Just like BPC, we'll add support for automatic selection of the output
format for HDMI connectors.

Let's add the needed defaults and fields for now.

Signed-off-by: Maxime Ripard <mrip...@kernel.org>
---
 drivers/gpu/drm/drm_atomic.c                       |   2 +
 drivers/gpu/drm/drm_atomic_state_helper.c          |   3 +-
 drivers/gpu/drm/drm_connector.c                    |  31 ++++++
 .../gpu/drm/tests/drm_atomic_state_helper_test.c   |  90 ++++++++++++++---
 drivers/gpu/drm/tests/drm_connector_test.c         | 109 ++++++++++++++++++++-
 include/drm/drm_connector.h                        |  19 ++++
 6 files changed, 238 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index 76c63ed04af4..7aaa2a4d70d9 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -1148,6 +1148,8 @@ static void drm_atomic_connector_print_state(struct 
drm_printer *p,
                           
drm_hdmi_connector_get_broadcast_rgb_name(state->hdmi.broadcast_rgb));
                drm_printf(p, "\tis_full_range=%c\n", state->hdmi.is_full_range 
? 'y' : 'n');
                drm_printf(p, "\toutput_bpc=%u\n", state->hdmi.output_bpc);
+               drm_printf(p, "\toutput_format=%s\n",
+                          
drm_hdmi_connector_get_output_format_name(state->hdmi.output_format));
        }
 
        if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)
diff --git a/drivers/gpu/drm/drm_atomic_state_helper.c 
b/drivers/gpu/drm/drm_atomic_state_helper.c
index 883bdc0349c0..92e1b087c3d0 100644
--- a/drivers/gpu/drm/drm_atomic_state_helper.c
+++ b/drivers/gpu/drm/drm_atomic_state_helper.c
@@ -705,7 +705,8 @@ int drm_atomic_helper_connector_hdmi_check(struct 
drm_connector *connector,
        new_state->hdmi.is_full_range = hdmi_is_full_range(connector, 
new_state);
 
        if (old_state->hdmi.broadcast_rgb != new_state->hdmi.broadcast_rgb ||
-           old_state->hdmi.output_bpc != new_state->hdmi.output_bpc) {
+           old_state->hdmi.output_bpc != new_state->hdmi.output_bpc ||
+           old_state->hdmi.output_format != new_state->hdmi.output_format) {
                struct drm_crtc *crtc = new_state->crtc;
                struct drm_crtc_state *crtc_state;
 
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index 139ac3d8160c..a72f38b6dbc8 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -459,6 +459,7 @@ EXPORT_SYMBOL(drmm_connector_init);
  * @funcs: callbacks for this connector
  * @connector_type: user visible type of the connector
  * @ddc: optional pointer to the associated ddc adapter
+ * @supported_formats: Bitmask of @hdmi_colorspace listing supported output 
formats
  * @max_bpc: Maximum bits per char the HDMI connector supports
  *
  * Initialises a preallocated HDMI connector. Connectors can be
@@ -477,6 +478,7 @@ int drmm_connector_hdmi_init(struct drm_device *dev,
                             const struct drm_connector_funcs *funcs,
                             int connector_type,
                             struct i2c_adapter *ddc,
+                            unsigned long supported_formats,
                             unsigned int max_bpc)
 {
        int ret;
@@ -485,6 +487,9 @@ int drmm_connector_hdmi_init(struct drm_device *dev,
              connector_type == DRM_MODE_CONNECTOR_HDMIB))
                return -EINVAL;
 
+       if (!supported_formats || !(supported_formats & 
BIT(HDMI_COLORSPACE_RGB)))
+               return -EINVAL;
+
        if (!(max_bpc == 8 || max_bpc == 10 || max_bpc == 12))
                return -EINVAL;
 
@@ -492,6 +497,8 @@ int drmm_connector_hdmi_init(struct drm_device *dev,
        if (ret)
                return ret;
 
