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Message-Id: <20210215162805.21481-1-jonathan@marek.ca>
Date:   Mon, 15 Feb 2021 11:27:44 -0500
From:   Jonathan Marek <jonathan@...ek.ca>
To:     freedreno@...ts.freedesktop.org
Cc:     Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Douglas Anderson <dianders@...omium.org>,
        Kalyan Thota <kalyan_t@...eaurora.org>,
        Jordan Crouse <jcrouse@...eaurora.org>,
        "Kristian H. Kristensen" <hoegsberg@...gle.com>,
        Sam Ravnborg <sam@...nborg.org>,
        Rikard Falkeborn <rikard.falkeborn@...il.com>,
        Emil Velikov <emil.velikov@...labora.com>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Rajendra Nayak <rnayak@...eaurora.org>,
        Konrad Dybcio <konradybcio@...il.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Dave Airlie <airlied@...hat.com>,
        linux-arm-msm@...r.kernel.org (open list:DRM DRIVER FOR MSM ADRENO GPU),
        dri-devel@...ts.freedesktop.org (open list:DRM DRIVER FOR MSM ADRENO
        GPU),
        devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED
        DEVICE TREE BINDINGS), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH] drm/msm/dsi: support CPHY mode for 7nm pll/phy

Add the required changes to support 7nm pll/phy in CPHY mode.

This adds a "qcom,dsi-phy-cphy-mode" property for the PHY node to enable
the CPHY mode.

Signed-off-by: Jonathan Marek <jonathan@...ek.ca>
---
 .../devicetree/bindings/display/msm/dsi.txt   |  1 +
 drivers/gpu/drm/msm/dsi/dsi.c                 | 12 +--
 drivers/gpu/drm/msm/dsi/dsi.h                 |  6 +-
 drivers/gpu/drm/msm/dsi/dsi.xml.h             |  2 +
 drivers/gpu/drm/msm/dsi/dsi_host.c            | 34 +++++--
 drivers/gpu/drm/msm/dsi/phy/dsi_phy.c         | 49 +++++++++-
 drivers/gpu/drm/msm/dsi/phy/dsi_phy.h         |  3 +
 drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c     | 89 ++++++++++++++-----
 drivers/gpu/drm/msm/dsi/pll/dsi_pll.c         |  4 +-
 drivers/gpu/drm/msm/dsi/pll/dsi_pll.h         |  5 +-
 drivers/gpu/drm/msm/dsi/pll/dsi_pll_7nm.c     | 71 +++++++++------
 11 files changed, 210 insertions(+), 66 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/msm/dsi.txt b/Documentation/devicetree/bindings/display/msm/dsi.txt
index b9a64d3ff184..7ffc86a9816b 100644
--- a/Documentation/devicetree/bindings/display/msm/dsi.txt
+++ b/Documentation/devicetree/bindings/display/msm/dsi.txt
@@ -124,6 +124,7 @@ Required properties:
 Optional properties:
 - qcom,dsi-phy-regulator-ldo-mode: Boolean value indicating if the LDO mode PHY
   regulator is wanted.
+- qcom,dsi-phy-cphy-mode: Boolean value indicating if CPHY mode is wanted.
 - qcom,mdss-mdp-transfer-time-us:	Specifies the dsi transfer time for command mode
 					panels in microseconds. Driver uses this number to adjust
 					the clock rate according to the expected transfer time.
diff --git a/drivers/gpu/drm/msm/dsi/dsi.c b/drivers/gpu/drm/msm/dsi/dsi.c
index 627048851d99..68d8547f7264 100644
--- a/drivers/gpu/drm/msm/dsi/dsi.c
+++ b/drivers/gpu/drm/msm/dsi/dsi.c
@@ -13,7 +13,7 @@ struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi)
 	return msm_dsi->encoder;
 }
 
-static int dsi_get_phy(struct msm_dsi *msm_dsi)
+static int dsi_get_phy(struct msm_dsi *msm_dsi, bool *cphy_mode)
 {
 	struct platform_device *pdev = msm_dsi->pdev;
 	struct platform_device *phy_pdev;
@@ -29,6 +29,7 @@ static int dsi_get_phy(struct msm_dsi *msm_dsi)
 	if (phy_pdev)
 		msm_dsi->phy = platform_get_drvdata(phy_pdev);
 
