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Message-ID: <37aa6f1b-5946-4199-91a5-ef12047f4fc0@bosc.ac.cn>
Date: Mon, 27 May 2024 23:14:13 +0800
From: Sui Jingfeng <suijingfeng@...c.ac.cn>
To: Maxime Ripard <mripard@...nel.org>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>, Jonathan Corbet <corbet@....net>,
Sandy Huang <hjc@...k-chips.com>, Heiko Stübner
<heiko@...ech.de>, Chen-Yu Tsai <wens@...e.org>,
Jernej Skrabec <jernej.skrabec@...il.com>,
Samuel Holland <samuel@...lland.org>, Andy Yan <andy.yan@...k-chips.com>
Cc: Hans Verkuil <hverkuil@...all.nl>,
Sebastian Wick <sebastian.wick@...hat.com>,
Ville Syrjälä <ville.syrjala@...ux.intel.com>,
dri-devel@...ts.freedesktop.org, linux-arm-kernel@...ts.infradead.org,
linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-media@...r.kernel.org, linux-rockchip@...ts.infradead.org,
linux-sunxi@...ts.linux.dev, Dave Stevenson
<dave.stevenson@...pberrypi.com>,
Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Subject: Re: [v15,06/29] drm/tests: Add output bpc tests
On 5/27/24 21:57, Maxime Ripard wrote:
> Now that we're tracking the output bpc count in the connector state,
> let's add a few tests to make sure it works as expected.
>
> Reviewed-by: Dave Stevenson <dave.stevenson@...pberrypi.com>
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> Signed-off-by: Maxime Ripard <mripard@...nel.org>
> ---
> drivers/gpu/drm/Kconfig | 1 +
> drivers/gpu/drm/tests/Makefile | 1 +
> drivers/gpu/drm/tests/drm_connector_test.c | 155 ++++++++
> drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c | 438 +++++++++++++++++++++
> drivers/gpu/drm/tests/drm_kunit_edid.h | 106 +++++
> 5 files changed, 701 insertions(+)
>
> diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
> index 026444eeb5c6..9703429de6b9 100644
> --- a/drivers/gpu/drm/Kconfig
> +++ b/drivers/gpu/drm/Kconfig
> @@ -77,10 +77,11 @@ config DRM_KUNIT_TEST_HELPERS
> config DRM_KUNIT_TEST
> tristate "KUnit tests for DRM" if !KUNIT_ALL_TESTS
> depends on DRM && KUNIT && MMU
> select DRM_BUDDY
> select DRM_DISPLAY_DP_HELPER
> + select DRM_DISPLAY_HDMI_STATE_HELPER
> select DRM_DISPLAY_HELPER
> select DRM_EXEC
> select DRM_EXPORT_FOR_TESTS if m
> select DRM_GEM_SHMEM_HELPER
> select DRM_KUNIT_TEST_HELPERS
> diff --git a/drivers/gpu/drm/tests/Makefile b/drivers/gpu/drm/tests/Makefile
> index d6183b3d7688..56dab563abd7 100644
> --- a/drivers/gpu/drm/tests/Makefile
> +++ b/drivers/gpu/drm/tests/Makefile
> @@ -12,10 +12,11 @@ obj-$(CONFIG_DRM_KUNIT_TEST) += \
> drm_exec_test.o \
> drm_format_helper_test.o \
> drm_format_test.o \
> drm_framebuffer_test.o \
> drm_gem_shmem_test.o \
> + drm_hdmi_state_helper_test.o \
> drm_managed_test.o \
> drm_mm_test.o \
> drm_modes_test.o \
> drm_plane_helper_test.o \
> drm_probe_helper_test.o \
> diff --git a/drivers/gpu/drm/tests/drm_connector_test.c b/drivers/gpu/drm/tests/drm_connector_test.c
> index 2661eb64a5cd..9465fa33f3b6 100644
> --- a/drivers/gpu/drm/tests/drm_connector_test.c
> +++ b/drivers/gpu/drm/tests/drm_connector_test.c
> @@ -10,10 +10,12 @@
> #include <drm/drm_drv.h>
> #include <drm/drm_kunit_helpers.h>
>
> #include <kunit/test.h>
>
> +#include "../drm_crtc_internal.h"
> +
> struct drm_connector_init_priv {
> struct drm_device drm;
> struct drm_connector connector;
> struct i2c_adapter ddc;
> };
> @@ -204,10 +206,158 @@ static void drm_test_connector_hdmi_init_null_ddc(struct kunit *test)
> NULL,
> 8);
> KUNIT_EXPECT_EQ(test, ret, 0);
> }
>
> +/*
> + * Test that the registration of a connector with an invalid maximum bpc
> + * count fails.