+       connector->hdmi.supported_formats = supported_formats;
+
        /*
         * drm_connector_attach_max_bpc_property() requires the
         * connector to have a state.
@@ -1224,6 +1231,30 @@ drm_hdmi_connector_get_broadcast_rgb_name(enum 
drm_hdmi_broadcast_rgb broadcast_
 }
 EXPORT_SYMBOL(drm_hdmi_connector_get_broadcast_rgb_name);
 
+static const char * const output_format_str[] = {
+       [HDMI_COLORSPACE_RGB]           = "RGB",
+       [HDMI_COLORSPACE_YUV420]        = "YUV 4:2:0",
+       [HDMI_COLORSPACE_YUV422]        = "YUV 4:2:2",
+       [HDMI_COLORSPACE_YUV444]        = "YUV 4:4:4",
+};
+
+/*
+ * drm_hdmi_connector_get_output_format_name() - Return a string for HDMI 
connector output format
+ * @fmt: Output format to compute name of
+ *
+ * Returns: the name of the output format, or NULL if the type is not
+ * valid.
+ */
+const char *
+drm_hdmi_connector_get_output_format_name(enum hdmi_colorspace fmt)
+{
+       if (fmt >= ARRAY_SIZE(output_format_str))
+               return NULL;
+
+       return output_format_str[fmt];
+}
+EXPORT_SYMBOL(drm_hdmi_connector_get_output_format_name);
+
 /**
  * DOC: standard connector properties
  *
diff --git a/drivers/gpu/drm/tests/drm_atomic_state_helper_test.c 
b/drivers/gpu/drm/tests/drm_atomic_state_helper_test.c
index a1b0e6914cf8..4e2ec436987b 100644
--- a/drivers/gpu/drm/tests/drm_atomic_state_helper_test.c
+++ b/drivers/gpu/drm/tests/drm_atomic_state_helper_test.c
@@ -147,6 +147,7 @@ static const struct drm_connector_funcs 
dummy_connector_funcs = {
 static
 struct drm_atomic_helper_connector_hdmi_priv *
 drm_atomic_helper_connector_hdmi_init(struct kunit *test,
+                                     unsigned int formats,
                                      unsigned int max_bpc)
 {
        struct drm_atomic_helper_connector_hdmi_priv *priv;
@@ -190,6 +191,7 @@ drm_atomic_helper_connector_hdmi_init(struct kunit *test,
                                       &dummy_connector_funcs,
                                       DRM_MODE_CONNECTOR_HDMIA,
                                       NULL,
+                                      formats,
                                       max_bpc);
        KUNIT_ASSERT_EQ(test, ret, 0);
 
@@ -225,7 +227,9 @@ static void 
drm_test_check_broadcast_rgb_crtc_mode_changed(struct kunit *test)
        struct drm_crtc *crtc;
        int ret;
 
-       priv = drm_atomic_helper_connector_hdmi_init(test, 8);
+       priv = drm_atomic_helper_connector_hdmi_init(test,
+                                                    BIT(HDMI_COLORSPACE_RGB),
+                                                    8);
        KUNIT_ASSERT_NOT_NULL(test, priv);
 
        ctx = drm_kunit_helper_acquire_ctx_alloc(test);
@@ -286,7 +290,9 @@ static void 
drm_test_check_broadcast_rgb_crtc_mode_not_changed(struct kunit *tes
        struct drm_crtc *crtc;
        int ret;
 
-       priv = drm_atomic_helper_connector_hdmi_init(test, 8);
+       priv = drm_atomic_helper_connector_hdmi_init(test,
+                                                    BIT(HDMI_COLORSPACE_RGB),
+                                                    8);
        KUNIT_ASSERT_NOT_NULL(test, priv);
 
        ctx = drm_kunit_helper_acquire_ctx_alloc(test);
@@ -347,7 +353,9 @@ static void 
drm_test_check_broadcast_rgb_auto_cea_mode(struct kunit *test)
        struct drm_crtc *crtc;
        int ret;
 