+	*cphy_mode = of_property_read_bool(phy_node, "qcom,dsi-phy-cphy-mode");
 	of_node_put(phy_node);
 
 	if (!phy_pdev || !msm_dsi->phy) {
@@ -65,6 +66,7 @@ static void dsi_destroy(struct msm_dsi *msm_dsi)
 static struct msm_dsi *dsi_init(struct platform_device *pdev)
 {
 	struct msm_dsi *msm_dsi;
+	bool cphy_mode;
 	int ret;
 
 	if (!pdev)
@@ -79,13 +81,13 @@ static struct msm_dsi *dsi_init(struct platform_device *pdev)
 	msm_dsi->pdev = pdev;
 	platform_set_drvdata(pdev, msm_dsi);
 
-	/* Init dsi host */
-	ret = msm_dsi_host_init(msm_dsi);
+	/* GET dsi PHY */
+	ret = dsi_get_phy(msm_dsi, &cphy_mode);
 	if (ret)
 		goto destroy_dsi;
 
-	/* GET dsi PHY */
-	ret = dsi_get_phy(msm_dsi);
+	/* Init dsi host */
+	ret = msm_dsi_host_init(msm_dsi, cphy_mode);
 	if (ret)
 		goto destroy_dsi;
 
diff --git a/drivers/gpu/drm/msm/dsi/dsi.h b/drivers/gpu/drm/msm/dsi/dsi.h
index 78ef5d4ed922..8db4edc286ee 100644
--- a/drivers/gpu/drm/msm/dsi/dsi.h
+++ b/drivers/gpu/drm/msm/dsi/dsi.h
@@ -108,7 +108,7 @@ struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi);
 struct msm_dsi_pll;
 #ifdef CONFIG_DRM_MSM_DSI_PLL
 struct msm_dsi_pll *msm_dsi_pll_init(struct platform_device *pdev,
-			enum msm_dsi_phy_type type, int dsi_id);
+			enum msm_dsi_phy_type type, bool cphy_mode, int id);
 void msm_dsi_pll_destroy(struct msm_dsi_pll *pll);
 int msm_dsi_pll_get_clk_provider(struct msm_dsi_pll *pll,
 	struct clk **byte_clk_provider, struct clk **pixel_clk_provider);
@@ -118,7 +118,7 @@ int msm_dsi_pll_set_usecase(struct msm_dsi_pll *pll,
 			    enum msm_dsi_phy_usecase uc);
 #else
 static inline struct msm_dsi_pll *msm_dsi_pll_init(struct platform_device *pdev,
-			 enum msm_dsi_phy_type type, int id) {
+			 enum msm_dsi_phy_type type, bool cphy_mode, int id) {
 	return ERR_PTR(-ENODEV);
 }
 static inline void msm_dsi_pll_destroy(struct msm_dsi_pll *pll)
@@ -177,7 +177,7 @@ void msm_dsi_host_get_phy_clk_req(struct mipi_dsi_host *host,
 void msm_dsi_host_destroy(struct mipi_dsi_host *host);
 int msm_dsi_host_modeset_init(struct mipi_dsi_host *host,
 					struct drm_device *dev);
-int msm_dsi_host_init(struct msm_dsi *msm_dsi);
+int msm_dsi_host_init(struct msm_dsi *msm_dsi, bool cphy_mode);
 int msm_dsi_runtime_suspend(struct device *dev);
 int msm_dsi_runtime_resume(struct device *dev);
 int dsi_link_clk_set_rate_6g(struct msm_dsi_host *msm_host);
diff --git a/drivers/gpu/drm/msm/dsi/dsi.xml.h b/drivers/gpu/drm/msm/dsi/dsi.xml.h
index 50eb4d1b8fdd..5087a65d3e11 100644
--- a/drivers/gpu/drm/msm/dsi/dsi.xml.h
+++ b/drivers/gpu/drm/msm/dsi/dsi.xml.h
@@ -621,6 +621,8 @@ static inline uint32_t DSI_VERSION_MAJOR(uint32_t val)
 	return ((val) << DSI_VERSION_MAJOR__SHIFT) & DSI_VERSION_MAJOR__MASK;
 }
 
+#define REG_DSI_CPHY_MODE_CTRL					0x000002d4
+
 #define REG_DSI_PHY_PLL_CTRL_0					0x00000200
 #define DSI_PHY_PLL_CTRL_0_ENABLE				0x00000001
 
diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
index ab281cba0f08..39346817a27a 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_host.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
@@ -168,6 +168,9 @@ struct msm_dsi_host {
 	int dlane_swap;
 	int num_data_lanes;
 
