[PATCH i-g-t 2/2] tests: Add kms plane alpha blending test.

[Maarten Lankhorst <maarten.lankhorst@linux.intel.com>]

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
 lib/igt_kms.c                 |   2 +
 lib/igt_kms.h                 |   2 +
 tests/Makefile.sources        |   1 +
 tests/kms_plane_alpha_blend.c | 561 ++++++++++++++++++++++++++++++++++
 tests/meson.build             |   1 +
 5 files changed, 567 insertions(+)
 create mode 100644 tests/kms_plane_alpha_blend.c

diff --git a/lib/igt_kms.c b/lib/igt_kms.c
index 9ac7ce73542a..f348f1c71e5e 100644
--- a/lib/igt_kms.c
+++ b/lib/igt_kms.c
@@ -173,6 +173,8 @@ const char * const igt_plane_prop_names[IGT_NUM_PLANE_PROPS] = {
 	[IGT_PLANE_TYPE] = "type",
 	[IGT_PLANE_ROTATION] = "rotation",
 	[IGT_PLANE_IN_FORMATS] = "IN_FORMATS",
+	[IGT_PLANE_PIXEL_BLEND_MODE] = "pixel blend mode",
+	[IGT_PLANE_ALPHA] = "alpha",
 };
 
 const char * const igt_crtc_prop_names[IGT_NUM_CRTC_PROPS] = {
diff --git a/lib/igt_kms.h b/lib/igt_kms.h
index b55881885b11..762eafb2e47e 100644
--- a/lib/igt_kms.h
+++ b/lib/igt_kms.h
@@ -264,6 +264,8 @@ enum igt_atomic_plane_properties {
        IGT_PLANE_TYPE,
        IGT_PLANE_ROTATION,
        IGT_PLANE_IN_FORMATS,
+       IGT_PLANE_PIXEL_BLEND_MODE,
+       IGT_PLANE_ALPHA,
        IGT_NUM_PLANE_PROPS
 };
 
diff --git a/tests/Makefile.sources b/tests/Makefile.sources
index 8197d59417b3..b607189dc37a 100644
--- a/tests/Makefile.sources
+++ b/tests/Makefile.sources
@@ -200,6 +200,7 @@ TESTS_progs = \
 	kms_pipe_b_c_ivb \
 	kms_pipe_crc_basic \
 	kms_plane \
+	kms_plane_alpha_blend \
 	kms_plane_lowres \
 	kms_plane_multiple \
 	kms_plane_scaling \
diff --git a/tests/kms_plane_alpha_blend.c b/tests/kms_plane_alpha_blend.c
new file mode 100644
index 000000000000..8ce9c460e9c2
--- /dev/null
+++ b/tests/kms_plane_alpha_blend.c
@@ -0,0 +1,561 @@
+/*
+ * Copyright © 2018 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.
+ *
+ */
+
+#include "igt.h"
+#include <math.h>
+
+IGT_TEST_DESCRIPTION("Test plane alpha and blending mode properties");
+
+typedef struct {
+	int gfx_fd;
+	igt_display_t display;
+	struct igt_fb xrgb_fb, argb_fb_0, argb_fb_cov_0, argb_fb_7e, argb_fb_cov_7e, argb_fb_fc, argb_fb_cov_fc, argb_fb_100, black_fb, gray_fb;
+	igt_crc_t ref_crc;
+	igt_pipe_crc_t *pipe_crc;
+} data_t;
+
+static void __draw_gradient(struct igt_fb *fb, int w, int h, double a, cairo_t *cr)
+{
+	cairo_pattern_t *pat;
+
+	pat = cairo_pattern_create_linear(0, 0, w, h);
+	cairo_pattern_add_color_stop_rgba(pat, 0.00, 0.00, 0.00, 0.00, 1.);
+	cairo_pattern_add_color_stop_rgba(pat, 0.25, 1.00, 1.00, 0.00, 1.);
+	cairo_pattern_add_color_stop_rgba(pat, 0.50, 0.00, 1.00, 1.00, 1.);
+	cairo_pattern_add_color_stop_rgba(pat, 0.75, 1.00, 0.00, 1.00, 1.);
+	cairo_pattern_add_color_stop_rgba(pat, 1.00, 1.00, 1.00, 1.00, 1.);
+
+	cairo_rectangle(cr, 0, 0, w, h);
+	cairo_set_source(cr, pat);
