drm/amd/display: move watermarks table to pp_smu

[WHAT]
amdgpu_dm_smu_write_watermarks_table() pushes fixed dcn watermark
clock settings to the SMU on Navi1x. It belongs with the other
dc-pplib bridge code, so move it out of amdgpu_dm.c into
amdgpu_dm_pp_smu.c.

It is called from dm_resume(), so it becomes a plain exported function
declared in amdgpu_dm_pp_smu.h (now included by amdgpu_dm.c) instead of
STATIC_IFN_KUNIT in amdgpu_dm.h. Relocate its KUnit test from the
amdgpu_dm suite to the amdgpu_dm_pp_smu suite. No functional change.

Reviewed-by: Bhawanpreet Lakha <bhawanpreet.lakha@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Fangzhi Zuo <jerry.zuo@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -70,6 +70,7 @@
 #include "amdgpu_dm_audio.h"
 #include "amdgpu_dm_dmub.h"
 #include "amdgpu_dm_connector.h"
+#include "amdgpu_dm_pp_smu.h"
 
 #include "ivsrcid/ivsrcid_vislands30.h"
 
@@ -1372,58 +1373,6 @@ static void s3_handle_mst(struct drm_device *dev, bool suspend)
 	drm_connector_list_iter_end(&iter);
 }
 
-STATIC_IFN_KUNIT int amdgpu_dm_smu_write_watermarks_table(struct amdgpu_device *adev)
-{
-	int ret = 0;
-
-	/* This interface is for dGPU Navi1x.Linux dc-pplib interface depends
-	 * on window driver dc implementation.
-	 * For Navi1x, clock settings of dcn watermarks are fixed. the settings
-	 * should be passed to smu during boot up and resume from s3.
-	 * boot up: dc calculate dcn watermark clock settings within dc_create,
-	 * dcn20_resource_construct
-	 * then call pplib functions below to pass the settings to smu:
-	 * smu_set_watermarks_for_clock_ranges
-	 * smu_set_watermarks_table
-	 * navi10_set_watermarks_table
-	 * smu_write_watermarks_table
-	 *
-	 * For Renoir, clock settings of dcn watermark are also fixed values.
-	 * dc has implemented different flow for window driver:
-	 * dc_hardware_init / dc_set_power_state
-	 * dcn10_init_hw
-	 * notify_wm_ranges
-	 * set_wm_ranges
-	 * -- Linux
-	 * smu_set_watermarks_for_clock_ranges
-	 * renoir_set_watermarks_table
-	 * smu_write_watermarks_table
-	 *
-	 * For Linux,
-	 * dc_hardware_init -> amdgpu_dm_init
-	 * dc_set_power_state --> dm_resume
-	 *
-	 * therefore, this function apply to navi10/12/14 but not Renoir
-	 * *
-	 */
-	switch (amdgpu_ip_version(adev, DCE_HWIP, 0)) {
-	case IP_VERSION(2, 0, 2):
-	case IP_VERSION(2, 0, 0):
-		break;
-	default:
-		return 0;
-	}
-
-	ret = amdgpu_dpm_write_watermarks_table(adev);
-	if (ret) {
-		drm_err(adev_to_drm(adev), "Failed to update WMTABLE!\n");
-		return ret;
-	}
-
-	return 0;
-}
-EXPORT_IF_KUNIT(amdgpu_dm_smu_write_watermarks_table);
-
 static int dm_oem_i2c_hw_init(struct amdgpu_device *adev)
 {
 	struct amdgpu_display_manager *dm = &adev->dm;

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h

@@ -1157,7 +1157,6 @@ int dm_crtc_get_scanoutpos(struct amdgpu_device *adev, int crtc,
 struct dm_atomic_state *dm_atomic_get_new_state(struct drm_atomic_commit *state);
 void dm_atomic_destroy_state(struct drm_private_obj *obj,
 			     struct drm_private_state *state);
-int amdgpu_dm_smu_write_watermarks_table(struct amdgpu_device *adev);
 bool dm_should_update_native_cursor(struct drm_atomic_commit *state,
 				    struct drm_crtc *old_plane_crtc,
 				    struct drm_crtc *new_plane_crtc,