+	/* from phy DT */
+	bool cphy_mode;
+
 	u32 dma_cmd_ctrl_restore;
 
 	bool registered;
@@ -511,6 +514,7 @@ int msm_dsi_runtime_resume(struct device *dev)
 
 int dsi_link_clk_set_rate_6g(struct msm_dsi_host *msm_host)
 {
+	u32 byte_intf_rate;
 	int ret;
 
 	DBG("Set clk rates: pclk=%d, byteclk=%d",
@@ -530,8 +534,13 @@ int dsi_link_clk_set_rate_6g(struct msm_dsi_host *msm_host)
 	}
 
 	if (msm_host->byte_intf_clk) {
-		ret = clk_set_rate(msm_host->byte_intf_clk,
-				   msm_host->byte_clk_rate / 2);
+		/* For CPHY, byte_intf_clk is same as byte_clk */
+		if (msm_host->cphy_mode)
+			byte_intf_rate = msm_host->byte_clk_rate;
+		else
+			byte_intf_rate = msm_host->byte_clk_rate / 2;
+
+		ret = clk_set_rate(msm_host->byte_intf_clk, byte_intf_rate);
 		if (ret) {
 			pr_err("%s: Failed to set rate byte intf clk, %d\n",
 			       __func__, ret);
@@ -711,7 +720,11 @@ static void dsi_calc_pclk(struct msm_dsi_host *msm_host, bool is_dual_dsi)
 		lanes = 1;
 	}
 
-	do_div(pclk_bpp, (8 * lanes));
+	/* CPHY "byte_clk" is in units of 16 bits */
+	if (msm_host->cphy_mode)
+		do_div(pclk_bpp, (16 * lanes));
+	else
+		do_div(pclk_bpp, (8 * lanes));
 
 	msm_host->pixel_clk_rate = pclk_rate;
 	msm_host->byte_clk_rate = pclk_bpp;
@@ -937,6 +950,9 @@ static void dsi_ctrl_config(struct msm_dsi_host *msm_host, bool enable,
 	data |= DSI_CTRL_ENABLE;
 
 	dsi_write(msm_host, REG_DSI_CTRL, data);
+
+	if (msm_host->cphy_mode)
+		dsi_write(msm_host, REG_DSI_CPHY_MODE_CTRL, BIT(0));
 }
 
 static void dsi_timing_setup(struct msm_dsi_host *msm_host, bool is_dual_dsi)
@@ -1818,7 +1834,7 @@ static int dsi_host_get_id(struct msm_dsi_host *msm_host)
 	return -EINVAL;
 }
 
-int msm_dsi_host_init(struct msm_dsi *msm_dsi)
+int msm_dsi_host_init(struct msm_dsi *msm_dsi, bool cphy_mode)
 {
 	struct msm_dsi_host *msm_host = NULL;
 	struct platform_device *pdev = msm_dsi->pdev;
@@ -1833,6 +1849,7 @@ int msm_dsi_host_init(struct msm_dsi *msm_dsi)
 	}
 
 	msm_host->pdev = pdev;
+	msm_host->cphy_mode = cphy_mode;
 	msm_dsi->host = &msm_host->base;
 
 	ret = dsi_host_parse_dt(msm_host);
@@ -2303,7 +2320,14 @@ void msm_dsi_host_get_phy_clk_req(struct mipi_dsi_host *host,
 		return;
 	}
 
-	clk_req->bitclk_rate = msm_host->byte_clk_rate * 8;
+	/* CPHY transmits 16 bits over 7 clock cycles
+	 * "byte_clk" is in units of 16-bits (see dsi_calc_pclk),
+	 * so multiply by 7 to get the "bitclk rate"
+	 */
+	if (msm_host->cphy_mode)
+		clk_req->bitclk_rate = msm_host->byte_clk_rate * 7;
+	else
+		clk_req->bitclk_rate = msm_host->byte_clk_rate * 8;
 	clk_req->escclk_rate = msm_host->esc_clk_rate;
 }
 
diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
index e8c1a727179c..c8b758ab259a 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
@@ -460,6 +460,51 @@ int msm_dsi_dphy_timing_calc_v4(struct msm_dsi_dphy_timing *timing,
 	return 0;
 }
 
