From 754f9969c323559a12bce1475f3c1e6574129856 Mon Sep 17 00:00:00 2001 From: Andy Walls Date: Sat, 11 Dec 2010 20:38:20 -0300 Subject: [PATCH] [media] cx18: Only allocate a struct cx18_dvb for the DVB TS stream The cx18_stream struct contained a struct cx18_dvb for every stream object, most of which were for analog capture. Now we only allocate the cx18_dvb object for the DTV TS stream. Signed-off-by: Andy Walls Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/cx18/cx18-driver.h | 9 ++--- drivers/media/video/cx18/cx18-dvb.c | 32 +++++++++++------- drivers/media/video/cx18/cx18-mailbox.c | 6 ++-- drivers/media/video/cx18/cx18-streams.c | 45 +++++++++++++++++-------- drivers/media/video/cx18/cx18-streams.h | 3 +- 5 files changed, 60 insertions(+), 35 deletions(-) diff --git a/drivers/media/video/cx18/cx18-driver.h b/drivers/media/video/cx18/cx18-driver.h index cf4f20e9185..f6f3e50d4bd 100644 --- a/drivers/media/video/cx18/cx18-driver.h +++ b/drivers/media/video/cx18/cx18-driver.h @@ -325,7 +325,10 @@ struct cx18_queue { spinlock_t lock; }; +struct cx18_stream; /* forward reference */ + struct cx18_dvb { + struct cx18_stream *stream; struct dmx_frontend hw_frontend; struct dmx_frontend mem_frontend; struct dmxdev dmxdev; @@ -365,9 +368,10 @@ struct cx18_in_work_order { #define CX18_INVALID_TASK_HANDLE 0xffffffff struct cx18_stream { - /* These first four fields are always set, even if the stream + /* These first five fields are always set, even if the stream is not actually created. */ struct video_device *video_dev; /* NULL when stream not created */ + struct cx18_dvb *dvb; /* DVB / Digital Transport */ struct cx18 *cx; /* for ease of use */ const char *name; /* name of the stream */ int type; /* stream type */ @@ -397,9 +401,6 @@ struct cx18_stream { struct cx18_queue q_idle; /* idle - not in rotation */ struct work_struct out_work_order; - - /* DVB / Digital Transport */ - struct cx18_dvb dvb; }; struct cx18_open_id { diff --git a/drivers/media/video/cx18/cx18-dvb.c b/drivers/media/video/cx18/cx18-dvb.c index c7f0bad39ad..f0381d62518 100644 --- a/drivers/media/video/cx18/cx18-dvb.c +++ b/drivers/media/video/cx18/cx18-dvb.c @@ -137,7 +137,7 @@ static int yuan_mpc718_mt352_init(struct dvb_frontend *fe) { struct cx18_dvb *dvb = container_of(fe->dvb, struct cx18_dvb, dvb_adapter); - struct cx18_stream *stream = container_of(dvb, struct cx18_stream, dvb); + struct cx18_stream *stream = dvb->stream; const struct firmware *fw = NULL; int ret; int i; @@ -266,22 +266,22 @@ static int cx18_dvb_start_feed(struct dvb_demux_feed *feed) if (!demux->dmx.frontend) return -EINVAL; - mutex_lock(&stream->dvb.feedlock); - if (stream->dvb.feeding++ == 0) { + mutex_lock(&stream->dvb->feedlock); + if (stream->dvb->feeding++ == 0) { CX18_DEBUG_INFO("Starting Transport DMA\n"); mutex_lock(&cx->serialize_lock); set_bit(CX18_F_S_STREAMING, &stream->s_flags); ret = cx18_start_v4l2_encode_stream(stream); if (ret < 0) { CX18_DEBUG_INFO("Failed to start Transport DMA\n"); - stream->dvb.feeding--; - if (stream->dvb.feeding == 0) + stream->dvb->feeding--; + if (stream->dvb->feeding == 0) clear_bit(CX18_F_S_STREAMING, &stream->s_flags); } mutex_unlock(&cx->serialize_lock); } else ret = 0; - mutex_unlock(&stream->dvb.feedlock); + mutex_unlock(&stream->dvb->feedlock); return ret; } @@ -299,15 +299,15 @@ static int cx18_dvb_stop_feed(struct