_rect clip;
> + uint32_t num_hits = 0;
> +
> + struct drm_framebuffer fb = {
> + .width = 2048,
> + .height = 2048
> + };
> +
> + struct drm_plane_state state = {
> + .crtc = ZERO_SIZE_PTR,
> + .fb = &fb,
> + .visible = true,
> + };
> +
> + set_plane_src(&old_state, 0x40002, 0x40002,
> + 0x40002 + (1024 << 16), 0x40002 + (768 << 16));
> + set_plane_src(&state, 0x40002, 0x40002,
> + 0x40002 + (1024 << 16), 0x40002 + (768 << 16));
> + /* 2 damage clips, one intersect plane src. */
> + set_damage_clip(&damage[0], 20, 30, 200, 180);
> + set_damage_clip(&damage[1], 2, 2, 1360, 1360);
> + set_damage_blob(&damage_blob, &damage[0], sizeof(damage));
> + set_plane_damage(&state, &damage_blob);
> + drm_atomic_helper_damage_iter_init(&iter, &old_state, &state);
> + drm_atomic_for_each_plane_damage(&iter, &clip) {
> + if (num_hits == 0)
> + FAIL_ON(!check_damage_clip(&state, &clip, 20, 30, 200, 180));
> + if (num_hits == 1)
> + FAIL_ON(!check_damage_clip(&state, &clip, 4, 4, 1029, 773));
> + num_hits++;
> + }
> +
> + FAIL(num_hits != 2, "Should return damage when set.");
> +
> + return 0;
> +}
> +
> +static int igt_damage_iter_damage_one_outside(void *ignored)
> +{
> + struct drm_atomic_helper_damage_iter iter;
> + struct drm_plane_state old_state;
> + struct drm_property_blob damage_blob;
> + struct drm_mode_rect damage[2];
> + struct drm_rect clip;
> + uint32_t num_hits = 0;
> +
> + struct drm_framebuffer fb = {
> + .width = 2048,
> + .height = 2048
> + };
> +
> + struct drm_plane_state state = {
> + .crtc = ZERO_SIZE_PTR,
> + .fb = &fb,
> + .visible = true,
> + };
> +
> + set_plane_src(&old_state, 0, 0, 1024 << 16, 768 << 16);
> + set_plane_src(&state, 0, 0, 1024 << 16, 768 << 16);
> + /* 2 damage clips, one outside plane src. */
> + set_damage_clip(&damage[0], 1360, 1360, 1380, 1380);
> + set_damage_clip(&damage[1], 240, 200, 280, 250);
> + set_damage_blob(&damage_blob, &damage[0], sizeof(damage));
> + set_plane_damage(&state, &damage_blob);
> + drm_atomic_helper_damage_iter_init(&iter, &old_state, &state);
> + drm_atomic_for_each_plane_damage(&iter, &clip)
> + num_hits++;
> +
> + FAIL(num_hits != 1, "Should return damage when set.");
> + FAIL_ON(!check_damage_clip(&state, &clip, 240, 200, 280, 250));
> +
> + return 0;
> +}
> +
> +static int igt_damage_iter_damage_src_moved(void *ignored)
> +{
> + struct drm_atomic_helper_damage_iter iter;
> + struct drm_plane_state old_state;
> + struct drm_property_blob damage_blob;
> + struct drm_mode_rect damage[2];
> + struct drm_rect clip;
> + uint32_t num_hits = 0;
> +
> + struct drm_framebuffer fb = {
> + .width = 2048,
> + .height = 2048
> + };
> +
> + struct drm_plane_state state = {
> + .crtc = ZERO_SIZE_PTR,
> + .fb = &fb,
> + .visible = true,
> + };
> +
> + set_plane_src(&old_state, 0x40002, 0x40002,
> + 0x40002 + (1024 << 16), 0x40002 + (768 << 16));
> + set_plane_src(&state, 0x3fffe, 0x3fffe,
> + 0x3fffe + (1024 << 16), 0x3fffe + (768 << 16));
> + /* 2 damage clips, one outside plane src. */
> + set_damage_clip(&damage[0], 1360, 1360, 1380, 1380);
> + set_damage_clip(&damage[1], 240, 200, 280, 250);
> + set_damage_blob(&damage_blob, &damage[0], sizeof(damage));
> + set_plane_damage(&state, &damage_blob);
> + drm_atomic_helper_damage_iter_init(&iter, &old_state, &state);
> + drm_atomic_for_each_plane_damage(&iter, &clip)
> + num_hits++;
> +
> + FAIL(num_hits != 1, "Should return round off plane src as damage.");
> + FAIL_ON(!check_damage_clip(&state, &clip, 3, 3, 1028, 772));
> +
> + return 0;
> +}
> +
> +static int igt_damage_iter_damage_not_visible(void *ignored)
> +{
> + struct drm_atomic_helper_damage_iter iter;
> + struct drm_plane_state old_state;
> + struct drm_property_blob damage_blob;
> + struct drm_mode_rect damage[2];
> + struct drm_rect clip;
> + uint32_t num_hits = 0;
> +
> + struct drm_framebuffer fb = {
> + .width = 2048,
> + .height = 2048
> + };
> +
> + struct drm_plane_state state = {
> + .crtc = ZERO_SIZE_PTR,
> + .fb = &fb,
> + .visible = false,
> + };
> +
> + set_plane_src(&old_state, 0x40002, 0x40002,
> + 0x40002 + (1024 << 16), 0x40002 + (768 << 16));
> + set_plane_src(&state, 0x3fffe, 0x3fffe,
> + 0x3fffe + (1024 << 16), 0x3fffe + (768 << 16));
> + /* 2 damage clips, one outside plane src. */
> + set_damage_clip(&damage[0], 1360, 1360, 1380, 1380);
> + set_damage_clip(&damage[1], 240, 200, 280, 250);
> + set_damage_blob(&damage_blob, &damage[0], sizeof(damage));
> + set_plane_damage(&state, &damage_blob);
> + drm_atomic_helper_damage_iter_init(&iter, &old_state, &state);
> + drm_atomic_for_each_plane_damage(&iter, &clip)
> + num_hits++;
> +
> + FAIL(num_hits != 0, "Should not return any damage.");
> +
> + return 0;
> +}
> +
> +#include "drm_selftest.c"
> +
> +static int __init test_drm_damage_helper_init(void)
> +{
> + int err;
> +
> + err = run_selftests(selftests, ARRAY_SIZE(selftests), NULL);
> +
> + return err > 0 ? 0 : err;
> +}
> +
> +static void __exit test_drm_damage_helper_exit(void)
> +{
> +}
> +
> +module_init(test_drm_damage_helper_init);
> +module_exit(test_drm_damage_helper_exit);
> +
> +MODULE_AUTHOR("VMware Inc.");
> +MODULE_LICENSE("GPL");
> --
> 2.17.1
>

--
Daniel Vetter
Software Engineer, Intel Corporation