diff options
| -rw-r--r-- | drivers/clk/msm/mdss/mdss-dsi-pll-8998.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/clk/msm/mdss/mdss-dsi-pll-8998.c b/drivers/clk/msm/mdss/mdss-dsi-pll-8998.c index 79e5aa16989b..eb69ed35f46d 100644 --- a/drivers/clk/msm/mdss/mdss-dsi-pll-8998.c +++ b/drivers/clk/msm/mdss/mdss-dsi-pll-8998.c @@ -634,7 +634,6 @@ error: static void dsi_pll_disable_sub(struct mdss_pll_resources *rsc) { - dsi_pll_disable_global_clk(rsc); MDSS_PLL_REG_W(rsc->phy_base, PHY_CMN_RBUF_CTRL, 0); dsi_pll_disable_pll_bias(rsc); } @@ -653,11 +652,20 @@ static void dsi_pll_disable(struct dsi_pll_vco_clk *vco) pr_debug("stop PLL (%d)\n", rsc->index); + /* + * To avoid any stray glitches while + * abruptly powering down the PLL + * make sure to gate the clock using + * the clock enable bit before powering + * down the PLL + **/ + dsi_pll_disable_global_clk(rsc); MDSS_PLL_REG_W(rsc->phy_base, PHY_CMN_PLL_CNTRL, 0); dsi_pll_disable_sub(rsc); - if (rsc->slave) + if (rsc->slave) { + dsi_pll_disable_global_clk(rsc->slave); dsi_pll_disable_sub(rsc->slave); - + } /* flush, ensure all register writes are done*/ wmb(); rsc->pll_on = false; |