> + */
> +static void drm_test_connector_hdmi_init_bpc_invalid(struct kunit *test)
> +{
> + struct drm_connector_init_priv *priv = test->priv;
> + int ret;
> +
> + ret = drmm_connector_hdmi_init(&priv->drm, &priv->connector,
> + &dummy_funcs,
> + DRM_MODE_CONNECTOR_HDMIA,
> + &priv->ddc,
> + 9);
> + KUNIT_EXPECT_LT(test, ret, 0);
> +}
> +
> +/*
> + * Test that the registration of a connector with a null maximum bpc
> + * count fails.
> + */
> +static void drm_test_connector_hdmi_init_bpc_null(struct kunit *test)
> +{
> + struct drm_connector_init_priv *priv = test->priv;
> + int ret;
> +
> + ret = drmm_connector_hdmi_init(&priv->drm, &priv->connector,
> + &dummy_funcs,
> + DRM_MODE_CONNECTOR_HDMIA,
> + &priv->ddc,
> + 0);
> + KUNIT_EXPECT_LT(test, ret, 0);
> +}
> +
> +/*
> + * Test that the registration of a connector with a maximum bpc count of
> + * 8 succeeds, registers the max bpc property, but doesn't register the
> + * HDR output metadata one.
> + */
> +static void drm_test_connector_hdmi_init_bpc_8(struct kunit *test)
> +{
> + struct drm_connector_init_priv *priv = test->priv;
> + struct drm_connector_state *state;
> + struct drm_connector *connector = &priv->connector;
> + struct drm_property *prop;
> + uint64_t val;
> + int ret;
> +
> + ret = drmm_connector_hdmi_init(&priv->drm, connector,
> + &dummy_funcs,
> + DRM_MODE_CONNECTOR_HDMIA,
> + &priv->ddc,
> + 8);
> + KUNIT_EXPECT_EQ(test, ret, 0);
> +
> + prop = connector->max_bpc_property;
> + KUNIT_ASSERT_NOT_NULL(test, prop);
> + KUNIT_EXPECT_NOT_NULL(test, drm_mode_obj_find_prop_id(&connector->base, prop->base.id));
> +
> + ret = drm_object_property_get_default_value(&connector->base, prop, &val);
> + KUNIT_EXPECT_EQ(test, ret, 0);
> + KUNIT_EXPECT_EQ(test, val, 8);
> +
> + state = connector->state;
> + KUNIT_EXPECT_EQ(test, state->max_bpc, 8);
> + KUNIT_EXPECT_EQ(test, state->max_requested_bpc, 8);
> +
> + prop = priv->drm.mode_config.hdr_output_metadata_property;
> + KUNIT_ASSERT_NOT_NULL(test, prop);
> + KUNIT_EXPECT_NULL(test, drm_mode_obj_find_prop_id(&connector->base, prop->base.id));
> +}
> +
> +/*
> + * Test that the registration of a connector with a maximum bpc count of
> + * 10 succeeds and registers the max bpc and HDR output metadata
> + * properties.
> + */
> +static void drm_test_connector_hdmi_init_bpc_10(struct kunit *test)
> +{
> + struct drm_connector_init_priv *priv = test->priv;
> + struct drm_connector_state *state;
> + struct drm_connector *connector = &priv->connector;
> + struct drm_property *prop;
> + uint64_t val;
> + int ret;
> +
> + ret = drmm_connector_hdmi_init(&priv->drm, connector,
> + &dummy_funcs,
> + DRM_MODE_CONNECTOR_HDMIA,
> + &priv->ddc,
> + 10);
> + KUNIT_EXPECT_EQ(test, ret, 0);
> +
> + prop = connector->max_bpc_property;
> + KUNIT_ASSERT_NOT_NULL(test, prop);
> + KUNIT_EXPECT_NOT_NULL(test, drm_mode_obj_find_prop_id(&connector->base, prop->base.id));
> +
> + ret = drm_object_property_get_default_value(&connector->base, prop, &val);
> + KUNIT_EXPECT_EQ(test, ret, 0);
> + KUNIT_EXPECT_EQ(test, val, 10);
> +
> + state = connector->state;
> + KUNIT_EXPECT_EQ(test, state->max_bpc, 10);
> + KUNIT_EXPECT_EQ(test, state->max_requested_bpc, 10);
> +
> + prop = priv->drm.mode_config.hdr_output_metadata_property;
> + KUNIT_ASSERT_NOT_NULL(test, prop);
> + KUNIT_EXPECT_NOT_NULL(test, drm_mode_obj_find_prop_id(&connector->base, prop->base.id));
> +}
> +
> +/*
> + * Test that the registration of a connector with a maximum bpc count of
> + * 12 succeeds and registers the max bpc and HDR output metadata
> + * properties.