+int msm_dsi_cphy_timing_calc_v4(struct msm_dsi_dphy_timing *timing,
+	struct msm_dsi_phy_clk_request *clk_req)
+{
+	const unsigned long bit_rate = clk_req->bitclk_rate;
+	const unsigned long esc_rate = clk_req->escclk_rate;
+	s32 ui, ui_x7;
+	s32 tmax, tmin;
+	s32 coeff = 1000; /* Precision, should avoid overflow */
+	s32 temp;
+
+	if (!bit_rate || !esc_rate)
+		return -EINVAL;
+
+	ui = mult_frac(NSEC_PER_MSEC, coeff, bit_rate / 1000);
+	ui_x7 = ui * 7;
+
+	temp = S_DIV_ROUND_UP(38 * coeff, ui_x7);
+	tmin = max_t(s32, temp, 0);
+	temp = (95 * coeff) / ui_x7;
+	tmax = max_t(s32, temp, 0);
+	timing->clk_prepare = linear_inter(tmax, tmin, 50, 0, false);
+
+	tmin = DIV_ROUND_UP(50 * coeff, ui_x7);
+	tmax = 255;
+	timing->hs_rqst = linear_inter(tmax, tmin, 1, 0, false);
+
+	tmin = DIV_ROUND_UP(100 * coeff, ui_x7) - 1;
+	tmax = 255;
+	timing->hs_exit = linear_inter(tmax, tmin, 10, 0, false);
+
+	tmin = 1;
+	tmax = 32;
+	timing->shared_timings.clk_post = linear_inter(tmax, tmin, 80, 0, false);
+
+	tmin = min_t(s32, 64, S_DIV_ROUND_UP(262 * coeff, ui_x7) - 1);
+	tmax = 64;
+	timing->shared_timings.clk_pre = linear_inter(tmax, tmin, 20, 0, false);
+
+	DBG("%d, %d, %d, %d, %d",
+		timing->shared_timings.clk_pre, timing->shared_timings.clk_post,
+		timing->clk_prepare, timing->hs_exit, timing->hs_rqst);
+
+	return 0;
+}
+
 void msm_dsi_phy_set_src_pll(struct msm_dsi_phy *phy, int pll_id, u32 reg,
 				u32 bit_mask)
 {
@@ -683,6 +728,8 @@ static int dsi_phy_driver_probe(struct platform_device *pdev)
 
 	phy->regulator_ldo_mode = of_property_read_bool(dev->of_node,
 				"qcom,dsi-phy-regulator-ldo-mode");
+	phy->cphy_mode = of_property_read_bool(dev->of_node,
+				"qcom,dsi-phy-cphy-mode");
 
 	phy->base = msm_ioremap(pdev, "dsi_phy", "DSI_PHY");
 	if (IS_ERR(phy->base)) {
@@ -715,7 +762,7 @@ static int dsi_phy_driver_probe(struct platform_device *pdev)
 	if (ret)
 		goto fail;
 
-	phy->pll = msm_dsi_pll_init(pdev, phy->cfg->type, phy->id);
+	phy->pll = msm_dsi_pll_init(pdev, phy->cfg->type, phy->cphy_mode, phy->id);
 	if (IS_ERR_OR_NULL(phy->pll)) {
 		DRM_DEV_INFO(dev,
 			"%s: pll init failed: %ld, need separate pll clk driver\n",
diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h
index d2bd74b6f357..699d3d4a8ba8 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h
@@ -89,6 +89,7 @@ struct msm_dsi_phy {
 
 	enum msm_dsi_phy_usecase usecase;
 	bool regulator_ldo_mode;
+	bool cphy_mode;
 
 	struct msm_dsi_pll *pll;
 };
@@ -104,6 +105,8 @@ int msm_dsi_dphy_timing_calc_v3(struct msm_dsi_dphy_timing *timing,
 				struct msm_dsi_phy_clk_request *clk_req);
 int msm_dsi_dphy_timing_calc_v4(struct msm_dsi_dphy_timing *timing,
 				struct msm_dsi_phy_clk_request *clk_req);
+int msm_dsi_cphy_timing_calc_v4(struct msm_dsi_dphy_timing *timing,
+				struct msm_dsi_phy_clk_request *clk_req);
 void msm_dsi_phy_set_src_pll(struct msm_dsi_phy *phy, int pll_id, u32 reg,
 				u32 bit_mask);
 int msm_dsi_phy_init_common(struct msm_dsi_phy *phy);
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 79c034ae075d..69291babd871 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
@@ -79,15 +79,21 @@ static int dsi_7nm_phy_enable(struct msm_dsi_phy *phy, int src_pll_id,
 	struct msm_dsi_dphy_timing *timing = &phy->timing;
 	void __iomem *base = phy->base;
 	bool less_than_1500_mhz;
-	u32 vreg_ctrl_0, glbl_str_swi_cal_sel_ctrl, glbl_hstx_str_ctrl_0;
+	u32 vreg_ctrl_0, vreg_ctrl_1, lane_ctrl0;
+	u32 glbl_pemph_ctrl_0;
+	u32 glbl_str_swi_cal_sel_ctrl, glbl_hstx_str_ctrl_0;
 	u32 glbl_rescode_top_ctrl, glbl_rescode_bot_ctrl;
 	u32 data;
 