-       priv = drm_atomic_helper_connector_hdmi_init(test, 8);
+       priv = drm_atomic_helper_connector_hdmi_init(test,
+                                                    BIT(HDMI_COLORSPACE_RGB),
+                                                    8);
        KUNIT_ASSERT_NOT_NULL(test, priv);
 
        conn = &priv->connector;
@@ -401,7 +409,9 @@ static void 
drm_test_check_broadcast_rgb_auto_cea_mode_vic_1(struct kunit *test)
        struct drm_crtc *crtc;
        int ret;
 
-       priv = drm_atomic_helper_connector_hdmi_init(test, 8);
+       priv = drm_atomic_helper_connector_hdmi_init(test,
+                                                    BIT(HDMI_COLORSPACE_RGB),
+                                                    8);
        KUNIT_ASSERT_NOT_NULL(test, priv);
 
        conn = &priv->connector;
@@ -454,7 +464,9 @@ static void 
drm_test_check_broadcast_rgb_full_cea_mode(struct kunit *test)
        struct drm_crtc *crtc;
        int ret;
 
-       priv = drm_atomic_helper_connector_hdmi_init(test, 8);
+       priv = drm_atomic_helper_connector_hdmi_init(test,
+                                                    BIT(HDMI_COLORSPACE_RGB),
+                                                    8);
        KUNIT_ASSERT_NOT_NULL(test, priv);
 
        conn = &priv->connector;
@@ -510,7 +522,9 @@ static void 
drm_test_check_broadcast_rgb_full_cea_mode_vic_1(struct kunit *test)
        struct drm_crtc *crtc;
        int ret;
 
-       priv = drm_atomic_helper_connector_hdmi_init(test, 8);
+       priv = drm_atomic_helper_connector_hdmi_init(test,
+                                                    BIT(HDMI_COLORSPACE_RGB),
+                                                    8);
        KUNIT_ASSERT_NOT_NULL(test, priv);
 
        conn = &priv->connector;
@@ -565,7 +579,9 @@ static void 
drm_test_check_broadcast_rgb_limited_cea_mode(struct kunit *test)
        struct drm_crtc *crtc;
        int ret;
 
-       priv = drm_atomic_helper_connector_hdmi_init(test, 8);
+       priv = drm_atomic_helper_connector_hdmi_init(test,
+                                                    BIT(HDMI_COLORSPACE_RGB),
+                                                    8);
        KUNIT_ASSERT_NOT_NULL(test, priv);
 
        conn = &priv->connector;
@@ -621,7 +637,9 @@ static void 
drm_test_check_broadcast_rgb_limited_cea_mode_vic_1(struct kunit *te
        struct drm_crtc *crtc;
        int ret;
 
-       priv = drm_atomic_helper_connector_hdmi_init(test, 8);
+       priv = drm_atomic_helper_connector_hdmi_init(test,
+                                                    BIT(HDMI_COLORSPACE_RGB),
+                                                    8);
        KUNIT_ASSERT_NOT_NULL(test, priv);
 
        conn = &priv->connector;
@@ -678,7 +696,9 @@ static void 
drm_test_check_output_bpc_crtc_mode_changed(struct kunit *test)
        struct drm_crtc *crtc;
        int ret;
 
-       priv = drm_atomic_helper_connector_hdmi_init(test, 10);
+       priv = drm_atomic_helper_connector_hdmi_init(test,
+                                                    BIT(HDMI_COLORSPACE_RGB),
+                                                    10);
        KUNIT_ASSERT_NOT_NULL(test, priv);
 
        ctx = drm_kunit_helper_acquire_ctx_alloc(test);
@@ -745,7 +765,9 @@ static void 
drm_test_check_output_bpc_crtc_mode_not_changed(struct kunit *test)
        struct drm_crtc *crtc;
        int ret;
 
