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NVIDIA: SAUCE: usb: gadget: tegra-xudc: Reduce ping.LFPS trepeat for U1 exit reliability

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We observed that some hosts may fail to exit U1 due to a U1 ping timeout.
By adjusting the SSPX_CORE_CNT27_PING_LFPS_TRPT parameter to reduce
the ping.LFPS trepeat value, the time is reduced from 300ms to 200ms and
improve the reliability of U1 exit in these scenarios.

http://nvbugs/4758552

Signed-off-by: Wayne Chang <waynec@nvidia.com>
Reviewed-by: WK Tsai <wtsai@nvidia.com>
Reviewed-by: HaoTien Hsu <haotienh@nvidia.com>
Reviewed-by: Henry Lin <henryl@nvidia.com>
Signed-off-by: Vishwaroop A <va@nvidia.com>
Acked-by: Noah Wager <noah.wager@canonical.com>
Acked-by: Jacob Martin <jacob.martin@canonical.com>
Signed-off-by: Noah Wager <noah.wager@canonical.com>
This commit is contained in:
Wayne Chang
2024-08-30 07:04:39 +00:00
committed by Noah Wager
parent d3157ee1dc
commit 493e4cf00e
1 changed files with 9 additions and 0 deletions
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drivers/usb/gadget/udc/tegra-xudc.c
+9
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@@ -3562,6 +3562,15 @@ static void tegra264_xudc_device_params_init(struct tegra_xudc *xudc)
val |= SSPX_CORE_CNT13_CRDTHP_TIMER(0x33);
xudc_writel(xudc, val, SSPX_CORE_CNT13);
#define SSPX_CORE_CNT27 0x407c
#define SSPX_CORE_CNT27_PING_LFPS_TRPT_MASK GENMASK(29, 0)
#define SSPX_CORE_CNT27_PING_LFPS_TRPT(x) ((x) & \
SSPX_CORE_CNT27_PING_LFPS_TRPT_MASK)
val = xudc_readl(xudc, SSPX_CORE_CNT27);
val &= ~(SSPX_CORE_CNT27_PING_LFPS_TRPT_MASK);
val |= SSPX_CORE_CNT27_PING_LFPS_TRPT(0x7a1200);
xudc_writel(xudc, val, SSPX_CORE_CNT27);
#define SSPX_CORE_CNT30 0x4088
#define SSPX_CORE_CNT30_LMPITP_TIMER_MASK GENMASK(11, 0)
#define SSPX_CORE_CNT30_LMPITP_TIMER(x) ((x) & \