> + */
> +static void drm_test_connector_hdmi_init_bpc_12(struct kunit *test)
> +{
> + struct drm_connector_init_priv *priv = test->priv;
> + struct drm_connector_state *state;
> + struct drm_connector *connector = &priv->connector;
> + struct drm_property *prop;
> + uint64_t val;
> + int ret;
> +
> + ret = drmm_connector_hdmi_init(&priv->drm, connector,
> + &dummy_funcs,
> + DRM_MODE_CONNECTOR_HDMIA,
> + &priv->ddc,
> + 12);
> + KUNIT_EXPECT_EQ(test, ret, 0);
> +
> + prop = connector->max_bpc_property;
> + KUNIT_ASSERT_NOT_NULL(test, prop);
> + KUNIT_EXPECT_NOT_NULL(test, drm_mode_obj_find_prop_id(&connector->base, prop->base.id));
> +
> + ret = drm_object_property_get_default_value(&connector->base, prop, &val);
> + KUNIT_EXPECT_EQ(test, ret, 0);
> + KUNIT_EXPECT_EQ(test, val, 12);
> +
> + state = connector->state;
> + KUNIT_EXPECT_EQ(test, state->max_bpc, 12);
> + KUNIT_EXPECT_EQ(test, state->max_requested_bpc, 12);
> +
> + prop = priv->drm.mode_config.hdr_output_metadata_property;
> + KUNIT_ASSERT_NOT_NULL(test, prop);
> + KUNIT_EXPECT_NOT_NULL(test, drm_mode_obj_find_prop_id(&connector->base, prop->base.id));
> +}
> +
> /*
> * Test that the registration of an HDMI connector with an HDMI
> * connector type succeeds.
> */
> static void drm_test_connector_hdmi_init_type_valid(struct kunit *test)
> @@ -282,10 +432,15 @@ KUNIT_ARRAY_PARAM(drm_connector_hdmi_init_type_invalid,
> drm_connector_hdmi_init_type_invalid_tests,
> drm_connector_hdmi_init_type_desc);
>
> static struct kunit_case drmm_connector_hdmi_init_tests[] = {
> KUNIT_CASE(drm_test_connector_hdmi_init_valid),
> + KUNIT_CASE(drm_test_connector_hdmi_init_bpc_8),
> + KUNIT_CASE(drm_test_connector_hdmi_init_bpc_10),
> + KUNIT_CASE(drm_test_connector_hdmi_init_bpc_12),
> + KUNIT_CASE(drm_test_connector_hdmi_init_bpc_invalid),
> + KUNIT_CASE(drm_test_connector_hdmi_init_bpc_null),
> KUNIT_CASE(drm_test_connector_hdmi_init_null_ddc),
> KUNIT_CASE_PARAM(drm_test_connector_hdmi_init_type_valid,
> drm_connector_hdmi_init_type_valid_gen_params),
> KUNIT_CASE_PARAM(drm_test_connector_hdmi_init_type_invalid,
> drm_connector_hdmi_init_type_invalid_gen_params),
> diff --git a/drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c b/drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c
> new file mode 100644
> index 000000000000..3ecae50ef47f
> --- /dev/null
> +++ b/drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c
> @@ -0,0 +1,438 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +/*
> + * Kunit test for drm_hdmi_state_helper functions
> + */
> +
> +#include <drm/drm_atomic.h>
> +#include <drm/drm_atomic_state_helper.h>
> +#include <drm/drm_atomic_uapi.h>
> +#include <drm/drm_drv.h>
> +#include <drm/drm_edid.h>
> +#include <drm/drm_connector.h>
> +#include <drm/drm_fourcc.h>
> +#include <drm/drm_kunit_helpers.h>
> +#include <drm/drm_managed.h>
> +#include <drm/drm_modeset_helper_vtables.h>
> +#include <drm/drm_print.h>
> +#include <drm/drm_probe_helper.h>
> +
> +#include <drm/display/drm_hdmi_state_helper.h>
> +
> +#include "../drm_crtc_internal.h"
> +
> +#include <kunit/test.h>
> +
> +#include "drm_kunit_edid.h"
> +
> +struct drm_atomic_helper_connector_hdmi_priv {
> + struct drm_device drm;
> + struct drm_plane *plane;
> + struct drm_crtc *crtc;
> + struct drm_encoder encoder;
> + struct drm_connector connector;
> +
> + const char *current_edid;
> + size_t current_edid_len;
> +};
> +
> +#define connector_to_priv(c) \
> + container_of_const(c, struct drm_atomic_helper_connector_hdmi_priv, connector)
> +
> +static struct drm_display_mode *find_preferred_mode(struct drm_connector *connector)
> +{
> + struct drm_device *drm = connector->dev;
> + struct drm_display_mode *mode, *preferred;
> +
> + mutex_lock(&drm->mode_config.mutex);