+	cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
+	cairo_paint_with_alpha(cr, a);
+	cairo_pattern_destroy(pat);
+}
+
+static void draw_gradient(struct igt_fb *fb, int w, int h, double a)
+{
+	cairo_t *cr = igt_get_cairo_ctx(fb->fd, fb);
+
+	__draw_gradient(fb, w, h, a, cr);
+
+	igt_put_cairo_ctx(fb->fd, fb, cr);
+}
+
+static void draw_gradient_coverage(struct igt_fb *fb, int w, int h, uint8_t a)
+{
+	cairo_t *cr = igt_get_cairo_ctx(fb->fd, fb);
+	uint8_t *data = cairo_image_surface_get_data(fb->cairo_surface);
+	uint32_t stride = fb->stride;
+	int i;
+
+	__draw_gradient(fb, w, h, 1., cr);
+
+	for (; h--; data += stride)
+		for (i = 0; i < w; i++)
+			data[i * 4 + 3] = a;
+
+	igt_put_cairo_ctx(fb->fd, fb, cr);
+}
+
+static void draw_squares(struct igt_fb *fb, int w, int h, double a)
+{
+	cairo_t *cr = igt_get_cairo_ctx(fb->fd, fb);
+
+	igt_paint_color_alpha(cr, 0, 0,         w / 2, h / 2, 1., 0., 0., a);
+	igt_paint_color_alpha(cr, w / 2, 0,     w / 2, h / 2, 0., 1., 0., a);
+	igt_paint_color_alpha(cr, 0, h / 2,     w / 2, h / 2, 0., 0., 1., a);
+	igt_paint_color_alpha(cr, w / 2, h / 2, w / 4, h / 2, 1., 1., 1., a);
+	igt_paint_color_alpha(cr, 3 * w / 4, h / 2, w / 4, h / 2, 0., 0., 0., a);
+
+	igt_put_cairo_ctx(fb->fd, fb, cr);
+}
+
+static void draw_squares_coverage(struct igt_fb *fb, int w, int h, uint8_t as)
+{
+	cairo_t *cr = igt_get_cairo_ctx(fb->fd, fb);
+	int i, j;
+	uint32_t *data = (void *)cairo_image_surface_get_data(fb->cairo_surface);
+	uint32_t stride = fb->stride / 4;
+	uint32_t a = as << 24;
+
+	for (j = 0; j < h / 2; j++) {
+		for (i = 0; i < w / 2; i++)
+			data[j * stride + i] = a | 0xff0000;
+
+		for (; i < w; i++)
+			data[j * stride + i] = a | 0xff00;
+	}
+
+	for (j = h / 2; j < h; j++) {
+		for (i = 0; i < w / 2; i++)
+			data[j * stride + i] = a | 0xff;
+
+		for (; i < 3 * w / 4; i++)
+			data[j * stride + i] = a | 0xffffff;
+
+		for (; i < w; i++)
+			data[j * stride + i] = a;
+	}
+
+	igt_put_cairo_ctx(fb->fd, fb, cr);
+}
+
+static void reset_alpha(igt_display_t *display, enum pipe pipe)
+{
+	igt_plane_t *plane;
+
+	for_each_plane_on_pipe(display, pipe, plane) {
+		if (igt_plane_has_prop(plane, IGT_PLANE_ALPHA))
+			igt_plane_set_prop_value(plane, IGT_PLANE_ALPHA, 0xffff);
+
+		if (igt_plane_has_prop(plane, IGT_PLANE_PIXEL_BLEND_MODE))
+			igt_plane_set_prop_enum(plane, IGT_PLANE_PIXEL_BLEND_MODE, "Pre-multiplied");
+	}
+}
+
+static void prepare_crtc(data_t *data, igt_output_t *output, enum pipe pipe)
+{
+	drmModeModeInfo *mode;
+	igt_display_t *display = &data->display;
+	int w, h;
+	igt_plane_t *primary = igt_pipe_get_plane_type(&display->pipes[pipe], DRM_PLANE_TYPE_PRIMARY);
+
+	igt_display_reset(display);
+	igt_output_set_pipe(output, pipe);
+
+	/* create the pipe_crc object for this pipe */
+	igt_pipe_crc_free(data->pipe_crc);
+	data->pipe_crc = igt_pipe_crc_new(data->gfx_fd, pipe, INTEL_PIPE_CRC_SOURCE_AUTO);
+
