| Message ID | 20201030151207.766857-1-dmitry.baryshkov@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm/msm/dsi: do not try reading 28nm vco rate if it's not enabled | expand |
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)
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.baryshkov@linaro.org> --- drivers/gpu/drm/msm/dsi/pll/dsi_pll_28nm.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)