This is a note to let you know that I've just added the patch titled drm/amd/display: fix k1 k2 divider programming for phantom streams to the 6.1-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-k1-k2-divider-programming-for-ph.patch and it can be found in the queue-6.1 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 4f0025f198e8e65b4bdacd66e054d06ff6544441 Author: Aurabindo Pillai <aurabindo.pillai@xxxxxxx> Date: Mon Jan 30 13:07:59 2023 -0500 drm/amd/display: fix k1 k2 divider programming for phantom streams [ Upstream commit 3b214bb7185d8284d7d4c53e15127f69a375abf6 ] [Why & How] When k1 and k2 divider programming logic is executed for a phantom stream, the corresponding master stream should be used for the calculation. Fix the if condition to use the master stream for checking signal type instead of the phantom stream. Reviewed-by: Alvin Lee <Alvin.Lee2@xxxxxxx> Acked-by: Qingqing Zhuo <qingqing.zhuo@xxxxxxx> Signed-off-by: Aurabindo Pillai <aurabindo.pillai@xxxxxxx> Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> Stable-dep-of: 709671ffb15d ("drm/amd/display: Remove OTG DIV register write for Virtual signals.") Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c index f31d8efadeb75..f108e82e70c8b 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c @@ -1174,13 +1174,13 @@ unsigned int dcn32_calculate_dccg_k1_k2_values(struct pipe_ctx *pipe_ctx, unsign if (is_dp_128b_132b_signal(pipe_ctx)) { *k1_div = PIXEL_RATE_DIV_BY_1; *k2_div = PIXEL_RATE_DIV_BY_1; - } else if (dc_is_hdmi_tmds_signal(pipe_ctx->stream->signal) || dc_is_dvi_signal(pipe_ctx->stream->signal)) { + } else if (dc_is_hdmi_tmds_signal(stream->signal) || dc_is_dvi_signal(stream->signal)) { *k1_div = PIXEL_RATE_DIV_BY_1; if (stream->timing.pixel_encoding == PIXEL_ENCODING_YCBCR420) *k2_div = PIXEL_RATE_DIV_BY_2; else *k2_div = PIXEL_RATE_DIV_BY_4; - } else if (dc_is_dp_signal(pipe_ctx->stream->signal) || dc_is_virtual_signal(pipe_ctx->stream->signal)) { + } else if (dc_is_dp_signal(stream->signal) || dc_is_virtual_signal(stream->signal)) { if (two_pix_per_container) { *k1_div = PIXEL_RATE_DIV_BY_1; *k2_div = PIXEL_RATE_DIV_BY_2;