Patch "drm/amd/display: fix disable otg wa logic in DCN316" has been added to the 6.6-stable tree

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This is a note to let you know that I've just added the patch titled

    drm/amd/display: fix disable otg wa logic in DCN316

to the 6.6-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-amd-display-fix-disable-otg-wa-logic-in-dcn316.patch
and it can be found in the queue-6.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From cf79814cb0bf5749b9f0db53ca231aa540c02768 Mon Sep 17 00:00:00 2001
From: Fudongwang <fudong.wang@xxxxxxx>
Date: Tue, 26 Mar 2024 16:03:16 +0800
Subject: drm/amd/display: fix disable otg wa logic in DCN316

From: Fudongwang <fudong.wang@xxxxxxx>

commit cf79814cb0bf5749b9f0db53ca231aa540c02768 upstream.

[Why]
Wrong logic cause screen corruption.

[How]
Port logic from DCN35/314.

Cc: stable@xxxxxxxxxxxxxxx
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@xxxxxxx>
Acked-by: Hamza Mahfooz <hamza.mahfooz@xxxxxxx>
Signed-off-by: Fudongwang <fudong.wang@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/amd/display/dc/clk_mgr/dcn316/dcn316_clk_mgr.c |   19 ++++++----
 1 file changed, 12 insertions(+), 7 deletions(-)

--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn316/dcn316_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn316/dcn316_clk_mgr.c
@@ -99,20 +99,25 @@ static int dcn316_get_active_display_cnt
 	return display_count;
 }
 
-static void dcn316_disable_otg_wa(struct clk_mgr *clk_mgr_base, struct dc_state *context, bool disable)
+static void dcn316_disable_otg_wa(struct clk_mgr *clk_mgr_base, struct dc_state *context,
+		bool safe_to_lower, bool disable)
 {
 	struct dc *dc = clk_mgr_base->ctx->dc;
 	int i;
 
 	for (i = 0; i < dc->res_pool->pipe_count; ++i) {
-		struct pipe_ctx *pipe = &dc->current_state->res_ctx.pipe_ctx[i];
+		struct pipe_ctx *pipe = safe_to_lower
+			? &context->res_ctx.pipe_ctx[i]
+			: &dc->current_state->res_ctx.pipe_ctx[i];
 
 		if (pipe->top_pipe || pipe->prev_odm_pipe)
 			continue;
-		if (pipe->stream && (pipe->stream->dpms_off || pipe->plane_state == NULL ||
-				     dc_is_virtual_signal(pipe->stream->signal))) {
+		if (pipe->stream && (pipe->stream->dpms_off || dc_is_virtual_signal(pipe->stream->signal) ||
+				     !pipe->stream->link_enc)) {
 			if (disable) {
-				pipe->stream_res.tg->funcs->immediate_disable_crtc(pipe->stream_res.tg);
+				if (pipe->stream_res.tg && pipe->stream_res.tg->funcs->immediate_disable_crtc)
+					pipe->stream_res.tg->funcs->immediate_disable_crtc(pipe->stream_res.tg);
+
 				reset_sync_context_for_pipe(dc, context, i);
 			} else
 				pipe->stream_res.tg->funcs->enable_crtc(pipe->stream_res.tg);
@@ -207,11 +212,11 @@ static void dcn316_update_clocks(struct
 	}
 
 	if (should_set_clock(safe_to_lower, new_clocks->dispclk_khz, clk_mgr_base->clks.dispclk_khz)) {
-		dcn316_disable_otg_wa(clk_mgr_base, context, true);
+		dcn316_disable_otg_wa(clk_mgr_base, context, safe_to_lower, true);
 
 		clk_mgr_base->clks.dispclk_khz = new_clocks->dispclk_khz;
 		dcn316_smu_set_dispclk(clk_mgr, clk_mgr_base->clks.dispclk_khz);
-		dcn316_disable_otg_wa(clk_mgr_base, context, false);
+		dcn316_disable_otg_wa(clk_mgr_base, context, safe_to_lower, false);
 
 		update_dispclk = true;
 	}


Patches currently in stable-queue which might be from fudong.wang@xxxxxxx are

queue-6.6/drm-amd-display-fix-disable-otg-wa-logic-in-dcn316.patch




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