 	DBG("");
 
-	if (msm_dsi_dphy_timing_calc_v4(timing, clk_req)) {
+	if (phy->cphy_mode)
+		ret = msm_dsi_cphy_timing_calc_v4(timing, clk_req);
+	else
+		ret = msm_dsi_dphy_timing_calc_v4(timing, clk_req);
+	if (ret) {
 		DRM_DEV_ERROR(&phy->pdev->dev,
-			"%s: D-PHY timing calculation failed\n", __func__);
+			"%s: PHY timing calculation failed\n", __func__);
 		return -EINVAL;
 	}
 
@@ -108,6 +114,10 @@ static int dsi_7nm_phy_enable(struct msm_dsi_phy *phy, int src_pll_id,
 	/* Alter PHY configurations if data rate less than 1.5GHZ*/
 	less_than_1500_mhz = (clk_req->bitclk_rate <= 1500000000);
 
+	/* For C-PHY, no low power settings for lower clk rate */
+	if (phy->cphy_mode)
+		less_than_1500_mhz = false;
+
 	if (phy->cfg->type == MSM_DSI_PHY_7NM_V4_1) {
 		vreg_ctrl_0 = less_than_1500_mhz ? 0x53 : 0x52;
 		glbl_rescode_top_ctrl = less_than_1500_mhz ? 0x3d :  0x00;
@@ -122,6 +132,17 @@ static int dsi_7nm_phy_enable(struct msm_dsi_phy *phy, int src_pll_id,
 		glbl_rescode_bot_ctrl = 0x3c;
 	}
 
+	if (phy->cphy_mode) {
+		vreg_ctrl_0 = 0x51;
+		vreg_ctrl_1 = 0x55;
+		glbl_pemph_ctrl_0 = 0x11;
+		lane_ctrl0 = 0x17;
+	} else {
+		vreg_ctrl_1 = 0x5c;
+		glbl_pemph_ctrl_0 = 0x00;
+		lane_ctrl0 = 0x1f;
+	}
+
 	/* de-assert digital and pll power down */
 	data = BIT(6) | BIT(5);
 	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_CTRL_0, data);
@@ -142,15 +163,22 @@ static int dsi_7nm_phy_enable(struct msm_dsi_phy *phy, int src_pll_id,
 	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_LANE_CFG0, 0x21);
 	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_LANE_CFG1, 0x84);
 
+	if (phy->cphy_mode)
+		dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_CTRL, BIT(6));
+
 	/* Enable LDO */
 	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_VREG_CTRL_0, vreg_ctrl_0);
-	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_VREG_CTRL_1, 0x5c);
+	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_VREG_CTRL_1, vreg_ctrl_1);
+
 	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_CTRL_3, 0x00);
 	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_STR_SWI_CAL_SEL_CTRL,
 		      glbl_str_swi_cal_sel_ctrl);
 	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_HSTX_STR_CTRL_0,
 		      glbl_hstx_str_ctrl_0);
-	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_PEMPH_CTRL_0, 0x00);
+	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_PEMPH_CTRL_0,
+		      glbl_pemph_ctrl_0);
+	if (phy->cphy_mode)
+		dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_PEMPH_CTRL_1, 0x01);
 	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_RESCODE_OFFSET_TOP_CTRL,
 		      glbl_rescode_top_ctrl);
 	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_RESCODE_OFFSET_BOT_CTRL,
@@ -160,10 +188,11 @@ static int dsi_7nm_phy_enable(struct msm_dsi_phy *phy, int src_pll_id,
 	/* Remove power down from all blocks */
 	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_CTRL_0, 0x7f);
 
-	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_LANE_CTRL0, 0x1f);
+	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_LANE_CTRL0, lane_ctrl0);
 
