Reading VCO rate for this PLL can cause boot stalls, if it is not
enabled. Guard clk_hw_get_rate with a call to
dsi_pll_28nm_clk_is_enabled().
Signed-off-by: Dmitry Baryshkov <dmitry.barysh...@linaro.org>
---
drivers/gpu/drm/msm/dsi/pll/dsi_pll_28nm.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/msm/dsi/pll/dsi_pll_28nm.c
b/drivers/gpu/drm/msm/dsi/pll/dsi_pll_28nm.c
index 6dffd7f4a99b..37a1f996a588 100644
--- a/drivers/gpu/drm/msm/dsi/pll/dsi_pll_28nm.c
+++ b/drivers/gpu/drm/msm/dsi/pll/dsi_pll_28nm.c
@@ -447,7 +447,10 @@ static void dsi_pll_28nm_save_state(struct msm_dsi_pll
*pll)
cached_state->postdiv1 =
pll_read(base + REG_DSI_28nm_PHY_PLL_POSTDIV1_CFG);
cached_state->byte_mux = pll_read(base + REG_DSI_28nm_PHY_PLL_VREG_CFG);
- cached_state->vco_rate = clk_hw_get_rate(&pll->clk_hw);
+ if (dsi_pll_28nm_clk_is_enabled(&pll->clk_hw))
+ cached_state->vco_rate = clk_hw_get_rate(&pll->clk_hw);
+ else
+ cached_state->vco_rate = 0;
}
static int dsi_pll_28nm_restore_state(struct msm_dsi_pll *pll)
--
2.28.0
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