diff options
| author | Harigovindan P <harigovi@codeaurora.org> | 2020-02-06 14:42:01 +0530 |
|---|---|---|
| committer | Rob Clark <robdclark@chromium.org> | 2020-02-13 13:49:52 -0800 |
| commit | c6659785dfb3f8d75f1fe637e4222ff8178f5280 (patch) | |
| tree | 72c89f97d95c47587fad7e817a21d1631a9d1d71 /drivers/gpu | |
| parent | a1028dcfd0dd97884072288d0c8ed7f30399b528 (diff) | |
| download | linux-c6659785dfb3f8d75f1fe637e4222ff8178f5280.tar.bz2 | |
drm/msm/dsi/pll: call vco set rate explicitly
For a given byte clock, if VCO recalc value is exactly same as
vco set rate value, vco_set_rate does not get called assuming
VCO is already set to required value. But Due to GDSC toggle,
VCO values are erased in the HW. To make sure VCO is programmed
correctly, we forcefully call set_rate from vco_prepare.
Signed-off-by: Harigovindan P <harigovi@codeaurora.org>
Reviewed-by: Jeffrey Hugo <jeffrey.l.hugo@gmail.com>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/msm/dsi/pll/dsi_pll_10nm.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/dsi/pll/dsi_pll_10nm.c b/drivers/gpu/drm/msm/dsi/pll/dsi_pll_10nm.c index 1c894548dd72..6ac04fc303f5 100644 --- a/drivers/gpu/drm/msm/dsi/pll/dsi_pll_10nm.c +++ b/drivers/gpu/drm/msm/dsi/pll/dsi_pll_10nm.c @@ -411,6 +411,12 @@ static int dsi_pll_10nm_vco_prepare(struct clk_hw *hw) if (pll_10nm->slave) dsi_pll_enable_pll_bias(pll_10nm->slave); + rc = dsi_pll_10nm_vco_set_rate(hw,pll_10nm->vco_current_rate, 0); + if (rc) { + pr_err("vco_set_rate failed, rc=%d\n", rc); + return rc; + } + /* Start PLL */ pll_write(pll_10nm->phy_cmn_mmio + REG_DSI_10nm_PHY_CMN_PLL_CNTRL, 0x01); |