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Commit 92b9ac78f934616d08c72747607bfb0fa51ee52d

Authored by Clemens Ladisch
Committed by Jaroslav Kysela
1 parent eb995a8c82
Exists in master and in 7 other branches imx_3.0.35_4.1.0, imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga, smarc-l5.0.0_1.0.0-ga

[ALSA] usb-audio: increase number of packets per URB 

To decrease the USB interrupts rate, increase both the default and the
maximum number of packets per URB.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

Showing 1 changed file with 2 additions and 2 deletions Side-by-side Diff

sound/usb/usbaudio.c
Diff comments   View file @ 92b9ac7
... ... @@ -68,7 +68,7 @@
68 68 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable this card */
69 69 static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Vendor ID for this card */
70 70 static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Product ID for this card */
71   -static int nrpacks = 4; /* max. number of packets per urb */
  71 +static int nrpacks = 8; /* max. number of packets per urb */
72 72 static int async_unlink = 1;
73 73 static int device_setup[SNDRV_CARDS]; /* device parameter for this card*/
74 74  
... ... @@ -100,7 +100,7 @@
100 100 *
101 101 */
102 102  
103   -#define MAX_PACKS 10
  103 +#define MAX_PACKS 20
104 104 #define MAX_PACKS_HS (MAX_PACKS * 8) /* in high speed mode */
105 105 #define MAX_URBS 8
106 106 #define SYNC_URBS 4 /* always four urbs for sync */