-       priv = drm_atomic_helper_connector_hdmi_init(test, 10);
+       priv = drm_atomic_helper_connector_hdmi_init(test,
+                                                    BIT(HDMI_COLORSPACE_RGB),
+                                                    10);
        KUNIT_ASSERT_NOT_NULL(test, priv);
 
        ctx = drm_kunit_helper_acquire_ctx_alloc(test);
@@ -802,6 +824,15 @@ static struct kunit_case 
drm_atomic_helper_connector_hdmi_check_tests[] = {
        KUNIT_CASE(drm_test_check_broadcast_rgb_crtc_mode_not_changed),
        KUNIT_CASE(drm_test_check_output_bpc_crtc_mode_changed),
        KUNIT_CASE(drm_test_check_output_bpc_crtc_mode_not_changed),
+       /*
+        * TODO: We should have tests to check that a change in the
+        * format triggers a CRTC mode change just like we do for the
+        * RGB Quantization and BPC.
+        *
+        * However, we don't have any way to control which format gets
+        * picked up aside from changing the BPC or mode which would
+        * already trigger a mode change.
+        */
        { }
 };
 
@@ -820,7 +851,9 @@ static void drm_test_check_broadcast_rgb_value(struct kunit 
*test)
        struct drm_connector_state *conn_state;
        struct drm_connector *conn;
 
-       priv = drm_atomic_helper_connector_hdmi_init(test, 8);
+       priv = drm_atomic_helper_connector_hdmi_init(test,
+                                                    BIT(HDMI_COLORSPACE_RGB),
+                                                    8);
        KUNIT_ASSERT_NOT_NULL(test, priv);
 
        conn = &priv->connector;
@@ -840,7 +873,9 @@ static void drm_test_check_bpc_8_value(struct kunit *test)
        struct drm_connector_state *conn_state;
        struct drm_connector *conn;
 
-       priv = drm_atomic_helper_connector_hdmi_init(test, 8);
+       priv = drm_atomic_helper_connector_hdmi_init(test,
+                                                    BIT(HDMI_COLORSPACE_RGB),
+                                                    8);
        KUNIT_ASSERT_NOT_NULL(test, priv);
 
        conn = &priv->connector;
@@ -862,7 +897,9 @@ static void drm_test_check_bpc_10_value(struct kunit *test)
        struct drm_connector_state *conn_state;
        struct drm_connector *conn;
 
-       priv = drm_atomic_helper_connector_hdmi_init(test, 10);
+       priv = drm_atomic_helper_connector_hdmi_init(test,
+                                                    BIT(HDMI_COLORSPACE_RGB),
+                                                    10);
        KUNIT_ASSERT_NOT_NULL(test, priv);
 
        conn = &priv->connector;
@@ -884,7 +921,9 @@ static void drm_test_check_bpc_12_value(struct kunit *test)
        struct drm_connector_state *conn_state;
        struct drm_connector *conn;
 
-       priv = drm_atomic_helper_connector_hdmi_init(test, 12);
+       priv = drm_atomic_helper_connector_hdmi_init(test,
+                                                    BIT(HDMI_COLORSPACE_RGB),
+                                                    12);
        KUNIT_ASSERT_NOT_NULL(test, priv);
 
        conn = &priv->connector;
@@ -894,11 +933,34 @@ static void drm_test_check_bpc_12_value(struct kunit 
*test)
        KUNIT_EXPECT_EQ(test, conn_state->hdmi.output_bpc, 0);
 }
 