dvb_demux_feed *feed) CX18_DEBUG_INFO("Stop feed: pid = 0x%x index = %d\n", feed->pid, feed->index); - mutex_lock(&stream->dvb.feedlock); - if (--stream->dvb.feeding == 0) { + mutex_lock(&stream->dvb->feedlock); + if (--stream->dvb->feeding == 0) { CX18_DEBUG_INFO("Stopping Transport DMA\n"); mutex_lock(&cx->serialize_lock); ret = cx18_stop_v4l2_encode_stream(stream, 0); mutex_unlock(&cx->serialize_lock); } else ret = 0; - mutex_unlock(&stream->dvb.feedlock); + mutex_unlock(&stream->dvb->feedlock); } return ret; @@ -316,7 +316,7 @@ static int cx18_dvb_stop_feed(struct dvb_demux_feed *feed) int cx18_dvb_register(struct cx18_stream *stream) { struct cx18 *cx = stream->cx; - struct cx18_dvb *dvb = &stream->dvb; + struct cx18_dvb *dvb = stream->dvb; struct dvb_adapter *dvb_adapter; struct dvb_demux *dvbdemux; struct dmx_demux *dmx; @@ -325,6 +325,9 @@ int cx18_dvb_register(struct cx18_stream *stream) if (!dvb) return -EINVAL; + dvb->enabled = 0; + dvb->stream = stream; + ret = dvb_register_adapter(&dvb->dvb_adapter, CX18_DRIVER_NAME, THIS_MODULE, &cx->pci_dev->dev, adapter_nr); @@ -378,7 +381,7 @@ int cx18_dvb_register(struct cx18_stream *stream) CX18_INFO("DVB Frontend registered\n"); CX18_INFO("Registered DVB adapter%d for %s (%d x %d.%02d kB)\n", - stream->dvb.dvb_adapter.num, stream->name, + stream->dvb->dvb_adapter.num, stream->name, stream->buffers, stream->buf_size/1024, (stream->buf_size * 100 / 1024) % 100); @@ -405,13 +408,16 @@ err_out: void cx18_dvb_unregister(struct cx18_stream *stream) { struct cx18 *cx = stream->cx; - struct cx18_dvb *dvb = &stream->dvb; + struct cx18_dvb *dvb = stream->dvb; struct dvb_adapter *dvb_adapter; struct dvb_demux *dvbdemux; struct dmx_demux *dmx; CX18_INFO("unregister DVB\n"); + if (dvb == NULL || !dvb->enabled) + return; + dvb_adapter = &dvb->dvb_adapter; dvbdemux = &dvb->demux; dmx = &dvbdemux->dmx; @@ -432,7 +438,7 @@ void cx18_dvb_unregister(struct cx18_stream *stream) */ static int dvb_register(struct cx18_stream *stream) { - struct cx18_dvb *dvb = &stream->dvb; + struct cx18_dvb *dvb = stream->dvb; struct cx18 *cx = stream->cx; int ret = 0; diff --git a/drivers/media/video/cx18/cx18-mailbox.c b/drivers/media/video/cx18/cx18-mailbox.c index 956aa190ecc..c545f3beef7 100644 --- a/drivers/media/video/cx18/cx18-mailbox.c +++ b/drivers/media/video/cx18/cx18-mailbox.c @@ -136,7 +136,7 @@ static void cx18_mdl_send_to_dvb(struct cx18_stream *s, struct cx18_mdl *mdl) { struct cx18_buffer *buf; - if (!s->dvb.enabled || mdl->bytesused == 0) + if (s->dvb == NULL || !s->dvb->enabled || mdl->bytesused == 0) return; /* We ignore mdl and buf readpos accounting here - it doesn't matter */ @@ -146,7 +146,7 @@ static void cx18_mdl_send_to_dvb(struct cx18_stream *s, struct cx18_mdl *mdl) buf = list_first_entry(&mdl->buf_list, struct cx18_buffer, list); if (buf->bytesused) - dvb_dmx_swfilter(&s->dvb.demux, + dvb_dmx_swfilter(&s->dvb->demux, buf->buf, buf->bytesused); return; } @@ -154,7 +154,7 @@ static void cx18_mdl_send_to_dvb(struct cx18_stream *s, struct cx18_mdl *mdl) list_for_each_entry(buf, &mdl->buf_list, list) { if (buf->bytesused == 0) break; - dvb_dmx_swfilter(&s->dvb.demux, buf->buf, buf->bytesused); + dvb_dmx_swfilter(&s->dvb->demux, buf->buf, buf->bytesused); } } diff --git a/drivers/media/video/cx18/cx18-streams.c b/drivers/media/video/cx18/cx18-streams.c