From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Test the basics of drm_atomic_set_mode_for_crtc(), and in particular
verify that the function doesn't take the shortcut incorrectly.
Cc: Daniel Vetter <daniel@xxxxxxxx>
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/selftests/Makefile | 3 +-
.../gpu/drm/selftests/drm_modeset_selftests.h | 2 +
.../gpu/drm/selftests/test-drm_atomic_uapi.c | 110 ++++++++++++++++++
.../drm/selftests/test-drm_modeset_common.h | 2 +
4 files changed, 116 insertions(+), 1 deletion(-)
create mode 100644 drivers/gpu/drm/selftests/test-drm_atomic_uapi.c
diff --git a/drivers/gpu/drm/selftests/Makefile b/drivers/gpu/drm/selftests/Makefile
index d2137342b371..a5adc25bd345 100644
--- a/drivers/gpu/drm/selftests/Makefile
+++ b/drivers/gpu/drm/selftests/Makefile
@@ -1,6 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only
test-drm_modeset-y := test-drm_modeset_common.o test-drm_plane_helper.o \
test-drm_format.o test-drm_framebuffer.o \
- test-drm_damage_helper.o test-drm_dp_mst_helper.o
+ test-drm_damage_helper.o test-drm_dp_mst_helper.o \
+ test-drm_atomic_uapi.o
obj-$(CONFIG_DRM_DEBUG_SELFTEST) += test-drm_mm.o test-drm_modeset.o test-drm_cmdline_parser.o
diff --git a/drivers/gpu/drm/selftests/drm_modeset_selftests.h b/drivers/gpu/drm/selftests/drm_modeset_selftests.h
index 1898de0b4a4d..2cc4e2f43286 100644
--- a/drivers/gpu/drm/selftests/drm_modeset_selftests.h
+++ b/drivers/gpu/drm/selftests/drm_modeset_selftests.h
@@ -6,6 +6,8 @@
*
* Tests are executed in order by igt/drm_selftests_helper
*/
+selftest(atomic_set_mode_for_crtc, igt_atomic_set_mode_for_crtc)
+selftest(atomic_set_zeroed_mode_for_crtc, igt_atomic_set_zeroed_mode_for_crtc)
selftest(check_plane_state, igt_check_plane_state)
selftest(check_drm_format_block_width, igt_check_drm_format_block_width)
selftest(check_drm_format_block_height, igt_check_drm_format_block_height)
diff --git a/drivers/gpu/drm/selftests/test-drm_atomic_uapi.c b/drivers/gpu/drm/selftests/test-drm_atomic_uapi.c
new file mode 100644
index 000000000000..0f9a4d0d2541
--- /dev/null
+++ b/drivers/gpu/drm/selftests/test-drm_atomic_uapi.c
@@ -0,0 +1,110 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Test cases for the drm_atomic_uapi functions
+ */
+
+#define pr_fmt(fmt) "drm_atomic_uapi: " fmt
+
+#include <drm/drm_atomic_uapi.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_modes.h>
+
+#include "test-drm_modeset_common.h"
+
+static const struct drm_display_mode zeroed_mode;
+
+static struct drm_driver mock_driver;
+static struct drm_device mock_device;
+static struct drm_crtc mock_crtc;
+
+static void init(void)
+{
+ memset(&mock_driver, 0, sizeof(mock_driver));
+ memset(&mock_device, 0, sizeof(mock_device));
+ memset(&mock_crtc, 0, sizeof(mock_crtc));
+
+ mock_device.driver = &mock_driver;
+ mock_crtc.dev = &mock_device;
+
+ drm_mode_config_init(&mock_device);
+}
+
+static void cleanup(void)
+{
+ drm_mode_config_cleanup(&mock_device);
+}
+
+int igt_atomic_set_mode_for_crtc(void *ignored)
+{
+ static const struct drm_display_mode mode1 = {
+ DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 25175,
+ 640, 656, 752, 800, 0, 480, 490, 492, 525, 0,
+ DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC)
+ };
+ static const struct drm_display_mode mode2 = {
+ DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 65000,
+ 1024, 1048, 1184, 1344, 0, 768, 771, 777, 806, 0,
+ DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC)
+ };
+ struct drm_crtc_state crtc_state = {
+ .crtc = &mock_crtc,
+ };
+ int ret;
+
+ init();
+
+ /*
+ * Make sure drm_atomic_set_mode_for_crtc()
+ * updates the crtc state correctly.
+ */
+ ret = drm_atomic_set_mode_for_crtc(&crtc_state, &mode1);
+ FAIL(ret < 0, "Unable to set mode on crtc\n");
+ FAIL_ON(!crtc_state.enable);
+ FAIL_ON(memcmp(&crtc_state.mode, &mode1, sizeof(mode1)));
+
+ ret = drm_atomic_set_mode_for_crtc(&crtc_state, &mode2);
+ FAIL(ret < 0, "Unable to set mode on crtc\n");
+ FAIL_ON(!crtc_state.enable);
+ FAIL_ON(memcmp(&crtc_state.mode, &mode2, sizeof(mode2)));
+
+ ret = drm_atomic_set_mode_for_crtc(&crtc_state, NULL);
+ FAIL(ret < 0, "Unable to unset mode on crtc\n");
+ FAIL_ON(crtc_state.enable);
+ FAIL_ON(memcmp(&crtc_state.mode, &zeroed_mode, sizeof(zeroed_mode)));
+
+ cleanup();
+
+ return 0;
+}
+
+int igt_atomic_set_zeroed_mode_for_crtc(void *ignored)
+{
+ struct drm_crtc_state crtc_state = {
+ .crtc = &mock_crtc,
+ };
+ int ret;
+
+ init();
+
+ /*
+ * Make sure drm_atomic_set_mode_for_crtc() doesn't
+ * take the shortcut and fail to update crtc_state.enable
+ * when passed a zeroed mode (which is technically not
+ * valid, but as drm_atomic_set_mode_for_crtc() does no
+ * mode validation it should still work).
+ */
+ ret = drm_atomic_set_mode_for_crtc(&crtc_state, &zeroed_mode);
+ FAIL(ret < 0, "Unable to set mode on crtc\n");
+ FAIL_ON(!crtc_state.enable);
+ FAIL_ON(memcmp(&crtc_state.mode, &zeroed_mode, sizeof(zeroed_mode)));
+
+ ret = drm_atomic_set_mode_for_crtc(&crtc_state, NULL);
+ FAIL(ret < 0, "Unable to unset mode on crtc\n");
+ FAIL_ON(crtc_state.enable);
+ FAIL_ON(memcmp(&crtc_state.mode, &zeroed_mode, sizeof(zeroed_mode)));
+
+ cleanup();
+
+ return 0;
+}
diff --git a/drivers/gpu/drm/selftests/test-drm_modeset_common.h b/drivers/gpu/drm/selftests/test-drm_modeset_common.h
index 0fcb8bbc6a1b..a1248abf86f9 100644
--- a/drivers/gpu/drm/selftests/test-drm_modeset_common.h
+++ b/drivers/gpu/drm/selftests/test-drm_modeset_common.h
@@ -13,6 +13,8 @@
#define FAIL_ON(x) FAIL((x), "%s", "FAIL_ON(" __stringify(x) ")\n")
+int igt_atomic_set_mode_for_crtc(void *ignored);
+int igt_atomic_set_zeroed_mode_for_crtc(void *ignored);
int igt_check_plane_state(void *ignored);
int igt_check_drm_format_block_width(void *ignored);
int igt_check_drm_format_block_height(void *ignored);
--
2.23.0
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