> + preferred = list_first_entry(&connector->modes, struct drm_display_mode, head);
> + list_for_each_entry(mode, &connector->modes, head)
> + if (mode->type & DRM_MODE_TYPE_PREFERRED)
> + preferred = mode;
> + mutex_unlock(&drm->mode_config.mutex);
> +
> + return preferred;
> +}
> +
> +static int light_up_connector(struct kunit *test,
> + struct drm_device *drm,
> + struct drm_crtc *crtc,
> + struct drm_connector *connector,
> + struct drm_display_mode *mode,
> + struct drm_modeset_acquire_ctx *ctx)
> +{
> + struct drm_atomic_state *state;
> + struct drm_connector_state *conn_state;
> + struct drm_crtc_state *crtc_state;
> + int ret;
> +
> + state = drm_kunit_helper_atomic_state_alloc(test, drm, ctx);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, state);
> +
> + conn_state = drm_atomic_get_connector_state(state, connector);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, conn_state);
> +
> + ret = drm_atomic_set_crtc_for_connector(conn_state, crtc);
> + KUNIT_EXPECT_EQ(test, ret, 0);
> +
> + crtc_state = drm_atomic_get_crtc_state(state, crtc);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, crtc_state);
> +
> + ret = drm_atomic_set_mode_for_crtc(crtc_state, mode);
> + KUNIT_EXPECT_EQ(test, ret, 0);
> +
> + crtc_state->enable = true;
> + crtc_state->active = true;
> +
> + ret = drm_atomic_commit(state);
> + KUNIT_ASSERT_EQ(test, ret, 0);
> +
> + return 0;
> +}
> +
> +static int set_connector_edid(struct kunit *test, struct drm_connector *connector,
> + const char *edid, size_t edid_len)
> +{
> + struct drm_atomic_helper_connector_hdmi_priv *priv =
> + connector_to_priv(connector);
> + struct drm_device *drm = connector->dev;
> + int ret;
> +
> + priv->current_edid = edid;
> + priv->current_edid_len = edid_len;
> +
> + mutex_lock(&drm->mode_config.mutex);
> + ret = connector->funcs->fill_modes(connector, 4096, 4096);
> + mutex_unlock(&drm->mode_config.mutex);
> + KUNIT_ASSERT_GT(test, ret, 0);
> +
> + return 0;
> +}
> +
> +static int dummy_connector_get_modes(struct drm_connector *connector)
> +{
> + struct drm_atomic_helper_connector_hdmi_priv *priv =
> + connector_to_priv(connector);
> + const struct drm_edid *edid;
> + unsigned int num_modes;
> +
> + edid = drm_edid_alloc(priv->current_edid, priv->current_edid_len);
> + if (!edid)
> + return -EINVAL;
> +
> + drm_edid_connector_update(connector, edid);
> + num_modes = drm_edid_connector_add_modes(connector);
> +
> + drm_edid_free(edid);
> +
> + return num_modes;
> +}
> +
> +static const struct drm_connector_helper_funcs dummy_connector_helper_funcs = {
> + .atomic_check = drm_atomic_helper_connector_hdmi_check,
> + .get_modes = dummy_connector_get_modes,
> +};
> +
> +static void dummy_hdmi_connector_reset(struct drm_connector *connector)
> +{
> + drm_atomic_helper_connector_reset(connector);
> + __drm_atomic_helper_connector_hdmi_reset(connector, connector->state);
> +}
> +
> +static const struct drm_connector_funcs dummy_connector_funcs = {
> + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
> + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
> + .fill_modes = drm_helper_probe_single_connector_modes,
> + .reset = dummy_hdmi_connector_reset,
> +};
> +
> +static
> +struct drm_atomic_helper_connector_hdmi_priv *
> +drm_atomic_helper_connector_hdmi_init(struct kunit *test,
> + unsigned int max_bpc)
> +{
> + struct drm_atomic_helper_connector_hdmi_priv *priv;
> + struct drm_connector *conn;
> + struct drm_encoder *enc;
> + struct drm_device *drm;
> + struct device *dev;
> + int ret;
> +
> + dev = drm_kunit_helper_alloc_device(test);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, dev);
> +
> + priv = drm_kunit_helper_alloc_drm_device(test, dev,
> + struct drm_atomic_helper_connector_hdmi_priv, drm,
