From: Charlene Liu <Charlene.Liu@amd.com>
Date: Wed, 11 Feb 2026 21:53:44 +0000 (-0500)
Subject: drm/amd/display: Fix dcn401_optimize_bandwidth
X-Git-Tag: v7.1-rc1~167^2~31^2~95
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=002f32db0d4292f117994c330928d2374887b28e;p=thirdparty%2Fkernel%2Flinux.git

drm/amd/display: Fix dcn401_optimize_bandwidth

[Why&How]
We should check for != zstate disallow and programming extend blank from a
different struct.

Reviewed-by: Leo Chen <leo.chen@amd.com>
Reviewed-by: Dmytro Laktyushkin <dmytro.laktyushkin@amd.com>
Signed-off-by: Charlene Liu <Charlene.Liu@amd.com>
Signed-off-by: Ivan Lipski <ivan.lipski@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c
index f604c30e8493f..95d9e17a269b3 100644
--- a/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c
@@ -1483,7 +1483,7 @@ void dcn401_optimize_bandwidth(
 			dc->clk_mgr,
 			context,
 			true);
-	if (context->bw_ctx.bw.dcn.clk.zstate_support == DCN_ZSTATE_SUPPORT_ALLOW) {
+	if (context->bw_ctx.bw.dcn.clk.zstate_support != DCN_ZSTATE_SUPPORT_DISALLOW) {
 		for (i = 0; i < dc->res_pool->pipe_count; ++i) {
 			struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[i];
 
@@ -1491,7 +1491,7 @@ void dcn401_optimize_bandwidth(
 				&& pipe_ctx->stream->adjust.v_total_min == pipe_ctx->stream->adjust.v_total_max
 				&& pipe_ctx->stream->adjust.v_total_max > pipe_ctx->stream->timing.v_total)
 					pipe_ctx->plane_res.hubp->funcs->program_extended_blank(pipe_ctx->plane_res.hubp,
-						pipe_ctx->dlg_regs.min_dst_y_next_start);
+						pipe_ctx->hubp_regs.dlg_regs.min_dst_y_next_start);
 		}
 	}
 }