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c

@@ -792,3 +792,55 @@ void dm_pp_get_funcs(
 	}
 }
 EXPORT_IF_KUNIT(dm_pp_get_funcs);
+
+int amdgpu_dm_smu_write_watermarks_table(struct amdgpu_device *adev)
+{
+	int ret = 0;
+
+	/* This interface is for dGPU Navi1x.Linux dc-pplib interface depends
+	 * on window driver dc implementation.
+	 * For Navi1x, clock settings of dcn watermarks are fixed. the settings
+	 * should be passed to smu during boot up and resume from s3.
+	 * boot up: dc calculate dcn watermark clock settings within dc_create,
+	 * dcn20_resource_construct
+	 * then call pplib functions below to pass the settings to smu:
+	 * smu_set_watermarks_for_clock_ranges
+	 * smu_set_watermarks_table
+	 * navi10_set_watermarks_table
+	 * smu_write_watermarks_table
+	 *
+	 * For Renoir, clock settings of dcn watermark are also fixed values.
+	 * dc has implemented different flow for window driver:
+	 * dc_hardware_init / dc_set_power_state
+	 * dcn10_init_hw
+	 * notify_wm_ranges
+	 * set_wm_ranges
+	 * -- Linux
+	 * smu_set_watermarks_for_clock_ranges
+	 * renoir_set_watermarks_table
+	 * smu_write_watermarks_table
+	 *
+	 * For Linux,
+	 * dc_hardware_init -> amdgpu_dm_init
+	 * dc_set_power_state --> dm_resume
+	 *
+	 * therefore, this function apply to navi10/12/14 but not Renoir
+	 * *
+	 */
+	switch (amdgpu_ip_version(adev, DCE_HWIP, 0)) {
+	case IP_VERSION(2, 0, 2):
+	case IP_VERSION(2, 0, 0):
+		break;
+	default:
+		return 0;
+	}
+
+	ret = amdgpu_dpm_write_watermarks_table(adev);
+	if (ret) {
+		drm_err(adev_to_drm(adev), "Failed to update WMTABLE!\n");
+		return ret;
+	}
+
+	return 0;
+}
+EXPORT_IF_KUNIT(amdgpu_dm_smu_write_watermarks_table);

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.h

@@ -11,6 +11,9 @@
 struct amd_pp_display_configuration;
 struct pp_smu_wm_range_sets;
 struct dm_pp_wm_sets_with_clock_ranges_soc15;
+struct amdgpu_device;
+
+int amdgpu_dm_smu_write_watermarks_table(struct amdgpu_device *adev);
 
 #if IS_ENABLED(CONFIG_DRM_AMD_DC_KUNIT_TEST)
 void build_pm_display_cfg(struct amd_pp_display_configuration *pm_display_cfg,

drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_pp_smu_test.c

@@ -16,6 +16,7 @@
 #include "amdgpu_mode.h"
 #include "amdgpu_dm.h"
 #include "amdgpu_dm_pp_smu.h"
+#include "amdgpu_dm_kunit_test_helpers.h"
 
 /* ---- Stub DPM layer ---- */
 
@@ -2321,6 +2322,23 @@ static void dm_test_nv_get_uclk_dpm_states_fail(struct kunit *test)
 			(int)PP_SMU_RESULT_FAIL);
 }
 
+/* Tests for amdgpu_dm_smu_write_watermarks_table() */
+
+/**
+ * dm_test_smu_write_watermarks_table_default - Test watermarks table skips non-Navi1x IP versions
+ * @test: The KUnit test context
+ */
+static void dm_test_smu_write_watermarks_table_default(struct kunit *test)
+{
+	struct amdgpu_device *adev = dm_kunit_alloc_adev(test);
+
+	/*
+	 * A zeroed adev reports DCE IP version 0, which is not one of the
+	 * Navi1x versions handled by the switch, so the function returns early.
+	 */
+	KUNIT_EXPECT_EQ(test, amdgpu_dm_smu_write_watermarks_table(adev), 0);
+}
+
 static struct kunit_case dm_pp_smu_test_cases[] = {
 	/* get_default_clock_levels */
 	KUNIT_CASE(dm_test_default_clock_levels_display),
@@ -2440,6 +2458,8 @@ static struct kunit_case dm_pp_smu_test_cases[] = {
 	KUNIT_CASE(dm_test_nv_get_uclk_dpm_states_ok),
 	KUNIT_CASE(dm_test_nv_get_uclk_dpm_states_unsupported),
 	KUNIT_CASE(dm_test_nv_get_uclk_dpm_states_fail),
+	/* amdgpu_dm_smu_write_watermarks_table */
+	KUNIT_CASE(dm_test_smu_write_watermarks_table_default),
 	{}
 };
 

drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_test.c

@@ -316,21 +316,6 @@ static void dm_test_atomic_destroy_state_no_context(struct kunit *test)
 	dm_atomic_destroy_state(NULL, &dm_state->base);
 }
 
-/**
- * dm_test_smu_write_watermarks_table_default - Test watermarks table skips non-Navi1x IP versions
- * @test: The KUnit test context
- */
-static void dm_test_smu_write_watermarks_table_default(struct kunit *test)
-{
-	struct amdgpu_device *adev = dm_kunit_alloc_adev(test);
-
-	/*
-	 * A zeroed adev reports DCE IP version 0, which is not one of the
-	 * Navi1x versions handled by the switch, so the function returns early.
-	 */
-	KUNIT_EXPECT_EQ(test, amdgpu_dm_smu_write_watermarks_table(adev), 0);
-}
-
 /* Tests for dm_plane_layer_index_cmp() */
 
 /**
@@ -1801,7 +1786,6 @@ static struct kunit_case amdgpu_dm_tests[] = {
 	KUNIT_CASE(dm_test_should_update_native_cursor_disable_native),
 	KUNIT_CASE(dm_test_should_update_native_cursor_enable_overlay),
 	KUNIT_CASE(dm_test_atomic_destroy_state_no_context),
-	KUNIT_CASE(dm_test_smu_write_watermarks_table_default),
 	/* dm_plane_layer_index_cmp */
 	KUNIT_CASE(dm_test_plane_layer_index_cmp_equal),
 	KUNIT_CASE(dm_test_plane_layer_index_cmp_descending),