+	mode = igt_output_get_mode(output);
+	w = mode->hdisplay;
+	h = mode->vdisplay;
+
+	/* recreate all fbs if incompatible */
+	if (data->xrgb_fb.width != w || data->xrgb_fb.height != h) {
+		cairo_t *cr;
+
+		igt_remove_fb(data->gfx_fd, &data->xrgb_fb);
+		igt_remove_fb(data->gfx_fd, &data->argb_fb_0);
+		igt_remove_fb(data->gfx_fd, &data->argb_fb_cov_0);
+		igt_remove_fb(data->gfx_fd, &data->argb_fb_7e);
+		igt_remove_fb(data->gfx_fd, &data->argb_fb_fc);
+		igt_remove_fb(data->gfx_fd, &data->argb_fb_cov_7e);
+		igt_remove_fb(data->gfx_fd, &data->argb_fb_cov_fc);
+		igt_remove_fb(data->gfx_fd, &data->argb_fb_100);
+		igt_remove_fb(data->gfx_fd, &data->black_fb);
+		igt_remove_fb(data->gfx_fd, &data->gray_fb);
+
+		igt_create_fb(data->gfx_fd, w, h,
+			      DRM_FORMAT_XRGB8888, LOCAL_DRM_FORMAT_MOD_NONE,
+			      &data->xrgb_fb);
+		draw_gradient(&data->xrgb_fb, w, h, 1.);
+
+		igt_create_fb(data->gfx_fd, w, h,
+			      DRM_FORMAT_ARGB8888, LOCAL_DRM_FORMAT_MOD_NONE,
+			      &data->argb_fb_cov_0);
+		draw_gradient_coverage(&data->argb_fb_cov_0, w, h, 0);
+
+		igt_create_fb(data->gfx_fd, w, h,
+			      DRM_FORMAT_ARGB8888, LOCAL_DRM_FORMAT_MOD_NONE,
+			      &data->argb_fb_0);
+
+		cr = igt_get_cairo_ctx(data->gfx_fd, &data->argb_fb_0);
+		igt_paint_color_alpha(cr, 0, 0, w, h, 0., 0., 0., 1.0);
+		igt_put_cairo_ctx(data->gfx_fd, &data->argb_fb_0, cr);
+
+		igt_create_fb(data->gfx_fd, w, h,
+			      DRM_FORMAT_ARGB8888, LOCAL_DRM_FORMAT_MOD_NONE,
+			      &data->argb_fb_7e);
+		draw_squares(&data->argb_fb_7e, w, h, 126. / 255.);
+
+		igt_create_fb(data->gfx_fd, w, h,
+			      DRM_FORMAT_ARGB8888, LOCAL_DRM_FORMAT_MOD_NONE,
+			      &data->argb_fb_cov_7e);
+		draw_squares_coverage(&data->argb_fb_cov_7e, w, h, 0x7e);
+
+		igt_create_fb(data->gfx_fd, w, h,
+			      DRM_FORMAT_ARGB8888, LOCAL_DRM_FORMAT_MOD_NONE,
+			      &data->argb_fb_fc);
+		draw_squares(&data->argb_fb_fc, w, h, 252. / 255.);
+
+		igt_create_fb(data->gfx_fd, w, h,
+			      DRM_FORMAT_ARGB8888, LOCAL_DRM_FORMAT_MOD_NONE,
+			      &data->argb_fb_cov_fc);
+		draw_squares_coverage(&data->argb_fb_cov_fc, w, h, 0xfc);
+
+		igt_create_fb(data->gfx_fd, w, h,
+			      DRM_FORMAT_ARGB8888, LOCAL_DRM_FORMAT_MOD_NONE,
+			      &data->argb_fb_100);
+		draw_gradient(&data->argb_fb_100, w, h, 1.);
+
+		igt_create_fb(data->gfx_fd, w, h,
+			      DRM_FORMAT_XRGB8888, LOCAL_DRM_FORMAT_MOD_NONE,
+			      &data->black_fb);
+
+		igt_create_color_fb(data->gfx_fd, w, h,
+				    DRM_FORMAT_XRGB8888, LOCAL_DRM_FORMAT_MOD_NONE,
+				    .5, .5, .5, &data->gray_fb);
+	}
+
+	igt_plane_set_fb(primary, &data->black_fb);
+	/* reset alpha property to default */
+	reset_alpha(display, pipe);
+}
+
+static void basic_alpha(data_t *data, enum pipe pipe, igt_plane_t *plane)
+{
+	igt_display_t *display = &data->display;
+	igt_crc_t ref_crc, crc;
+	int i;
+
+	/* Testcase 1: alpha = 0.0, plane should be transparant. */
