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UBUNTU: SAUCE: platform/x86: dell-uart-backlight: increase retry times

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BugLink: https://bugs.launchpad.net/bugs/1862885

From ODM, scalar takes some time to activate panel during booting up,
it can't respond the UART commands within 1 seconds.
So, we add retry and wait 2 seconds for the response. But sometimes it
still fails to read the response.
During the boot up time, it sometimes takes more than 2 seconds to respond
the first command, so we enlarge the retry timeout from 2 seconds to 5
seconds to make sure we get the first response from scalar.

Signed-off-by: AceLan Kao <acelan.kao@canonical.com>
Acked-By: You-Sheng Yang <vicamo.yang@canonical.com>
Acked-by: Anthony Wong <anthony.wong@canonical.com>
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
This commit is contained in:
AceLan Kao
2020-02-12 14:53:15 +08:00
committed by Paolo Pisati
parent 095b600a5e
commit e713ebea4a
1 changed files with 1 additions and 1 deletions
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drivers/platform/x86/dell/dell-uart-backlight.c
+1 -1
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@@ -318,7 +318,7 @@ static int dell_uart_get_scalar_status(struct dell_uart_backlight *dell_pdata)
struct dell_uart_bl_cmd *bl_cmd = &uart_cmd[DELL_UART_GET_SCALAR];
struct uart_8250_port *uart = serial8250_get_port(dell_pdata->line);
int rx_len;
int status = 0, retry = 20;
int status = 0, retry = 50;
dell_uart_dump_cmd(__func__, "tx: ", bl_cmd->cmd, bl_cmd->tx_len);