 	/* Select full-rate mode */
-	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_CTRL_2, 0x40);
+	if (!phy->cphy_mode)
+		dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_CTRL_2, 0x40);
 
 	ret = msm_dsi_pll_set_usecase(phy->pll, phy->usecase);
 	if (ret) {
@@ -173,22 +202,36 @@ static int dsi_7nm_phy_enable(struct msm_dsi_phy *phy, int src_pll_id,
 	}
 
 	/* DSI PHY timings */
-	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_0, 0x00);
-	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_1, timing->clk_zero);
-	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_2, timing->clk_prepare);
-	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_3, timing->clk_trail);
-	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_4, timing->hs_exit);
-	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_5, timing->hs_zero);
-	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_6, timing->hs_prepare);
-	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_7, timing->hs_trail);
-	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_8, timing->hs_rqst);
-	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_9, 0x02);
-	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_10, 0x04);
-	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_11, 0x00);
-	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_12,
-		      timing->shared_timings.clk_pre);
-	dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_13,
-		      timing->shared_timings.clk_post);
+	if (phy->cphy_mode) {
+		dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_0, 0x00);
+		dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_4, timing->hs_exit);
+		dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_5,
+			timing->shared_timings.clk_pre);
+		dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_6, timing->clk_prepare);
+		dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_7,
+			timing->shared_timings.clk_post);
+		dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_8, timing->hs_rqst);
+		dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_9, 0x02);
+		dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_10, 0x04);
+		dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_11, 0x00);
+	} else {
+		dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_0, 0x00);
+		dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_1, timing->clk_zero);
+		dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_2, timing->clk_prepare);
+		dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_3, timing->clk_trail);
+		dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_4, timing->hs_exit);
+		dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_5, timing->hs_zero);
+		dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_6, timing->hs_prepare);
+		dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_7, timing->hs_trail);
+		dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_8, timing->hs_rqst);
+		dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_9, 0x02);
+		dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_10, 0x04);
+		dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_11, 0x00);
+		dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_12,
+			timing->shared_timings.clk_pre);
+		dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_13,
+			timing->shared_timings.clk_post);
+	}
 
 	/* DSI lane settings */
 	dsi_phy_hw_v4_0_lane_settings(phy);
diff --git a/drivers/gpu/drm/msm/dsi/pll/dsi_pll.c b/drivers/gpu/drm/msm/dsi/pll/dsi_pll.c
index a45fe95aff49..9ad9a8774982 100644
--- a/drivers/gpu/drm/msm/dsi/pll/dsi_pll.c
+++ b/drivers/gpu/drm/msm/dsi/pll/dsi_pll.c
@@ -142,7 +142,7 @@ int msm_dsi_pll_set_usecase(struct msm_dsi_pll *pll,
 }
 
 struct msm_dsi_pll *msm_dsi_pll_init(struct platform_device *pdev,
-			enum msm_dsi_phy_type type, int id)
+			enum msm_dsi_phy_type type, bool cphy_mode, int id)
 {
 	struct device *dev = &pdev->dev;
 	struct msm_dsi_pll *pll;
@@ -163,7 +163,7 @@ struct msm_dsi_pll *msm_dsi_pll_init(struct platform_device *pdev,
 		break;
 	case MSM_DSI_PHY_7NM:
 	case MSM_DSI_PHY_7NM_V4_1:
-		pll = msm_dsi_pll_7nm_init(pdev, id);
+		pll = msm_dsi_pll_7nm_init(pdev, cphy_mode, id);
 		break;
 	default:
 		pll = ERR_PTR(-ENXIO);
diff --git a/drivers/gpu/drm/msm/dsi/pll/dsi_pll.h b/drivers/gpu/drm/msm/dsi/pll/dsi_pll.h
index 3405982a092c..d8d3e5b09053 100644
--- a/drivers/gpu/drm/msm/dsi/pll/dsi_pll.h
+++ b/drivers/gpu/drm/msm/dsi/pll/dsi_pll.h
@@ -117,10 +117,11 @@ msm_dsi_pll_10nm_init(struct platform_device *pdev, int id)
 }
 #endif
 #ifdef CONFIG_DRM_MSM_DSI_7NM_PHY
-struct msm_dsi_pll *msm_dsi_pll_7nm_init(struct platform_device *pdev, int id);
+struct msm_dsi_pll *
+msm_dsi_pll_7nm_init(struct platform_device *pdev, bool cphy_mode, int id);
 #else
 static inline struct msm_dsi_pll *
-msm_dsi_pll_7nm_init(struct platform_device *pdev, int id)
+msm_dsi_pll_7nm_init(struct platform_device *pdev, bool cphy_mode, int id)
 {
 	return ERR_PTR(-ENODEV);
 }
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 93bf142e4a4e..edc1fb491bc7 100644
--- a/drivers/gpu/drm/msm/dsi/pll/dsi_pll_7nm.c
+++ b/drivers/gpu/drm/msm/dsi/pll/dsi_pll_7nm.c
@@ -86,6 +86,7 @@ struct pll_7nm_cached_state {
 
