[PATCH 1/4] drm/msm/dsi_pll_7nm: restore VCO rate during restore_state

[PATCH 1/4] drm/msm/dsi_pll_7nm: restore VCO rate during restore_state

[Dmitry Baryshkov]

PHY disable/enable resets PLL registers to default values. Thus in
addition to restoring several registers we also need to restore VCO rate
settings.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Fixes: 1ef7c99d145c ("drm/msm/dsi: add support for 7nm DSI PHY/PLL")
---
 drivers/gpu/drm/msm/dsi/pll/dsi_pll_7nm.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/msm/dsi/pll/dsi_pll_7nm.c b/drivers/gpu/drm/msm/dsi/pll/dsi_pll_7nm.c
index de0dfb815125..93bf142e4a4e 100644
--- a/drivers/gpu/drm/msm/dsi/pll/dsi_pll_7nm.c
+++ b/drivers/gpu/drm/msm/dsi/pll/dsi_pll_7nm.c
@@ -585,6 +585,7 @@ static int dsi_pll_7nm_restore_state(struct msm_dsi_pll *pll)
 	struct pll_7nm_cached_state *cached = &pll_7nm->cached_state;
 	void __iomem *phy_base = pll_7nm->phy_cmn_mmio;
 	u32 val;
+	int ret;
 
 	val = pll_read(pll_7nm->mmio + REG_DSI_7nm_PHY_PLL_PLL_OUTDIV_RATE);
 	val &= ~0x3;
@@ -599,6 +600,13 @@ static int dsi_pll_7nm_restore_state(struct msm_dsi_pll *pll)
 	val |= cached->pll_mux;
 	pll_write(phy_base + REG_DSI_7nm_PHY_CMN_CLK_CFG1, val);
 
+	ret = dsi_pll_7nm_vco_set_rate(&pll->clk_hw, pll_7nm->vco_current_rate, pll_7nm->vco_ref_clk_rate);
+	if (ret) {
+		DRM_DEV_ERROR(&pll_7nm->pdev->dev,
+			"restore vco rate failed. ret=%d\n", ret);
+		return ret;
+	}
+
 	DBG("DSI PLL%d", pll_7nm->id);
 
 	return 0;
-- 
2.28.0

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[PATCH 2/4] drm/msm/dsi_pll_10nm: restore VCO rate during restore_state

[Dmitry Baryshkov]

PHY disable/enable resets PLL registers to default values. Thus in
addition to restoring several registers we also need to restore VCO rate
settings.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Fixes: c6659785dfb3 ("drm/msm/dsi/pll: call vco set rate explicitly")
---
 drivers/gpu/drm/msm/dsi/pll/dsi_pll_10nm.c | 8 ++++++++
 1 file changed, 8 insertions(+)

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 6ac04fc303f5..e4e9bf04b736 100644
--- a/drivers/gpu/drm/msm/dsi/pll/dsi_pll_10nm.c
+++ b/drivers/gpu/drm/msm/dsi/pll/dsi_pll_10nm.c
@@ -559,6 +559,7 @@ static int dsi_pll_10nm_restore_state(struct msm_dsi_pll *pll)
 	struct pll_10nm_cached_state *cached = &pll_10nm->cached_state;
 	void __iomem *phy_base = pll_10nm->phy_cmn_mmio;
 	u32 val;
+	int ret;
 
 	val = pll_read(pll_10nm->mmio + REG_DSI_10nm_PHY_PLL_PLL_OUTDIV_RATE);
 	val &= ~0x3;
@@ -573,6 +574,13 @@ static int dsi_pll_10nm_restore_state(struct msm_dsi_pll *pll)
 	val |= cached->pll_mux;
 	pll_write(phy_base + REG_DSI_10nm_PHY_CMN_CLK_CFG1, val);
 
+	ret = dsi_pll_10nm_vco_set_rate(&pll->clk_hw, pll_10nm->vco_current_rate, pll_10nm->vco_ref_clk_rate);
+	if (ret) {
+		DRM_DEV_ERROR(&pll_10nm->pdev->dev,
+			"restore vco rate failed. ret=%d\n", ret);
+		return ret;
+	}
+
 	DBG("DSI PLL%d", pll_10nm->id);
 
 	return 0;
-- 
2.28.0

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[PATCH 3/4] drm/msm/dsi_phy_7nm: implement PHY disabling

[Dmitry Baryshkov]

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")
---
 drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

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)
-- 
2.28.0

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[PATCH 4/4] drm/msm/dsi_phy_10nm: implement PHY disabling

[Dmitry Baryshkov]

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: ff73ff194060 ("drm/msm/dsi: Populate the 10nm PHY funcs")
---
 drivers/gpu/drm/msm/dsi/phy/dsi_phy_10nm.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_10nm.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_10nm.c
index 47403d4f2d28..d1b92d4dc197 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_10nm.c
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_10nm.c
@@ -192,6 +192,28 @@ static int dsi_10nm_phy_enable(struct msm_dsi_phy *phy, int src_pll_id,
 
 static void dsi_10nm_phy_disable(struct msm_dsi_phy *phy)
 {
+	void __iomem *base = phy->base;
+	u32 data;
+
+	DBG("");
+
+	if (dsi_phy_hw_v3_0_is_pll_on(phy))
+		pr_warn("Turning OFF PHY while PLL is on\n");
+
+	dsi_phy_hw_v3_0_config_lpcdrx(phy, false);
+	data = dsi_phy_read(base + REG_DSI_10nm_PHY_CMN_CTRL_0);
+
+	/* disable all lanes */
+	data &= ~0x1F;
+	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_CTRL_0, data);
+	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_LANE_CTRL0, 0);
+
+	/* Turn off all PHY blocks */
+	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_CTRL_0, 0x00);
+	/* make sure phy is turned off */
+	wmb();
+
+	DBG("DSI%d PHY disabled", phy->id);
 }
 
 static int dsi_10nm_phy_init(struct msm_dsi_phy *phy)
-- 
2.28.0

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