index ab461e27d9d..94f5d7967c5 100644 --- a/drivers/media/video/cx18/cx18-streams.c +++ b/drivers/media/video/cx18/cx18-streams.c @@ -107,6 +107,7 @@ static void cx18_stream_init(struct cx18 *cx, int type) s->video_dev = video_dev; /* initialize cx18_stream fields */ + s->dvb = NULL; s->cx = cx; s->type = type; s->name = cx18_stream_info[type].name; @@ -140,10 +141,15 @@ static int cx18_prep_dev(struct cx18 *cx, int type) int num_offset = cx18_stream_info[type].num_offset; int num = cx->instance + cx18_first_minor + num_offset; - /* These four fields are always initialized. If video_dev == NULL, then - this stream is not in use. In that case no other fields but these - four can be used. */ + /* + * These five fields are always initialized. + * For analog capture related streams, if video_dev == NULL then the + * stream is not in use. + * For the TS stream, if dvb == NULL then the stream is not in use. + * In those cases no other fields but these four can be used. + */ s->video_dev = NULL; + s->dvb = NULL; s->cx = cx; s->type = type; s->name = cx18_stream_info[type].name; @@ -167,6 +173,21 @@ static int cx18_prep_dev(struct cx18 *cx, int type) cx18_stream_init(cx, type); + /* Allocate the cx18_dvb struct only for the TS on cards with DTV */ + if (type == CX18_ENC_STREAM_TYPE_TS) { + if (cx->card->hw_all & CX18_HW_DVB) { + s->dvb = kzalloc(sizeof(struct cx18_dvb), GFP_KERNEL); + if (s->dvb == NULL) { + CX18_ERR("Couldn't allocate cx18_dvb structure" + " for %s\n", s->name); + return -ENOMEM; + } + } else { + /* Don't need buffers for the TS, if there is no DVB */ + s->buffers = 0; + } + } + if (num_offset == -1) return 0; @@ -222,13 +243,7 @@ static int cx18_reg_dev(struct cx18 *cx, int type) const char *name; int num, ret; - /* TODO: Shouldn't this be a VFL_TYPE_TRANSPORT or something? - * We need a VFL_TYPE_TS defined. - */ - if (strcmp("TS", s->name) == 0) { - /* just return if no DVB is supported */ - if ((cx->card->hw_all & CX18_HW_DVB) == 0) - return 0; + if (type == CX18_ENC_STREAM_TYPE_TS && s->dvb != NULL) { ret = cx18_dvb_register(s); if (ret < 0) { CX18_ERR("DVB failed to register\n"); @@ -320,11 +335,13 @@ void cx18_streams_cleanup(struct cx18 *cx, int unregister) /* Teardown all streams */ for (type = 0; type < CX18_MAX_STREAMS; type++) { - /* No struct video_device, but can have buffers allocated */ + /* The TS has a cx18_dvb structure, not a video_device */ if (type == CX18_ENC_STREAM_TYPE_TS) { - if (cx->streams[type].dvb.enabled) { - cx18_dvb_unregister(&cx->streams[type]); - cx->streams[type].dvb.enabled = false; + if (cx->streams[type].dvb != NULL) { + if (unregister) + cx18_dvb_unregister(&cx->streams[type]); + kfree(cx->streams[type].dvb); + cx->streams[type].dvb = NULL; cx18_stream_free(&cx->streams[type]); } continue; diff --git a/drivers/media/video/cx18/cx18-streams.h b/drivers/media/video/cx18/cx18-streams.h index 77412bee596..51765eb12d3 100644 --- a/drivers/media/video/cx18/cx18-streams.h +++ b/drivers/media/video/cx18/cx18-streams.h @@ -33,7 +33,8 @@ void cx18_stream_rotate_idx_mdls(struct cx18 *cx); static inline bool cx18_stream_enabled(struct cx18_stream *s) { - return s->video_dev || s->dvb.enabled || + return s->video_dev || + (s->dvb && s->dvb->enabled) || (s->type == CX18_ENC_STREAM_TYPE_IDX && s->cx->stream_buffers[CX18_ENC_STREAM_TYPE_IDX] != 0); } -- 2.43.2