drm/amd/display: Fix Null point error if smu ip was disabled

from AI, SMU Ip is not indispensable to driver and can be
disabled by user via module parameter ip_block_mask.
so the pp_handle may be NULL.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c
index 0fab64a..12001a0 100644 (file)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c
@@ -101,7 +101,7 @@ bool dm_pp_apply_display_requirements(
                        adev->pm.pm_display_cfg.displays[i].controller_id = dc_cfg->pipe_idx + 1;
                }
 
-               if (adev->powerplay.pp_funcs->display_configuration_change)
+               if (adev->powerplay.pp_funcs && adev->powerplay.pp_funcs->display_configuration_change)
                        adev->powerplay.pp_funcs->display_configuration_change(
                                adev->powerplay.pp_handle,
                                &adev->pm.pm_display_cfg);
@@ -304,7 +304,7 @@ bool dm_pp_get_clock_levels_by_type(
        struct amd_pp_simple_clock_info validation_clks = { 0 };
        uint32_t i;
 
-       if (adev->powerplay.pp_funcs->get_clock_by_type) {
+       if (adev->powerplay.pp_funcs && adev->powerplay.pp_funcs->get_clock_by_type) {
                if (adev->powerplay.pp_funcs->get_clock_by_type(pp_handle,
                        dc_to_pp_clock_type(clk_type), &pp_clks)) {
                /* Error in pplib. Provide default values. */
@@ -315,7 +315,7 @@ bool dm_pp_get_clock_levels_by_type(
 
        pp_to_dc_clock_levels(&pp_clks, dc_clks, clk_type);
 
-       if (adev->powerplay.pp_funcs->get_display_mode_validation_clocks) {
+       if (adev->powerplay.pp_funcs && adev->powerplay.pp_funcs->get_display_mode_validation_clocks) {
                if (adev->powerplay.pp_funcs->get_display_mode_validation_clocks(
                                                pp_handle, &validation_clks)) {
                        /* Error in pplib. Provide default values. */
@@ -398,6 +398,9 @@ bool dm_pp_get_clock_levels_by_type_with_voltage(
        struct pp_clock_levels_with_voltage pp_clk_info = {0};
        const struct amd_pm_funcs *pp_funcs = adev->powerplay.pp_funcs;
 
+       if (!pp_funcs || !pp_funcs->get_clock_by_type_with_voltage)
+               return false;
+
        if (pp_funcs->get_clock_by_type_with_voltage(pp_handle,
                                                     dc_to_pp_clock_type(clk_type),
                                                     &pp_clk_info))
@@ -438,7 +441,7 @@ bool dm_pp_apply_clock_for_voltage_request(
        if (!pp_clock_request.clock_type)
                return false;
 
-       if (adev->powerplay.pp_funcs->display_clock_voltage_request)
+       if (adev->powerplay.pp_funcs && adev->powerplay.pp_funcs->display_clock_voltage_request)
                ret = adev->powerplay.pp_funcs->display_clock_voltage_request(
                        adev->powerplay.pp_handle,
                        &pp_clock_request);
@@ -455,7 +458,7 @@ bool dm_pp_get_static_clocks(
        struct amd_pp_clock_info pp_clk_info = {0};
        int ret = 0;
 
-       if (adev->powerplay.pp_funcs->get_current_clocks)
+       if (adev->powerplay.pp_funcs && adev->powerplay.pp_funcs->get_current_clocks)
                ret = adev->powerplay.pp_funcs->get_current_clocks(
                        adev->powerplay.pp_handle,
                        &pp_clk_info);
@@ -505,6 +508,9 @@ void pp_rv_set_wm_ranges(struct pp_smu *pp,
        wm_with_clock_ranges.num_wm_dmif_sets = ranges->num_reader_wm_sets;
        wm_with_clock_ranges.num_wm_mcif_sets = ranges->num_writer_wm_sets;
 
+       if (!pp_funcs || !pp_funcs->set_watermarks_for_clocks_ranges)
+               return;
+
        for (i = 0; i < wm_with_clock_ranges.num_wm_dmif_sets; i++) {
                if (ranges->reader_wm_sets[i].wm_inst > 3)
                        wm_dce_clocks[i].wm_set_id = WM_SET_A;