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video: exynos_dp: check DP PLL Lock status
DP PLL Lock status should be checked in order to prevent unlocked PLL. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
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@ -271,6 +271,7 @@ void exynos_dp_set_analog_power_down(struct exynos_dp_device *dp,
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void exynos_dp_init_analog_func(struct exynos_dp_device *dp)
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{
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u32 reg;
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int timeout_loop = 0;
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exynos_dp_set_analog_power_down(dp, POWER_ALL, 0);
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@ -282,9 +283,19 @@ void exynos_dp_init_analog_func(struct exynos_dp_device *dp)
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writel(reg, dp->reg_base + EXYNOS_DP_DEBUG_CTL);
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/* Power up PLL */
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if (exynos_dp_get_pll_lock_status(dp) == PLL_UNLOCKED)
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if (exynos_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) {
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exynos_dp_set_pll_power_down(dp, 0);
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while (exynos_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) {
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timeout_loop++;
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if (DP_TIMEOUT_LOOP_COUNT < timeout_loop) {
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dev_err(dp->dev, "failed to get pll lock status\n");
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return;
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}
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usleep_range(10, 20);
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}
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}
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/* Enable Serdes FIFO function and Link symbol clock domain module */
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reg = readl(dp->reg_base + EXYNOS_DP_FUNC_EN_2);
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reg &= ~(SERDES_FIFO_FUNC_EN_N | LS_CLK_DOMAIN_FUNC_EN_N
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