diff options
| author | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2020-10-15 22:03:31 +0300 |
|---|---|---|
| committer | Rob Clark <robdclark@chromium.org> | 2020-11-04 19:26:26 +0300 |
| commit | b66ccc571319627931e3e61a72747329387eab45 (patch) | |
| tree | 8d97283e36d408b5acdb6b5692419f3fd3d3f5d4 /drivers/gpu/drm/msm/dsi | |
| parent | a4ccc37693a271330a46208afbeaed939d54fdbb (diff) | |
| download | linux-b66ccc571319627931e3e61a72747329387eab45.tar.xz | |
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: 1ef7c99d145c ("drm/msm/dsi: add support for 7nm DSI PHY/PLL")
Signed-off-by: Rob Clark <robdclark@chromium.org>
Diffstat (limited to 'drivers/gpu/drm/msm/dsi')
| -rw-r--r-- | drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c index 255b5f5ab2ce..79c034ae075d 100644 --- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c @@ -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) |