> + DRIVER_MODESET | DRIVER_ATOMIC);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv);
> + test->priv = priv;
> +
> + drm = &priv->drm;
> + priv->plane = drm_kunit_helper_create_primary_plane(test, drm,
> + NULL,
> + NULL,
> + NULL, 0,
> + NULL);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv->plane);
> +
> + priv->crtc = drm_kunit_helper_create_crtc(test, drm,
> + priv->plane, NULL,
> + NULL,
> + NULL);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv->crtc);
> +
> + enc = &priv->encoder;
> + ret = drmm_encoder_init(drm, enc, NULL, DRM_MODE_ENCODER_TMDS, NULL);
> + KUNIT_ASSERT_EQ(test, ret, 0);
> +
> + enc->possible_crtcs = drm_crtc_mask(priv->crtc);
> +
> + conn = &priv->connector;
> + ret = drmm_connector_hdmi_init(drm, conn,
> + &dummy_connector_funcs,
> + DRM_MODE_CONNECTOR_HDMIA,
> + NULL,
> + max_bpc);
> + KUNIT_ASSERT_EQ(test, ret, 0);
> +
> + drm_connector_helper_add(conn, &dummy_connector_helper_funcs);
> + drm_connector_attach_encoder(conn, enc);
> +
> + drm_mode_config_reset(drm);
> +
> + ret = set_connector_edid(test, conn,
> + test_edid_hdmi_1080p_rgb_max_200mhz,
> + ARRAY_SIZE(test_edid_hdmi_1080p_rgb_max_200mhz));
> + KUNIT_ASSERT_EQ(test, ret, 0);
> +
> + return priv;
> +}
> +
> +/*
> + * Test that if we change the maximum bpc property to a different value,
> + * we trigger a mode change on the connector's CRTC, which will in turn
> + * disable/enable the connector.
> + */
> +static void drm_test_check_output_bpc_crtc_mode_changed(struct kunit *test)
> +{
> + struct drm_atomic_helper_connector_hdmi_priv *priv;
> + struct drm_modeset_acquire_ctx *ctx;
> + struct drm_connector_state *old_conn_state;
> + struct drm_connector_state *new_conn_state;
> + struct drm_crtc_state *crtc_state;
> + struct drm_atomic_state *state;
> + struct drm_display_mode *preferred;
> + struct drm_connector *conn;
> + struct drm_device *drm;
> + struct drm_crtc *crtc;
> + int ret;
> +
> + priv = drm_atomic_helper_connector_hdmi_init(test, 10);
> + KUNIT_ASSERT_NOT_NULL(test, priv);
> +
> + ctx = drm_kunit_helper_acquire_ctx_alloc(test);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
> +
> + conn = &priv->connector;
> + preferred = find_preferred_mode(conn);
> + KUNIT_ASSERT_NOT_NULL(test, preferred);
> +
> + drm = &priv->drm;
> + crtc = priv->crtc;
> + ret = light_up_connector(test, drm, crtc, conn, preferred, ctx);
> + KUNIT_ASSERT_EQ(test, ret, 0);
> +
> + state = drm_kunit_helper_atomic_state_alloc(test, drm, ctx);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, state);
> +
> + new_conn_state = drm_atomic_get_connector_state(state, conn);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, new_conn_state);
> +
> + old_conn_state = drm_atomic_get_old_connector_state(state, conn);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, old_conn_state);
> +
> + new_conn_state->hdmi.output_bpc = 8;
> +
> + KUNIT_ASSERT_NE(test,
> + old_conn_state->hdmi.output_bpc,
> + new_conn_state->hdmi.output_bpc);
> +
> + ret = drm_atomic_check_only(state);
> + KUNIT_ASSERT_EQ(test, ret, 0);
> +
> + old_conn_state = drm_atomic_get_old_connector_state(state, conn);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, old_conn_state);
> +
> + new_conn_state = drm_atomic_get_new_connector_state(state, conn);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, new_conn_state);
> +
> + KUNIT_ASSERT_NE(test,
> + old_conn_state->hdmi.output_bpc,
> + new_conn_state->hdmi.output_bpc);
> +
> + crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, crtc_state);
> + KUNIT_EXPECT_TRUE(test, crtc_state->mode_changed);
> +}
> +
> +/*
> + * Test that if we set the output bpc property to the same value, we
> + * don't trigger a mode change on the connector's CRTC and leave the
> + * connector unaffected.
