diff options
Diffstat (limited to 'drivers/video/imx/hdp/API_General.c')
| -rw-r--r-- | drivers/video/imx/hdp/API_General.c | 27 |
1 files changed, 20 insertions, 7 deletions
diff --git a/drivers/video/imx/hdp/API_General.c b/drivers/video/imx/hdp/API_General.c index f52e994b24..4f08c2be74 100644 --- a/drivers/video/imx/hdp/API_General.c +++ b/drivers/video/imx/hdp/API_General.c @@ -264,14 +264,27 @@ CDN_API_STATUS cdn_api_get_debug_reg_val(uint16_t *val) CDN_API_STATUS cdn_api_checkalive(void) { - static unsigned int alive; - unsigned int newalive; - if (cdn_apb_read(KEEP_ALIVE << 2, &newalive)) + unsigned int alive, newalive; + uint8_t retries_left = 10; + + if (cdn_apb_read(KEEP_ALIVE << 2, &alive)) return CDN_ERR; - if (alive == newalive) - return CDN_BSY; - alive = newalive; - return CDN_OK; + + while (retries_left--) { + udelay(1); + + if (cdn_apb_read(KEEP_ALIVE << 2, &newalive)) + return CDN_ERR; + + if (alive == newalive) + continue; + + return CDN_OK; + } + + printf("%s: keep-alive counter did not increment for 10us...\n", __func__); + + return CDN_BSY; } CDN_API_STATUS cdn_api_checkalive_blocking(void) |