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drm/msm/dsi_phy_7nm: implement PHY disabling 

Implement phy_disable() callback to disable DSI PHY lanes and blocks
when phy is not used.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Fixes: 1ef7c99d14 ("drm/msm/dsi: add support for 7nm DSI PHY/PLL")
Signed-off-by: Rob Clark <robdclark@chromium.org>
This commit is contained in:
Dmitry Baryshkov 2020-10-15 22:03:31 +03:00 committed by Rob Clark
parent a4ccc37693
commit b66ccc5713
1 changed files with 22 additions and 1 deletions
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23
drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
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@ -200,7 +200,28 @@ static int dsi_7nm_phy_enable(struct msm_dsi_phy *phy, int src_pll_id,
static void dsi_7nm_phy_disable(struct msm_dsi_phy *phy)
{
/* TODO */
void __iomem *base = phy->base;
u32 data;
DBG("");
if (dsi_phy_hw_v4_0_is_pll_on(phy))
pr_warn("Turning OFF PHY while PLL is on\n");
dsi_phy_hw_v4_0_config_lpcdrx(phy, false);
data = dsi_phy_read(base + REG_DSI_7nm_PHY_CMN_CTRL_0);
/* disable all lanes */
data &= ~0x1F;
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_CTRL_0, data);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_LANE_CTRL0, 0);
/* Turn off all PHY blocks */
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_CTRL_0, 0x00);
/* make sure phy is turned off */
wmb();
DBG("DSI%d PHY disabled", phy->id);
}
static int dsi_7nm_phy_init(struct msm_dsi_phy *phy)