+/*
+ * Test that the value of the output format property out of reset is set
+ * to RGB, even if the driver supports more than that.
+ */
+static void drm_test_check_format_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,
+                                                    BIT(HDMI_COLORSPACE_RGB) |
+                                                    
BIT(HDMI_COLORSPACE_YUV422) |
+                                                    
BIT(HDMI_COLORSPACE_YUV444),
+                                                    8);
+       KUNIT_ASSERT_NOT_NULL(test, priv);
+
+       conn = &priv->connector;
+       conn_state = conn->state;
+       KUNIT_EXPECT_EQ(test, conn_state->hdmi.output_format, 
HDMI_COLORSPACE_RGB);
+}
+
 static struct kunit_case drm_atomic_helper_connector_hdmi_reset_tests[] = {
        KUNIT_CASE(drm_test_check_broadcast_rgb_value),
        KUNIT_CASE(drm_test_check_bpc_8_value),
        KUNIT_CASE(drm_test_check_bpc_10_value),
        KUNIT_CASE(drm_test_check_bpc_12_value),
+       KUNIT_CASE(drm_test_check_format_value),
        { }
 };
 
diff --git a/drivers/gpu/drm/tests/drm_connector_test.c 
b/drivers/gpu/drm/tests/drm_connector_test.c
index fef7d53d34d4..fa6fe8084107 100644
--- a/drivers/gpu/drm/tests/drm_connector_test.c
+++ b/drivers/gpu/drm/tests/drm_connector_test.c
@@ -187,6 +187,7 @@ static void drm_test_connector_hdmi_init_valid(struct kunit 
*test)
                                       &dummy_funcs,
                                       DRM_MODE_CONNECTOR_HDMIA,
                                       &priv->ddc,
+                                      BIT(HDMI_COLORSPACE_RGB),
                                       8);
        KUNIT_EXPECT_EQ(test, ret, 0);
 }
@@ -204,6 +205,7 @@ static void drm_test_connector_hdmi_init_null_ddc(struct 
kunit *test)
                                       &dummy_funcs,
                                       DRM_MODE_CONNECTOR_HDMIA,
                                       NULL,
+                                      BIT(HDMI_COLORSPACE_RGB),
                                       8);
        KUNIT_EXPECT_EQ(test, ret, 0);
 }
@@ -221,6 +223,7 @@ static void drm_test_connector_hdmi_init_bpc_invalid(struct 
kunit *test)
                                       &dummy_funcs,
                                       DRM_MODE_CONNECTOR_HDMIA,
                                       &priv->ddc,
+                                      BIT(HDMI_COLORSPACE_RGB),
                                       9);
        KUNIT_EXPECT_LT(test, ret, 0);
 }
@@ -238,6 +241,7 @@ static void drm_test_connector_hdmi_init_bpc_null(struct 
kunit *test)
                                       &dummy_funcs,
                                       DRM_MODE_CONNECTOR_HDMIA,
                                       &priv->ddc,
+                                      BIT(HDMI_COLORSPACE_RGB),
                                       0);
        KUNIT_EXPECT_LT(test, ret, 0);
 }
@@ -259,6 +263,7 @@ static void drm_test_connector_hdmi_init_bpc_8(struct kunit 
*test)
                                       &dummy_funcs,
                                       DRM_MODE_CONNECTOR_HDMIA,
                                       &priv->ddc,
+                                      BIT(HDMI_COLORSPACE_RGB),
                                       8);
        KUNIT_EXPECT_EQ(test, ret, 0);
 
@@ -292,6 +297,7 @@ static void drm_test_connector_hdmi_init_bpc_10(struct 
kunit *test)
                                       &dummy_funcs,
                                       DRM_MODE_CONNECTOR_HDMIA,
                                       &priv->ddc,
+                                      BIT(HDMI_COLORSPACE_RGB),
                                       10);
        KUNIT_EXPECT_EQ(test, ret, 0);
 
@@ -325,6 +331,7 @@ static void drm_test_connector_hdmi_init_bpc_12(struct 
kunit *test)
                                       &dummy_funcs,
                                       DRM_MODE_CONNECTOR_HDMIA,
                                       &priv->ddc,
+                                      BIT(HDMI_COLORSPACE_RGB),
                                       12);
        KUNIT_EXPECT_EQ(test, ret, 0);
 