> + */
> +static void drm_test_check_output_bpc_crtc_mode_not_changed(struct kunit *test)
> +{
> + struct drm_atomic_helper_connector_hdmi_priv *priv;
> + struct drm_modeset_acquire_ctx *ctx;
> + struct drm_connector_state *old_conn_state;
> + struct drm_connector_state *new_conn_state;
> + struct drm_crtc_state *crtc_state;
> + struct drm_atomic_state *state;
> + struct drm_display_mode *preferred;
> + struct drm_connector *conn;
> + struct drm_device *drm;
> + struct drm_crtc *crtc;
> + int ret;
> +
> + priv = drm_atomic_helper_connector_hdmi_init(test, 10);
> + KUNIT_ASSERT_NOT_NULL(test, priv);
> +
> + ctx = drm_kunit_helper_acquire_ctx_alloc(test);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
> +
> + conn = &priv->connector;
> + preferred = find_preferred_mode(conn);
> + KUNIT_ASSERT_NOT_NULL(test, preferred);
> +
> + drm = &priv->drm;
> + crtc = priv->crtc;
> + ret = light_up_connector(test, drm, crtc, conn, preferred, ctx);
> + KUNIT_ASSERT_EQ(test, ret, 0);
> +
> + state = drm_kunit_helper_atomic_state_alloc(test, drm, ctx);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, state);
> +
> + new_conn_state = drm_atomic_get_connector_state(state, conn);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, new_conn_state);
> +
> + old_conn_state = drm_atomic_get_old_connector_state(state, conn);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, old_conn_state);
> +
> + KUNIT_ASSERT_EQ(test,
> + new_conn_state->hdmi.output_bpc,
> + old_conn_state->hdmi.output_bpc);
> +
> + ret = drm_atomic_check_only(state);
> + KUNIT_ASSERT_EQ(test, ret, 0);
> +
> + old_conn_state = drm_atomic_get_old_connector_state(state, conn);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, old_conn_state);
> +
> + new_conn_state = drm_atomic_get_new_connector_state(state, conn);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, new_conn_state);
> +
> + KUNIT_EXPECT_EQ(test,
> + old_conn_state->hdmi.output_bpc,
> + new_conn_state->hdmi.output_bpc);
> +
> + crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, crtc_state);
> + KUNIT_EXPECT_FALSE(test, crtc_state->mode_changed);
> +}
> +
> +static struct kunit_case drm_atomic_helper_connector_hdmi_check_tests[] = {
> + KUNIT_CASE(drm_test_check_output_bpc_crtc_mode_changed),
> + KUNIT_CASE(drm_test_check_output_bpc_crtc_mode_not_changed),
> + { }
> +};
> +
> +static struct kunit_suite drm_atomic_helper_connector_hdmi_check_test_suite = {
> + .name = "drm_atomic_helper_connector_hdmi_check",
> + .test_cases = drm_atomic_helper_connector_hdmi_check_tests,
> +};
> +
> +/*
> + * Test that if the connector was initialised with a maximum bpc of 8,
> + * the value of the max_bpc and max_requested_bpc properties out of
> + * reset are also set to 8, and output_bpc is set to 0 and will be
> + * filled at atomic_check time.