+	igt_display_commit2(display, COMMIT_ATOMIC);
+	igt_pipe_crc_start(data->pipe_crc);
+	igt_pipe_crc_get_single(data->pipe_crc, &ref_crc);
+
+	igt_plane_set_fb(plane, &data->argb_fb_0);
+
+	/* transparant fb should be transparant, no matter what.. */
+	for (i = 7; i < 256; i += 8) {
+		igt_plane_set_prop_value(plane, IGT_PLANE_ALPHA, i | (i << 8));
+		igt_display_commit2(display, COMMIT_ATOMIC);
+
+		igt_pipe_crc_drain(data->pipe_crc);
+		igt_pipe_crc_get_single(data->pipe_crc, &crc);
+		igt_assert_crc_equal(&ref_crc, &crc);
+	}
+
+	/* And test alpha = 0, should give same CRC, but doesn't on some i915 platforms. */
+	igt_plane_set_prop_value(plane, IGT_PLANE_ALPHA, 0);
+	igt_display_commit2(display, COMMIT_ATOMIC);
+
+	igt_pipe_crc_drain(data->pipe_crc);
+	igt_pipe_crc_get_single(data->pipe_crc, &crc);
+	igt_pipe_crc_stop(data->pipe_crc);
+	igt_assert_crc_equal(&ref_crc, &crc);
+}
+
+static void argb_opaque(data_t *data, enum pipe pipe, igt_plane_t *plane)
+{
+	igt_display_t *display = &data->display;
+	igt_crc_t ref_crc, crc;
+
+	/* alpha = 1.0, plane should be fully opaque, test with an opaque fb */
+	igt_plane_set_fb(plane, &data->xrgb_fb);
+	igt_display_commit2(display, COMMIT_ATOMIC);
+	igt_pipe_crc_collect_crc(data->pipe_crc, &ref_crc);
+
+	igt_plane_set_fb(plane, &data->argb_fb_100);
+	igt_display_commit2(display, COMMIT_ATOMIC);
+	igt_pipe_crc_collect_crc(data->pipe_crc, &crc);
+
+	igt_assert_crc_equal(&ref_crc, &crc);
+}
+
+static void argb_transparant(data_t *data, enum pipe pipe, igt_plane_t *plane)
+{
+	igt_display_t *display = &data->display;
+	igt_crc_t ref_crc, crc;
+
+	/* alpha = 1.0, plane should be fully opaque, test with a transparant fb */
+	igt_plane_set_fb(plane, NULL);
+	igt_display_commit2(display, COMMIT_ATOMIC);
+	igt_pipe_crc_collect_crc(data->pipe_crc, &ref_crc);
+
+	igt_plane_set_fb(plane, &data->argb_fb_0);
+	igt_display_commit2(display, COMMIT_ATOMIC);
+	igt_pipe_crc_collect_crc(data->pipe_crc, &crc);
+
+	igt_assert_crc_equal(&ref_crc, &crc);
+}
+
+static void constant_alpha_min(data_t *data, enum pipe pipe, igt_plane_t *plane)
+{
+	igt_display_t *display = &data->display;
+	igt_crc_t ref_crc, crc;
+
+	igt_plane_set_fb(plane, NULL);
+	igt_display_commit2(display, COMMIT_ATOMIC);
+	igt_pipe_crc_collect_crc(data->pipe_crc, &ref_crc);
+
+	igt_plane_set_prop_enum(plane, IGT_PLANE_PIXEL_BLEND_MODE, "None");
+	igt_plane_set_prop_value(plane, IGT_PLANE_ALPHA, 0);
+	igt_plane_set_fb(plane, &data->argb_fb_100);
+	igt_display_commit2(display, COMMIT_ATOMIC);
+	igt_pipe_crc_collect_crc(data->pipe_crc, &crc);
+	igt_assert_crc_equal(&ref_crc, &crc);
+
+	igt_plane_set_fb(plane, &data->argb_fb_0);
+	igt_display_commit2(display, COMMIT_ATOMIC);
+	igt_pipe_crc_collect_crc(data->pipe_crc, &crc);
+	igt_assert_crc_equal(&ref_crc, &crc);
+}
+
+static void constant_alpha_mid(data_t *data, enum pipe pipe, igt_plane_t *plane)
+{
+	igt_display_t *display = &data->display;