@@ -341,6 +348,42 @@ static void drm_test_connector_hdmi_init_bpc_12(struct 
kunit *test)
        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 no supported
+ * format fails.
+ */
+static void drm_test_connector_hdmi_init_formats_empty(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,
+                                      8);
+       KUNIT_EXPECT_LT(test, ret, 0);
+}
+
+/*
+ * Test that the registration of an HDMI connector not listing RGB as a
+ * supported format fails.
+ */
+static void drm_test_connector_hdmi_init_formats_no_rgb(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,
+                                      BIT(HDMI_COLORSPACE_YUV422),
+                                      8);
+       KUNIT_EXPECT_LT(test, ret, 0);
+}
+
 /*
  * Test that the registration of an HDMI connector with an HDMI
  * connector type succeeds.
@@ -355,6 +398,7 @@ static void drm_test_connector_hdmi_init_type_valid(struct 
kunit *test)
                                       &dummy_funcs,
                                       connector_type,
                                       &priv->ddc,
+                                      BIT(HDMI_COLORSPACE_RGB),
                                       8);
        KUNIT_EXPECT_EQ(test, ret, 0);
 }
@@ -387,6 +431,7 @@ static void 
drm_test_connector_hdmi_init_type_invalid(struct kunit *test)
                                       &dummy_funcs,
                                       connector_type,
                                       &priv->ddc,
+                                      BIT(HDMI_COLORSPACE_RGB),
                                       8);
        KUNIT_EXPECT_LT(test, ret, 0);
 }
@@ -424,6 +469,8 @@ static struct kunit_case drmm_connector_hdmi_init_tests[] = 
{
        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_formats_empty),
+       KUNIT_CASE(drm_test_connector_hdmi_init_formats_no_rgb),
        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),
@@ -558,6 +605,64 @@ static struct kunit_suite 
drm_hdmi_connector_get_broadcast_rgb_name_test_suite =
        .test_cases = drm_hdmi_connector_get_broadcast_rgb_name_tests,
 };
 
+struct drm_hdmi_connector_get_output_format_name_test {
+       unsigned int kind;
+       const char *expected_name;
+};
+
+#define OUTPUT_FORMAT_TEST(_kind, _name)       \
+       {                                       \
+               .kind = _kind,                  \
+               .expected_name = _name,         \
+       }
+
+static void drm_test_drm_hdmi_connector_get_output_format_name(struct kunit 
*test)
+{
+       const struct drm_hdmi_connector_get_output_format_name_test *params =
+               test->param_value;
+
+       KUNIT_EXPECT_STREQ(test,
+                          
drm_hdmi_connector_get_output_format_name(params->kind),
+                          params->expected_name);
+}
+
+static const
+struct drm_hdmi_connector_get_output_format_name_test
+drm_hdmi_connector_get_output_format_name_valid_tests[] = {
+       OUTPUT_FORMAT_TEST(HDMI_COLORSPACE_RGB, "RGB"),
+       OUTPUT_FORMAT_TEST(HDMI_COLORSPACE_YUV420, "YUV 4:2:0"),
+       OUTPUT_FORMAT_TEST(HDMI_COLORSPACE_YUV422, "YUV 4:2:2"),
+       OUTPUT_FORMAT_TEST(HDMI_COLORSPACE_YUV444, "YUV 4:4:4"),
+};
+
+static void
+drm_hdmi_connector_get_output_format_name_valid_desc(const struct 
drm_hdmi_connector_get_output_format_name_test *t,
+                                                    char *desc)
+{
+       sprintf(desc, "%s", t->expected_name);
+}
+
+KUNIT_ARRAY_PARAM(drm_hdmi_connector_get_output_format_name_valid,
+                 drm_hdmi_connector_get_output_format_name_valid_tests,
+                 drm_hdmi_connector_get_output_format_name_valid_desc);
+
+static void drm_test_drm_hdmi_connector_get_output_format_name_invalid(struct 
kunit *test)
+{
+       KUNIT_EXPECT_NULL(test, drm_hdmi_connector_get_output_format_name(4));
+};
+
+static struct kunit_case drm_hdmi_connector_get_output_format_name_tests[] = {
+       KUNIT_CASE_PARAM(drm_test_drm_hdmi_connector_get_output_format_name,
+                        
drm_hdmi_connector_get_output_format_name_valid_gen_params),
+       KUNIT_CASE(drm_test_drm_hdmi_connector_get_output_format_name_invalid),
+       { }
+};
+
+static struct kunit_suite drm_hdmi_connector_get_output_format_name_test_suite 
= {
+       .name = "drm_hdmi_connector_get_output_format_name",
+       .test_cases = drm_hdmi_connector_get_output_format_name_tests,
+};
+
 static void drm_test_drm_connector_attach_broadcast_rgb_property(struct kunit 
*test)
 {
        struct drm_connector_init_priv *priv = test->priv;
@@ -590,6 +695,7 @@ static void 
drm_test_drm_connector_attach_broadcast_rgb_property_hdmi_connector(
                                       &dummy_funcs,
                                       DRM_MODE_CONNECTOR_HDMIA,
                                       &priv->ddc,
+                                      BIT(HDMI_COLORSPACE_RGB),
                                       8);
        KUNIT_EXPECT_EQ(test, ret, 0);
 