 struct dsi_pll_7nm {
 	struct msm_dsi_pll base;
+	bool cphy_mode;
 
 	int id;
 	struct platform_device *pdev;
@@ -327,7 +328,7 @@ static void dsi_pll_commit(struct dsi_pll_7nm *pll)
 	pll_write(base + REG_DSI_7nm_PHY_PLL_FRAC_DIV_START_HIGH_1, reg->frac_div_start_high);
 	pll_write(base + REG_DSI_7nm_PHY_PLL_PLL_LOCKDET_RATE_1, 0x40);
 	pll_write(base + REG_DSI_7nm_PHY_PLL_PLL_LOCK_DELAY, 0x06);
-	pll_write(base + REG_DSI_7nm_PHY_PLL_CMODE_1, 0x10); /* TODO: 0x00 for CPHY */
+	pll_write(base + REG_DSI_7nm_PHY_PLL_CMODE_1, pll->cphy_mode ? 0x00 : 0x10);
 	pll_write(base + REG_DSI_7nm_PHY_PLL_CLOCK_INVERTERS, reg->pll_clock_inverters);
 }
 
@@ -668,7 +669,8 @@ static void dsi_pll_7nm_destroy(struct msm_dsi_pll *pll)
 	of_clk_del_provider(dev->of_node);
 
 	clk_hw_unregister_divider(pll_7nm->out_dsiclk_hw);
-	clk_hw_unregister_mux(pll_7nm->pclk_mux_hw);
+	if (pll_7nm->pclk_mux_hw)
+		clk_hw_unregister_mux(pll_7nm->pclk_mux_hw);
 	clk_hw_unregister_fixed_factor(pll_7nm->post_out_div_clk_hw);
 	clk_hw_unregister_fixed_factor(pll_7nm->by_2_bit_clk_hw);
 	clk_hw_unregister_fixed_factor(pll_7nm->byte_clk_hw);
@@ -751,7 +753,8 @@ static int pll_7nm_register(struct dsi_pll_7nm *pll_7nm)
 
 	/* DSI Byte clock = VCO_CLK / OUT_DIV / BIT_DIV / 8 */
 	hw = clk_hw_register_fixed_factor(dev, clk_name, parent,
-					  CLK_SET_RATE_PARENT, 1, 8);
+					  CLK_SET_RATE_PARENT, 1,
+					  pll_7nm->cphy_mode ? 7 : 8);
 	if (IS_ERR(hw)) {
 		ret = PTR_ERR(hw);
 		goto err_bit_clk_hw;
@@ -775,8 +778,10 @@ static int pll_7nm_register(struct dsi_pll_7nm *pll_7nm)
 	snprintf(clk_name, 32, "dsi%d_pll_post_out_div_clk", pll_7nm->id);
 	snprintf(parent, 32, "dsi%d_pll_out_div_clk", pll_7nm->id);
 
-	hw = clk_hw_register_fixed_factor(dev, clk_name, parent,
-					  0, 1, 4);
+	if (pll_7nm->cphy_mode)
+		hw = clk_hw_register_fixed_factor(dev, clk_name, parent, 0, 2, 7);
+	else
+		hw = clk_hw_register_fixed_factor(dev, clk_name, parent, 0, 1, 4);
 	if (IS_ERR(hw)) {
 		ret = PTR_ERR(hw);
 		goto err_by_2_bit_clk_hw;
@@ -784,27 +789,40 @@ static int pll_7nm_register(struct dsi_pll_7nm *pll_7nm)
 
 	pll_7nm->post_out_div_clk_hw = hw;
 