> + */
> +static void drm_test_check_bpc_8_value(struct kunit *test)
> +{
> + struct drm_atomic_helper_connector_hdmi_priv *priv;
> + struct drm_connector_state *conn_state;
> + struct drm_connector *conn;
> +
> + priv = drm_atomic_helper_connector_hdmi_init(test, 8);
> + KUNIT_ASSERT_NOT_NULL(test, priv);
> +
> + conn = &priv->connector;
> + conn_state = conn->state;
> + KUNIT_EXPECT_EQ(test, conn_state->max_bpc, 8);
> + KUNIT_EXPECT_EQ(test, conn_state->max_requested_bpc, 8);
> + KUNIT_EXPECT_EQ(test, conn_state->hdmi.output_bpc, 0);
> +}
> +
> +/*
> + * Test that if the connector was initialised with a maximum bpc of 10,
> + * the value of the max_bpc and max_requested_bpc properties out of
> + * reset are also set to 10, and output_bpc is set to 0 and will be
> + * filled at atomic_check time.
> + */
> +static void drm_test_check_bpc_10_value(struct kunit *test)
> +{
> + struct drm_atomic_helper_connector_hdmi_priv *priv;
> + struct drm_connector_state *conn_state;
> + struct drm_connector *conn;
> +
> + priv = drm_atomic_helper_connector_hdmi_init(test, 10);
> + KUNIT_ASSERT_NOT_NULL(test, priv);
> +
> + conn = &priv->connector;
> + conn_state = conn->state;
> + KUNIT_EXPECT_EQ(test, conn_state->max_bpc, 10);
> + KUNIT_EXPECT_EQ(test, conn_state->max_requested_bpc, 10);
> + KUNIT_EXPECT_EQ(test, conn_state->hdmi.output_bpc, 0);
> +}
> +
> +/*
> + * Test that if the connector was initialised with a maximum bpc of 12,
> + * the value of the max_bpc and max_requested_bpc properties out of
> + * reset are also set to 12, and output_bpc is set to 0 and will be
> + * filled at atomic_check time.
> + */
> +static void drm_test_check_bpc_12_value(struct kunit *test)
> +{
> + struct drm_atomic_helper_connector_hdmi_priv *priv;
> + struct drm_connector_state *conn_state;
> + struct drm_connector *conn;
> +
> + priv = drm_atomic_helper_connector_hdmi_init(test, 12);
> + KUNIT_ASSERT_NOT_NULL(test, priv);
> +
> + conn = &priv->connector;
> + conn_state = conn->state;
> + KUNIT_EXPECT_EQ(test, conn_state->max_bpc, 12);
> + KUNIT_EXPECT_EQ(test, conn_state->max_requested_bpc, 12);
> + KUNIT_EXPECT_EQ(test, conn_state->hdmi.output_bpc, 0);
> +}
> +
> +static struct kunit_case drm_atomic_helper_connector_hdmi_reset_tests[] = {
> + KUNIT_CASE(drm_test_check_bpc_8_value),
> + KUNIT_CASE(drm_test_check_bpc_10_value),
> + KUNIT_CASE(drm_test_check_bpc_12_value),
> + { }
> +};
> +
> +static struct kunit_suite drm_atomic_helper_connector_hdmi_reset_test_suite = {
> + .name = "drm_atomic_helper_connector_hdmi_reset",
> + .test_cases = drm_atomic_helper_connector_hdmi_reset_tests,
> +};
> +
> +kunit_test_suites(
> + &drm_atomic_helper_connector_hdmi_check_test_suite,
> + &drm_atomic_helper_connector_hdmi_reset_test_suite,
> +);
> +
> +MODULE_AUTHOR("Maxime Ripard <mripard@...nel.org>");
> +MODULE_LICENSE("GPL");
> diff --git a/drivers/gpu/drm/tests/drm_kunit_edid.h b/drivers/gpu/drm/tests/drm_kunit_edid.h
> new file mode 100644
> index 000000000000..0366dd29c820
> --- /dev/null
> +++ b/drivers/gpu/drm/tests/drm_kunit_edid.h
> @@ -0,0 +1,106 @@
> +#ifndef DRM_KUNIT_EDID_H_
> +#define DRM_KUNIT_EDID_H_
> +
> +/*
> + * edid-decode (hex):
> + *
> + * 00 ff ff ff ff ff ff 00 31 d8 2a 00 00 00 00 00
> + * 00 21 01 03 81 a0 5a 78 02 00 00 00 00 00 00 00
> + * 00 00 00 20 00 00 01 01 01 01 01 01 01 01 01 01
> + * 01 01 01 01 01 01 02 3a 80 18 71 38 2d 40 58 2c
> + * 45 00 40 84 63 00 00 1e 00 00 00 fc 00 54 65 73
> + * 74 20 45 44 49 44 0a 20 20 20 00 00 00 fd 00 32
> + * 46 1e 46 0f 00 0a 20 20 20 20 20 20 00 00 00 10
