| Message ID | 003901cd7502$abac1ba0$030452e0$%han@samsung.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
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@samsung.com> 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); -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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);
This patch checks time loop for RPLY_RECEIV which means that AUX channel command reply is received. Signed-off-by: Jingoo Han <jg1.han@samsung.com> --- drivers/video/exynos/exynos_dp_reg.c | 10 +++++++++- 1 files changed, 9 insertions(+), 1 deletions(-)