drm/amd/display: run subvp validation with supported vlevel

[WHY]
Subvp portion validation currently assumes that if vlevel provided does not
support pstate, then none will, and so subvp is not used.

[HOW]
After get vlevel, use lowest vlevel that supports pstate if it
exists, and use that for subvp validation.

Reviewed-by: Alvin Lee <[e-mail]>
Reviewed-by: Jun Lei <[e-mail]>
Acked-by: Jasdeep Dhillon <[e-mail]>
Signed-off-by: Dillon Varone <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c

···
 			pipes[0].clks_cfg.dppclk_mhz = get_dppclk_calculated(&context->bw_ctx.dml, pipes, *pipe_cnt, 0);
 			*vlevel = dml_get_voltage_level(&context->bw_ctx.dml, pipes, *pipe_cnt);
 
+			/* Check that vlevel requested supports pstate or not
+			 * if not, select the lowest vlevel that supports it
+			 */
+			for (i = *vlevel; i < context->bw_ctx.dml.soc.num_states; i++) {
+				if (vba->DRAMClockChangeSupport[i][vba->maxMpcComb] != dm_dram_clock_change_unsupported) {
+					*vlevel = i;
+					break;
+				}
+			}
+
 			if (*vlevel < context->bw_ctx.dml.soc.num_states &&
 			    vba->DRAMClockChangeSupport[*vlevel][vba->maxMpcComb] != dm_dram_clock_change_unsupported
 			    && subvp_validate_static_schedulability(dc, context, *vlevel)) {