diff options
Diffstat (limited to 'drivers/media/video/pvrusb2/pvrusb2-context.c')
| -rw-r--r-- | drivers/media/video/pvrusb2/pvrusb2-context.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/drivers/media/video/pvrusb2/pvrusb2-context.c b/drivers/media/video/pvrusb2/pvrusb2-context.c index a2ce022c515..b5db6a5bab3 100644 --- a/drivers/media/video/pvrusb2/pvrusb2-context.c +++ b/drivers/media/video/pvrusb2/pvrusb2-context.c @@ -245,6 +245,22 @@ struct pvr2_context *pvr2_context_create( } +static void pvr2_context_reset_input_limits(struct pvr2_context *mp) +{ + unsigned int tmsk,mmsk; + struct pvr2_channel *cp; + struct pvr2_hdw *hdw = mp->hdw; + mmsk = pvr2_hdw_get_input_available(hdw); + tmsk = mmsk; + for (cp = mp->mc_first; cp; cp = cp->mc_next) { + if (!cp->input_mask) continue; + tmsk &= cp->input_mask; + } + pvr2_hdw_set_input_allowed(hdw,mmsk,tmsk); + pvr2_hdw_commit_ctl(hdw); +} + + static void pvr2_context_enter(struct pvr2_context *mp) { mutex_lock(&mp->mutex); @@ -300,7 +316,9 @@ void pvr2_channel_done(struct pvr2_channel *cp) { struct pvr2_context *mp = cp->mc_head; pvr2_context_enter(mp); + cp->input_mask = 0; pvr2_channel_disclaim_stream(cp); + pvr2_context_reset_input_limits(mp); if (cp->mc_next) { cp->mc_next->mc_prev = cp->mc_prev; } else { @@ -316,6 +334,57 @@ void pvr2_channel_done(struct pvr2_channel *cp) } +int pvr2_channel_limit_inputs(struct pvr2_channel *cp,unsigned int cmsk) +{ + unsigned int tmsk,mmsk; + int ret = 0; + struct pvr2_channel *p2; + struct pvr2_hdw *hdw = cp->hdw; + + mmsk = pvr2_hdw_get_input_available(hdw); + cmsk &= mmsk; + if (cmsk == cp->input_mask) { + /* No change; nothing to do */ + return 0; + } + + pvr2_context_enter(cp->mc_head); + do { + if (!cmsk) { + cp->input_mask = 0; + pvr2_context_reset_input_limits(cp->mc_head); + break; + } + tmsk = mmsk; + for (p2 = cp->mc_head->mc_first; p2; p2 = p2->mc_next) { + if (p2 == cp) continue; + if (!p2->input_mask) continue; + tmsk &= p2->input_mask; + } + if (!(tmsk & cmsk)) { + ret = -EPERM; + break; + } + tmsk &= cmsk; + if ((ret = pvr2_hdw_set_input_allowed(hdw,mmsk,tmsk)) != 0) { + /* Internal failure changing allowed list; probably + should not happen, but react if it does. */ + break; + } + cp->input_mask = cmsk; + pvr2_hdw_commit_ctl(hdw); + } while (0); + pvr2_context_exit(cp->mc_head); + return ret; +} + + +unsigned int pvr2_channel_get_limited_inputs(struct pvr2_channel *cp) +{ + return cp->input_mask; +} + + int pvr2_channel_claim_stream(struct pvr2_channel *cp, struct pvr2_context_stream *sp) { |