+	igt_crc_t ref_crc, crc;
+
+	if (plane->type != DRM_PLANE_TYPE_PRIMARY)
+		igt_plane_set_fb(igt_pipe_get_plane_type(&display->pipes[pipe], DRM_PLANE_TYPE_PRIMARY), &data->gray_fb);
+
+	igt_plane_set_prop_enum(plane, IGT_PLANE_PIXEL_BLEND_MODE, "None");
+	igt_plane_set_prop_value(plane, IGT_PLANE_ALPHA, 0x7fff);
+	igt_plane_set_fb(plane, &data->xrgb_fb);
+	igt_display_commit2(display, COMMIT_ATOMIC);
+	igt_pipe_crc_collect_crc(data->pipe_crc, &ref_crc);
+
+	igt_plane_set_fb(plane, &data->argb_fb_cov_0);
+	igt_display_commit2(display, COMMIT_ATOMIC);
+	igt_pipe_crc_collect_crc(data->pipe_crc, &crc);
+	igt_assert_crc_equal(&ref_crc, &crc);
+
+	igt_plane_set_fb(plane, &data->argb_fb_100);
+	igt_display_commit2(display, COMMIT_ATOMIC);
+	igt_pipe_crc_collect_crc(data->pipe_crc, &crc);
+	igt_assert_crc_equal(&ref_crc, &crc);
+}
+
+static void constant_alpha_max(data_t *data, enum pipe pipe, igt_plane_t *plane)
+{
+	igt_display_t *display = &data->display;
+	igt_crc_t ref_crc, crc;
+
+	if (plane->type != DRM_PLANE_TYPE_PRIMARY)
+		igt_plane_set_fb(igt_pipe_get_plane_type(&display->pipes[pipe], DRM_PLANE_TYPE_PRIMARY), &data->gray_fb);
+
+	igt_plane_set_fb(plane, &data->argb_fb_100);
+	igt_display_commit2(display, COMMIT_ATOMIC);
+	igt_pipe_crc_collect_crc(data->pipe_crc, &ref_crc);
+
+	igt_plane_set_prop_enum(plane, IGT_PLANE_PIXEL_BLEND_MODE, "None");
+	igt_display_commit2(display, COMMIT_ATOMIC);
+	igt_pipe_crc_collect_crc(data->pipe_crc, &crc);
+	igt_assert_crc_equal(&ref_crc, &crc);
+
+	igt_plane_set_fb(plane, &data->argb_fb_cov_0);
+	igt_display_commit2(display, COMMIT_ATOMIC);
+	igt_pipe_crc_collect_crc(data->pipe_crc, &crc);
+	igt_assert_crc_equal(&ref_crc, &crc);
+
+	igt_plane_set_fb(plane, &data->xrgb_fb);
+	igt_display_commit2(display, COMMIT_ATOMIC);
+	igt_pipe_crc_collect_crc(data->pipe_crc, &crc);
+	igt_assert_crc_equal(&ref_crc, &crc);
+
+	igt_plane_set_fb(plane, NULL);
+}
+
+static void alpha_7efc(data_t *data, enum pipe pipe, igt_plane_t *plane)
+{
+	igt_display_t *display = &data->display;
+	igt_crc_t ref_crc = {}, crc = {};
+	int i;
+
+	if (plane->type != DRM_PLANE_TYPE_PRIMARY)
+		igt_plane_set_fb(igt_pipe_get_plane_type(&display->pipes[pipe], DRM_PLANE_TYPE_PRIMARY), &data->gray_fb);
+
+	igt_pipe_crc_start(data->pipe_crc);
+
+	/* for coverage, plane alpha and fb alpha should be swappable, so swap fb and alpha */
+	for (i = 0; i < 256; i += 8) {
+		igt_plane_set_prop_value(plane, IGT_PLANE_ALPHA, ((i/2) << 8) | (i/2));
+		igt_plane_set_fb(plane, &data->argb_fb_fc);
+		igt_display_commit2(display, COMMIT_ATOMIC);
+
+		igt_pipe_crc_drain(data->pipe_crc);
+		igt_pipe_crc_get_single(data->pipe_crc, &ref_crc);
+
+		igt_plane_set_prop_value(plane, IGT_PLANE_ALPHA, (i << 8) | i);
+		igt_plane_set_fb(plane, &data->argb_fb_7e);
+		igt_display_commit2(display, COMMIT_ATOMIC);
+
+		igt_pipe_crc_drain(data->pipe_crc);