@@ -618,7 +724,8 @@ kunit_test_suites(
        &drmm_connector_init_test_suite,
        &drm_connector_attach_broadcast_rgb_property_test_suite,
        &drm_get_tv_mode_from_name_test_suite,
-       &drm_hdmi_connector_get_broadcast_rgb_name_test_suite
+       &drm_hdmi_connector_get_broadcast_rgb_name_test_suite,
+       &drm_hdmi_connector_get_output_format_name_test_suite
 );
 
 MODULE_AUTHOR("Maxime Ripard <max...@cerno.tech>");
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index 1b1b6aed04ee..74db5ce47e01 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -391,6 +391,8 @@ enum drm_hdmi_broadcast_rgb {
 
 const char *
 drm_hdmi_connector_get_broadcast_rgb_name(enum drm_hdmi_broadcast_rgb 
broadcast_rgb);
+const char *
+drm_hdmi_connector_get_output_format_name(enum hdmi_colorspace fmt);
 
 /**
  * struct drm_monitor_range_info - Panel's Monitor range in EDID for
@@ -1077,6 +1079,11 @@ struct drm_connector_state {
                 * @output_bpc: Bits per color channel to output.
                 */
                unsigned int output_bpc;
+
+               /**
+                * @output_format: Pixel format to output in.
+                */
+               enum hdmi_colorspace output_format;
        } hdmi;
 };
 
@@ -1944,6 +1951,17 @@ struct drm_connector {
 
        /** @hdr_sink_metadata: HDR Metadata Information read from sink */
        struct hdr_sink_metadata hdr_sink_metadata;
+
+       /**
+        * @hdmi: HDMI-related variable and properties.
+        */
+       struct {
+               /**
+                * @supported_formats: Bitmask of @hdmi_colorspace
+                * supported by the controller.
+                */
+               unsigned long supported_formats;
+       } hdmi;
 };
 
 #define obj_to_connector(x) container_of(x, struct drm_connector, base)
@@ -1967,6 +1985,7 @@ int drmm_connector_hdmi_init(struct drm_device *dev,
                             const struct drm_connector_funcs *funcs,
                             int connector_type,
                             struct i2c_adapter *ddc,
+                            unsigned long supported_formats,
                             unsigned int max_bpc);
 void drm_connector_attach_edid_property(struct drm_connector *connector);
 int drm_connector_register(struct drm_connector *connector);

-- 
2.43.0

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