On 08/08/2012 01:10 AM, Jingoo Han wrote:
> This patch checks time loop for RPLY_RECEIV which means that
> AUX channel command reply is received.
>
> Signed-off-by: Jingoo Han <jg1.han@xxxxxxxxxxx>
Applied.
Thanks,
Florian Tobias Schandinat
> ---
> drivers/video/exynos/exynos_dp_reg.c | 10 +++++++++-
> 1 files changed, 9 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/video/exynos/exynos_dp_reg.c b/drivers/video/exynos/exynos_dp_reg.c
> index 2db5b9a..174c445 100644
> --- a/drivers/video/exynos/exynos_dp_reg.c
> +++ b/drivers/video/exynos/exynos_dp_reg.c
> @@ -401,6 +401,7 @@ int exynos_dp_start_aux_transaction(struct exynos_dp_device *dp)
> {
> int reg;
> int retval = 0;
> + int timeout_loop = 0;
>
> /* Enable AUX CH operation */
> reg = readl(dp->reg_base + EXYNOS_DP_AUX_CH_CTL_2);
> @@ -409,8 +410,15 @@ int exynos_dp_start_aux_transaction(struct exynos_dp_device *dp)
>
> /* Is AUX CH command reply received? */
> reg = readl(dp->reg_base + EXYNOS_DP_INT_STA);
> - while (!(reg & RPLY_RECEIV))
> + while (!(reg & RPLY_RECEIV)) {
> + timeout_loop++;
> + if (DP_TIMEOUT_LOOP_COUNT < timeout_loop) {
> + dev_err(dp->dev, "AUX CH command reply failed!\n");
> + return -ETIMEDOUT;
> + }
> reg = readl(dp->reg_base + EXYNOS_DP_INT_STA);
> + usleep_range(10, 11);
> + }
>
> /* Clear interrupt source for AUX CH command reply */
> writel(RPLY_RECEIV, dp->reg_base + EXYNOS_DP_INT_STA);
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