Commit b94e1647 authored by Matthias Blankertz's avatar Matthias Blankertz Committed by Mark Brown

ASoC: rsnd: Fix HDMI channel mapping for multi-SSI mode

The HDMI?_SEL register maps up to four stereo SSI data lanes onto the
sdata[0..3] inputs of the HDMI output block. The upper half of the
register contains four blocks of 4 bits, with the most significant
controlling the sdata3 line and the least significant the sdata0 line.

The shift calculation has an off-by-one error, causing the parent SSI to
be mapped to sdata3, the first multi-SSI child to sdata0 and so forth.
As the parent SSI transmits the stereo L/R channels, and the HDMI core
expects it on the sdata0 line, this causes no audio to be output when
playing stereo audio on a multichannel capable HDMI out, and
multichannel audio has permutated channels.

Fix the shift calculation to map the parent SSI to sdata0, the first
child to sdata1 etc.
Signed-off-by: default avatarMatthias Blankertz <matthias.blankertz@cetitec.com>
Acked-by: default avatarKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/20200415141017.384017-3-matthias.blankertz@cetitec.comSigned-off-by: default avatarMark Brown <broonie@kernel.org>
parent a09fb3f2
......@@ -221,7 +221,7 @@ static int rsnd_ssiu_init_gen2(struct rsnd_mod *mod,
i;
for_each_rsnd_mod_array(i, pos, io, rsnd_ssi_array) {
shift = (i * 4) + 16;
shift = (i * 4) + 20;
val = (val & ~(0xF << shift)) |
rsnd_mod_id(pos) << shift;
}
......
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