diff options
Diffstat (limited to 'drivers/video/exynos')
| -rw-r--r-- | drivers/video/exynos/exynos_dp_core.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/video/exynos/exynos_dp_core.c b/drivers/video/exynos/exynos_dp_core.c index 7161f9f86c9f..d60f8da720d1 100644 --- a/drivers/video/exynos/exynos_dp_core.c +++ b/drivers/video/exynos/exynos_dp_core.c @@ -265,7 +265,7 @@ static void exynos_dp_set_lane_lane_pre_emphasis(struct exynos_dp_device *dp, static int exynos_dp_link_start(struct exynos_dp_device *dp) { u8 buf[4]; - int lane, lane_count, retval; + int lane, lane_count, pll_tries, retval; lane_count = dp->link_train.lane_count; @@ -298,6 +298,18 @@ static int exynos_dp_link_start(struct exynos_dp_device *dp) exynos_dp_set_lane_lane_pre_emphasis(dp, PRE_EMPHASIS_LEVEL_0, lane); + /* Wait for PLL lock */ + pll_tries = 0; + while (exynos_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) { + if (pll_tries == DP_TIMEOUT_LOOP_COUNT) { + dev_err(dp->dev, "Wait for PLL lock timed out\n"); + return -ETIMEDOUT; + } + + pll_tries++; + usleep_range(90, 120); + } + /* Set training pattern 1 */ exynos_dp_set_training_pattern(dp, TRAINING_PTN1); |