From: Greg Kroah-Hartman Date: Tue, 7 Jul 2020 12:42:38 +0000 (+0200) Subject: Revert "ALSA: usb-audio: Improve frames size computation" X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ab0b5e92fc36ee82c1bd01fe896d0f775ed5de41;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git Revert "ALSA: usb-audio: Improve frames size computation" This reverts commit 5ef30e443e6d3654cccecec99cf481a69a0a6d3b which is commit f0bd62b64016508938df9babe47f65c2c727d25c upstream. It causes a number of reported issues and a fix for it has not hit Linus's tree yet. Revert this to resolve those problems. Cc: Alexander Tsoy Cc: Takashi Iwai Cc: Sasha Levin Cc: Hans de Goede Signed-off-by: Greg Kroah-Hartman --- diff --git a/sound/usb/card.h b/sound/usb/card.h index c4599cf0ddc9..111b0f009afa 100644 --- a/sound/usb/card.h +++ b/sound/usb/card.h @@ -80,10 +80,6 @@ struct snd_usb_endpoint { dma_addr_t sync_dma; /* DMA address of syncbuf */ unsigned int pipe; /* the data i/o pipe */ - unsigned int framesize[2]; /* small/large frame sizes in samples */ - unsigned int sample_rem; /* remainder from division fs/fps */ - unsigned int sample_accum; /* sample accumulator */ - unsigned int fps; /* frames per second */ unsigned int freqn; /* nominal sampling rate in fs/fps in Q16.16 format */ unsigned int freqm; /* momentary sampling rate in fs/fps in Q16.16 format */ int freqshift; /* how much to shift the feedback value to get Q16.16 */ diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c index b5207e71ed72..30aa5f2df6da 100644 --- a/sound/usb/endpoint.c +++ b/sound/usb/endpoint.c @@ -137,12 +137,12 @@ int snd_usb_endpoint_implicit_feedback_sink(struct snd_usb_endpoint *ep) /* * For streaming based on information derived from sync endpoints, - * prepare_outbound_urb_sizes() will call slave_next_packet_size() to + * prepare_outbound_urb_sizes() will call next_packet_size() to * determine the number of samples to be sent in the next packet. * - * For implicit feedback, slave_next_packet_size() is unused. + * For implicit feedback, next_packet_size() is unused. */ -int snd_usb_endpoint_slave_next_packet_size(struct snd_usb_endpoint *ep) +int snd_usb_endpoint_next_packet_size(struct snd_usb_endpoint *ep) { unsigned long flags; int ret; @@ -159,29 +159,6 @@ int snd_usb_endpoint_slave_next_packet_size(struct snd_usb_endpoint *ep) return ret; } -/* - * For adaptive and synchronous endpoints, prepare_outbound_urb_sizes() - * will call next_packet_size() to determine the number of samples to be - * sent in the next packet. - */ -int snd_usb_endpoint_next_packet_size(struct snd_usb_endpoint *ep) -{ - int ret; - - if (ep->fill_max) - return ep->maxframesize; - - ep->sample_accum += ep->sample_rem; - if (ep->sample_accum >= ep->fps) { - ep->sample_accum -= ep->fps; - ret = ep->framesize[1]; - } else { - ret = ep->framesize[0]; - } - - return ret; -} - static void retire_outbound_urb(struct snd_usb_endpoint *ep, struct snd_urb_ctx *urb_ctx) { @@ -226,8 +203,6 @@ static void prepare_silent_urb(struct snd_usb_endpoint *ep, if (ctx->packet_size[i]) counts = ctx->packet_size[i]; - else if (ep->sync_master) - counts = snd_usb_endpoint_slave_next_packet_size(ep); else counts = snd_usb_endpoint_next_packet_size(ep); @@ -900,17 +875,10 @@ int snd_usb_endpoint_set_params(struct snd_usb_endpoint *ep, ep->maxpacksize = fmt->maxpacksize; ep->fill_max = !!(fmt->attributes & UAC_EP_CS_ATTR_FILL_MAX); - if (snd_usb_get_speed(ep->chip->dev) == USB_SPEED_FULL) { + if (snd_usb_get_speed(ep->chip->dev) == USB_SPEED_FULL) ep->freqn = get_usb_full_speed_rate(rate); - ep->fps = 1000; - } else { + else ep->freqn = get_usb_high_speed_rate(rate); - ep->fps = 8000; - } - - ep->sample_rem = rate % ep->fps; - ep->framesize[0] = rate / ep->fps; - ep->framesize[1] = (rate + (ep->fps - 1)) / ep->fps; /* calculate the frequency in 16.16 format */ ep->freqm = ep->freqn; @@ -969,7 +937,6 @@ int snd_usb_endpoint_start(struct snd_usb_endpoint *ep) ep->active_mask = 0; ep->unlink_mask = 0; ep->phase = 0; - ep->sample_accum = 0; snd_usb_endpoint_start_quirk(ep); diff --git a/sound/usb/endpoint.h b/sound/usb/endpoint.h index 4aad49cbeb5f..584f295d7c77 100644 --- a/sound/usb/endpoint.h +++ b/sound/usb/endpoint.h @@ -27,7 +27,6 @@ void snd_usb_endpoint_release(struct snd_usb_endpoint *ep); void snd_usb_endpoint_free(struct snd_usb_endpoint *ep); int snd_usb_endpoint_implicit_feedback_sink(struct snd_usb_endpoint *ep); -int snd_usb_endpoint_slave_next_packet_size(struct snd_usb_endpoint *ep); int snd_usb_endpoint_next_packet_size(struct snd_usb_endpoint *ep); void snd_usb_handle_sync_urb(struct snd_usb_endpoint *ep, diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c index 615213aeda33..9bc995f9b4e1 100644 --- a/sound/usb/pcm.c +++ b/sound/usb/pcm.c @@ -1483,8 +1483,6 @@ static void prepare_playback_urb(struct snd_usb_substream *subs, for (i = 0; i < ctx->packets; i++) { if (ctx->packet_size[i]) counts = ctx->packet_size[i]; - else if (ep->sync_master) - counts = snd_usb_endpoint_slave_next_packet_size(ep); else counts = snd_usb_endpoint_next_packet_size(ep);