[PATCH 42/50] drm/amd/display: Check stream pointer is initialized before accessing

[Fangzhi Zuo]

From: Sung Joon Kim <sungjoon.kim at amd.com>

[why & how]
We calculate static screen wait frames based
on the current timing info in the active stream.
If stream is not initialized, then we should skip
the calculation and go with the default values.

Reviewed-by: Gabe Teeger <gabe.teeger at amd.com>
Signed-off-by: Jerry Zuo <jerry.zuo at amd.com>
Signed-off-by: Sung Joon Kim <sungjoon.kim at amd.com>
---
 drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c
index ddf0807db627..ac1e3331a77c 100644
--- a/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c
@@ -1461,10 +1461,9 @@ void dcn35_set_drr(struct pipe_ctx **pipe_ctx,
 
 	for (i = 0; i < num_pipes; i++) {
 		if ((pipe_ctx[i]->stream_res.tg != NULL) && pipe_ctx[i]->stream_res.tg->funcs) {
-			struct dc_crtc_timing *timing = &pipe_ctx[i]->stream->timing;
-			struct dc *dc = pipe_ctx[i]->stream->ctx->dc;
-
-			if (dc->debug.static_screen_wait_frames) {
+			if (pipe_ctx[i]->stream && pipe_ctx[i]->stream->ctx->dc->debug.static_screen_wait_frames) {
+				struct dc_crtc_timing *timing = &pipe_ctx[i]->stream->timing;
+				struct dc *dc = pipe_ctx[i]->stream->ctx->dc;
 				unsigned int frame_rate = timing->pix_clk_100hz / (timing->h_total * timing->v_total);
 
 				if (frame_rate >= 120 && dc->caps.ips_support &&
-- 
2.34.1