> + * 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 92
> + *
> + * 02 03 1b 81 e3 05 00 20 41 10 e2 00 4a 6d 03 0c
> + * 00 12 34 00 28 20 00 00 00 00 00 00 00 00 00 00
> + * 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> + * 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> + * 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> + * 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> + * 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> + * 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 d0
> + *
> + * ----------------
> + *
> + * Block 0, Base EDID:
> + * EDID Structure Version & Revision: 1.3
> + * Vendor & Product Identification:
> + * Manufacturer: LNX
> + * Model: 42
> + * Made in: 2023
> + * Basic Display Parameters & Features:
> + * Digital display
> + * DFP 1.x compatible TMDS
> + * Maximum image size: 160 cm x 90 cm
> + * Gamma: 2.20
> + * Monochrome or grayscale display
> + * First detailed timing is the preferred timing
> + * Color Characteristics:
> + * Red : 0.0000, 0.0000
> + * Green: 0.0000, 0.0000
> + * Blue : 0.0000, 0.0000
> + * White: 0.0000, 0.0000
> + * Established Timings I & II:
> + * DMT 0x04: 640x480 59.940476 Hz 4:3 31.469 kHz 25.175000 MHz
> + * Standard Timings: none
> + * Detailed Timing Descriptors:
> + * DTD 1: 1920x1080 60.000000 Hz 16:9 67.500 kHz 148.500000 MHz (1600 mm x 900 mm)
> + * Hfront 88 Hsync 44 Hback 148 Hpol P
> + * Vfront 4 Vsync 5 Vback 36 Vpol P
> + * Display Product Name: 'Test EDID'
> + * Display Range Limits:
> + * Monitor ranges (GTF): 50-70 Hz V, 30-70 kHz H, max dotclock 150 MHz
> + * Dummy Descriptor:
> + * Extension blocks: 1
> + * Checksum: 0x92
> + *
> + * ----------------
> + *
> + * Block 1, CTA-861 Extension Block:
> + * Revision: 3
> + * Underscans IT Video Formats by default
> + * Native detailed modes: 1
> + * Colorimetry Data Block:
> + * sRGB
> + * Video Data Block:
> + * VIC 16: 1920x1080 60.000000 Hz 16:9 67.500 kHz 148.500000 MHz
> + * Video Capability Data Block:
> + * YCbCr quantization: No Data
> + * RGB quantization: Selectable (via AVI Q)
> + * PT scan behavior: No Data
> + * IT scan behavior: Always Underscanned
> + * CE scan behavior: Always Underscanned
> + * Vendor-Specific Data Block (HDMI), OUI 00-0C-03:
> + * Source physical address: 1.2.3.4
> + * Maximum TMDS clock: 200 MHz
> + * Extended HDMI video details:
> + * Checksum: 0xd0 Unused space in Extension Block: 100 bytes
> + */
> +static const unsigned char test_edid_hdmi_1080p_rgb_max_200mhz[] = {
> + 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x31, 0xd8, 0x2a, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x21, 0x01, 0x03, 0x81, 0xa0, 0x5a, 0x78,
> + 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20,
> + 0x00, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
> + 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38,
> + 0x2d, 0x40, 0x58, 0x2c, 0x45, 0x00, 0x40, 0x84, 0x63, 0x00, 0x00, 0x1e,
> + 0x00, 0x00, 0x00, 0xfc, 0x00, 0x54, 0x65, 0x73, 0x74, 0x20, 0x45, 0x44,
> + 0x49, 0x44, 0x0a, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x32,
> + 0x46, 0x00, 0x00, 0xc4, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
> + 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x41, 0x02, 0x03, 0x1b, 0x81,
> + 0xe3, 0x05, 0x00, 0x20, 0x41, 0x10, 0xe2, 0x00, 0x4a, 0x6d, 0x03, 0x0c,
> + 0x00, 0x12, 0x34, 0x00, 0x28, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0xd0
> +};
> +
> +#endif // DRM_KUNIT_EDID_H_
--
Best regards
Sui Jingfeng
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