Commit 0e720ea8 authored by Dmitry Baryshkov's avatar Dmitry Baryshkov Committed by Rob Clark
Browse files

drm/msm/dsi: do not try reading 28nm vco rate if it's not enabled 



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: default avatarDmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: default avatarRob Clark <robdclark@chromium.org>
parent 5785dd7a

drivers/gpu/drm/msm/dsi/pll/dsi_pll_28nm.c

+4 −1
Original line number Diff line number Diff line
@@ -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);

	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)