-	snprintf(clk_name, 32, "dsi%d_pclk_mux", pll_7nm->id);
-	snprintf(parent, 32, "dsi%d_pll_bit_clk", pll_7nm->id);
-	snprintf(parent2, 32, "dsi%d_pll_by_2_bit_clk", pll_7nm->id);
-	snprintf(parent3, 32, "dsi%d_pll_out_div_clk", pll_7nm->id);
-	snprintf(parent4, 32, "dsi%d_pll_post_out_div_clk", pll_7nm->id);
-
-	hw = clk_hw_register_mux(dev, clk_name,
-				 ((const char *[]){
-				 parent, parent2, parent3, parent4
-				 }), 4, 0, pll_7nm->phy_cmn_mmio +
-				 REG_DSI_7nm_PHY_CMN_CLK_CFG1,
-				 0, 2, 0, NULL);
-	if (IS_ERR(hw)) {
-		ret = PTR_ERR(hw);
-		goto err_post_out_div_clk_hw;
+	/* in CPHY mode, pclk_mux will always have post_out_div as parent
+	 * don't register a pclk_mux clock and just use post_out_div instead
+	 */
+	if (pll_7nm->cphy_mode) {
+		void __iomem *base = pll_7nm->phy_cmn_mmio;
+		u32 data;
+
+		data = pll_read(base + REG_DSI_7nm_PHY_CMN_CLK_CFG1);
+		pll_write(base + REG_DSI_7nm_PHY_CMN_CLK_CFG1, data | 3);
+
+		snprintf(parent, 32, "dsi%d_pll_post_out_div_clk", pll_7nm->id);
+	} else {
+		snprintf(clk_name, 32, "dsi%d_pclk_mux", pll_7nm->id);
+		snprintf(parent, 32, "dsi%d_pll_bit_clk", pll_7nm->id);
+		snprintf(parent2, 32, "dsi%d_pll_by_2_bit_clk", pll_7nm->id);
+		snprintf(parent3, 32, "dsi%d_pll_out_div_clk", pll_7nm->id);
+		snprintf(parent4, 32, "dsi%d_pll_post_out_div_clk", pll_7nm->id);
+
+		hw = clk_hw_register_mux(dev, clk_name,
+					((const char *[]){
+					parent, parent2, parent3, parent4
+					}), 4, 0, pll_7nm->phy_cmn_mmio +
+					REG_DSI_7nm_PHY_CMN_CLK_CFG1,
+					0, 2, 0, NULL);
+		if (IS_ERR(hw)) {
+			ret = PTR_ERR(hw);
+			goto err_post_out_div_clk_hw;
+		}
+
+		pll_7nm->pclk_mux_hw = hw;
+		snprintf(parent, 32, "dsi%d_pclk_mux", pll_7nm->id);
 	}
 
-	pll_7nm->pclk_mux_hw = hw;
-
 	snprintf(clk_name, 32, "dsi%d_phy_pll_out_dsiclk", pll_7nm->id);
-	snprintf(parent, 32, "dsi%d_pclk_mux", pll_7nm->id);
 
 	/* PIX CLK DIV : DIV_CTRL_7_4*/
 	hw = clk_hw_register_divider(dev, clk_name, parent,
@@ -835,7 +853,8 @@ static int pll_7nm_register(struct dsi_pll_7nm *pll_7nm)
 err_dsiclk_hw:
 	clk_hw_unregister_divider(pll_7nm->out_dsiclk_hw);
 err_pclk_mux_hw:
-	clk_hw_unregister_mux(pll_7nm->pclk_mux_hw);
+	if (pll_7nm->pclk_mux_hw)
+		clk_hw_unregister_mux(pll_7nm->pclk_mux_hw);
 err_post_out_div_clk_hw:
 	clk_hw_unregister_fixed_factor(pll_7nm->post_out_div_clk_hw);
 err_by_2_bit_clk_hw:
@@ -852,7 +871,8 @@ static int pll_7nm_register(struct dsi_pll_7nm *pll_7nm)
 	return ret;
 }
 
-struct msm_dsi_pll *msm_dsi_pll_7nm_init(struct platform_device *pdev, int id)
+struct msm_dsi_pll *
+msm_dsi_pll_7nm_init(struct platform_device *pdev, bool cphy_mode, int id)
 {
 	struct dsi_pll_7nm *pll_7nm;
 	struct msm_dsi_pll *pll;
@@ -865,6 +885,7 @@ struct msm_dsi_pll *msm_dsi_pll_7nm_init(struct platform_device *pdev, int id)
 	DBG("DSI PLL%d", id);
 
 	pll_7nm->pdev = pdev;
+	pll_7nm->cphy_mode = cphy_mode;
 	pll_7nm->id = id;
 	pll_7nm_list[id] = pll_7nm;
 
-- 
2.26.1

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