+		igt_pipe_crc_get_single(data->pipe_crc, &crc);
+		igt_assert_crc_equal(&ref_crc, &crc);
+	}
+}
+
+static void coverage_7efc(data_t *data, enum pipe pipe, igt_plane_t *plane)
+{
+	igt_display_t *display = &data->display;
+	igt_crc_t ref_crc = {}, crc = {};
+	int i;
+
+	igt_plane_set_prop_enum(plane, IGT_PLANE_PIXEL_BLEND_MODE, "Coverage");
+	igt_pipe_crc_start(data->pipe_crc);
+
+	/* for coverage, plane alpha and fb alpha should be swappable, so swap fb and alpha */
+	for (i = 0; i < 256; i += 8) {
+		igt_plane_set_prop_value(plane, IGT_PLANE_ALPHA, ((i/2) << 8) | (i/2));
+		igt_plane_set_fb(plane, &data->argb_fb_cov_fc);
+		igt_display_commit2(display, COMMIT_ATOMIC);
+
+		igt_pipe_crc_drain(data->pipe_crc);
+		igt_pipe_crc_get_single(data->pipe_crc, &ref_crc);
+
+		igt_plane_set_prop_value(plane, IGT_PLANE_ALPHA, (i << 8) | i);
+		igt_plane_set_fb(plane, &data->argb_fb_cov_7e);
+		igt_display_commit2(display, COMMIT_ATOMIC);
+
+		igt_pipe_crc_drain(data->pipe_crc);
+		igt_pipe_crc_get_single(data->pipe_crc, &crc);
+		igt_assert_crc_equal(&ref_crc, &crc);
+	}
+}
+
+static void coverage_premult_constant(data_t *data, enum pipe pipe, igt_plane_t *plane)
+{
+	igt_display_t *display = &data->display;
+	igt_crc_t ref_crc = {}, crc = {};
+
+	igt_pipe_crc_start(data->pipe_crc);
+
+	/* Set a background color on the primary fb for testing */
+	if (plane->type != DRM_PLANE_TYPE_PRIMARY)
+		igt_plane_set_fb(igt_pipe_get_plane_type(&display->pipes[pipe], DRM_PLANE_TYPE_PRIMARY), &data->gray_fb);
+
+	igt_plane_set_prop_enum(plane, IGT_PLANE_PIXEL_BLEND_MODE, "Coverage");
+	igt_plane_set_fb(plane, &data->argb_fb_cov_7e);
+	igt_display_commit2(display, COMMIT_ATOMIC);
+
+	igt_pipe_crc_drain(data->pipe_crc);
+	igt_pipe_crc_get_single(data->pipe_crc, &ref_crc);
+
+	igt_plane_set_prop_enum(plane, IGT_PLANE_PIXEL_BLEND_MODE, "Pre-multiplied");
+	igt_plane_set_fb(plane, &data->argb_fb_7e);
+	igt_display_commit2(display, COMMIT_ATOMIC);
+
+	igt_pipe_crc_drain(data->pipe_crc);
+	igt_pipe_crc_get_single(data->pipe_crc, &crc);
+	igt_assert_crc_equal(&ref_crc, &crc);
+
+	igt_plane_set_prop_enum(plane, IGT_PLANE_PIXEL_BLEND_MODE, "None");
+	igt_plane_set_prop_value(plane, IGT_PLANE_ALPHA, 0x7e7e);
+	igt_plane_set_fb(plane, &data->argb_fb_cov_7e);
+	igt_display_commit2(display, COMMIT_ATOMIC);
+
+	igt_pipe_crc_drain(data->pipe_crc);
+	igt_pipe_crc_get_single(data->pipe_crc, &crc);
+	igt_assert_crc_equal(&ref_crc, &crc);
+}
+
+static void run_test_on_pipe_planes(data_t *data, enum pipe pipe, bool blend,
+				    void(*test)(data_t *, enum pipe, igt_plane_t *))
+{
+	igt_display_t *display = &data->display;
+	igt_output_t *output = igt_get_single_output_for_pipe(display, pipe);
+	igt_plane_t *plane;
+	bool found = false;
+
+	for_each_plane_on_pipe(display, pipe, plane) {
+		if (!igt_plane_has_prop(plane, IGT_PLANE_ALPHA))
+			continue;
+
+		if (blend && !igt_plane_has_prop(plane, IGT_PLANE_PIXEL_BLEND_MODE))
+			continue;
+
+		prepare_crtc(data, output, pipe);
+
+		/* reset plane alpha properties between each plane */
+		reset_alpha(display, pipe);
+
+		found = true;
+		igt_info("Testing plane %u\n", plane->index);
+		test(data, pipe, plane);
+		igt_plane_set_fb(plane, NULL);
+	}
+
+	igt_require_f(found, "No planes with %s property found\n", blend ? "pixel blending mode" : "alpha");
+}
+
+static void run_subtests(data_t *data, enum pipe pipe)
+{
+	igt_fixture {
+		bool found = false;
+		igt_plane_t *plane;
+
+		igt_display_require_output_on_pipe(&data->display, pipe);
+		for_each_plane_on_pipe(&data->display, pipe, plane) {
+			if (!igt_plane_has_prop(plane, IGT_PLANE_ALPHA))
+				continue;
+
+			found = true;
+			break;
+		}
+
+		igt_require_f(found, "Found no plane on pipe %s with alpha blending supported\n",
+			      kmstest_pipe_name(pipe));
+	}
+
+	igt_subtest_f("pipe-%s-alpha-basic", kmstest_pipe_name(pipe))
+		run_test_on_pipe_planes(data, pipe, false, basic_alpha);
+
+	igt_subtest_f("pipe-%s-alpha-7efc", kmstest_pipe_name(pipe))
+		run_test_on_pipe_planes(data, pipe, false, alpha_7efc);
+
+	igt_subtest_f("pipe-%s-coverage-7efc", kmstest_pipe_name(pipe))
+		run_test_on_pipe_planes(data, pipe, true, coverage_7efc);
+
+	igt_subtest_f("pipe-%s-coverage-vs-premult-vs-constant", kmstest_pipe_name(pipe))
+		run_test_on_pipe_planes(data, pipe, true, coverage_premult_constant);
+
+	igt_subtest_f("pipe-%s-alpha-transparant-fb", kmstest_pipe_name(pipe))
+		run_test_on_pipe_planes(data, pipe, false, argb_transparant);
+
+	igt_subtest_f("pipe-%s-alpha-opaque-fb", kmstest_pipe_name(pipe))
+		run_test_on_pipe_planes(data, pipe, false, argb_opaque);
+
+	igt_subtest_f("pipe-%s-constant-alpha-min", kmstest_pipe_name(pipe))
+		run_test_on_pipe_planes(data, pipe, true, constant_alpha_min);
+
+	igt_subtest_f("pipe-%s-constant-alpha-mid", kmstest_pipe_name(pipe))
+		run_test_on_pipe_planes(data, pipe, true, constant_alpha_mid);
+
+	igt_subtest_f("pipe-%s-constant-alpha-max", kmstest_pipe_name(pipe))
+		run_test_on_pipe_planes(data, pipe, true, constant_alpha_max);
+}
+
+igt_main
+{
+	data_t data = {};
+	enum pipe pipe;
+
+	igt_fixture {
+		igt_skip_on_simulation();
+
+		data.gfx_fd = drm_open_driver(DRIVER_ANY);
+		igt_require_pipe_crc(data.gfx_fd);
+		igt_display_init(&data.display, data.gfx_fd);
+		igt_require(data.display.is_atomic);
+	}
+
+	for_each_pipe_static(pipe)
+		igt_subtest_group
+			run_subtests(&data, pipe);
+
+	igt_fixture
+		igt_display_fini(&data.display);
+}
diff --git a/tests/meson.build b/tests/meson.build
index 826f3c4678d0..4b2fc20bf8fe 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -176,6 +176,7 @@ test_progs = [
 	'kms_pipe_b_c_ivb',
 	'kms_pipe_crc_basic',
 	'kms_plane',
+	'kms_plane_alpha_blend',
 	'kms_plane_lowres',
 	'kms_plane_multiple',
 	'kms_plane_scaling',
-- 
2.17.1

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