[PATCH v3 10/10] drm/bridge: cdns: Convert to phy framework

From: Maxime Ripard <maxime.ripard@bootlin.com>
To: Kishon Vijay Abraham I <kishon@ti.com>,
	Boris Brezillon <boris.brezillon@bootlin.com>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
	Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
	linux-media@vger.kernel.org,
	Archit Taneja <architt@codeaurora.org>,
	Andrzej Hajda <a.hajda@samsung.com>, Chen-Yu Tsai <wens@csie.org>,
	linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
	linux-arm-kernel@lists.infradead.org,
	Krzysztof Witos <kwitos@cadence.com>,
	Rafal Ciepiela <rafalc@cadence.com>,
	Maxime Ripard <maxime.ripard@bootlin.com>
Subject: [PATCH v3 10/10] drm/bridge: cdns: Convert to phy framework
Date: Fri,  7 Dec 2018 14:55:37 +0100	[thread overview]
Message-ID: <64bda0631842bf10ca140cd562b71feea2f98ff2.1544190837.git-series.maxime.ripard@bootlin.com> (raw)
In-Reply-To: <cover.ad7c4feb3905658f10b022df4756a5ade280011f.1544190837.git-series.maxime.ripard@bootlin.com>

Now that we have everything we need in the phy framework to allow to tune
the phy parameters, let's convert the Cadence DSI bridge to that API
instead of creating a ad-hoc driver for its phy.

Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
---
 drivers/gpu/drm/bridge/cdns-dsi.c | 485 +++----------------------------
 1 file changed, 59 insertions(+), 426 deletions(-)

diff --git a/drivers/gpu/drm/bridge/cdns-dsi.c b/drivers/gpu/drm/bridge/cdns-dsi.c
index 3ac6dd524b6d..7b432257ffbe 100644
--- a/drivers/gpu/drm/bridge/cdns-dsi.c
+++ b/drivers/gpu/drm/bridge/cdns-dsi.c
@@ -21,6 +21,9 @@
 #include <linux/pm_runtime.h>
 #include <linux/reset.h>
 
+#include <linux/phy/phy.h>
+#include <linux/phy/phy-mipi-dphy.h>
+
 #define IP_CONF				0x0
 #define SP_HS_FIFO_DEPTH(x)		(((x) & GENMASK(30, 26)) >> 26)
 #define SP_LP_FIFO_DEPTH(x)		(((x) & GENMASK(25, 21)) >> 21)
@@ -419,44 +422,11 @@
 #define DSI_NULL_FRAME_OVERHEAD		6
 #define DSI_EOT_PKT_SIZE		4
 
-#define REG_WAKEUP_TIME_NS		800
-#define DPHY_PLL_RATE_HZ		108000000
-
-/* DPHY registers */
-#define DPHY_PMA_CMN(reg)		(reg)
-#define DPHY_PMA_LCLK(reg)		(0x100 + (reg))
-#define DPHY_PMA_LDATA(lane, reg)	(0x200 + ((lane) * 0x100) + (reg))
-#define DPHY_PMA_RCLK(reg)		(0x600 + (reg))
-#define DPHY_PMA_RDATA(lane, reg)	(0x700 + ((lane) * 0x100) + (reg))
-#define DPHY_PCS(reg)			(0xb00 + (reg))
-
-#define DPHY_CMN_SSM			DPHY_PMA_CMN(0x20)
-#define DPHY_CMN_SSM_EN			BIT(0)
-#define DPHY_CMN_TX_MODE_EN		BIT(9)
-
-#define DPHY_CMN_PWM			DPHY_PMA_CMN(0x40)
-#define DPHY_CMN_PWM_DIV(x)		((x) << 20)
-#define DPHY_CMN_PWM_LOW(x)		((x) << 10)
-#define DPHY_CMN_PWM_HIGH(x)		(x)
-
-#define DPHY_CMN_FBDIV			DPHY_PMA_CMN(0x4c)
-#define DPHY_CMN_FBDIV_VAL(low, high)	(((high) << 11) | ((low) << 22))
-#define DPHY_CMN_FBDIV_FROM_REG		(BIT(10) | BIT(21))
-
-#define DPHY_CMN_OPIPDIV		DPHY_PMA_CMN(0x50)
-#define DPHY_CMN_IPDIV_FROM_REG		BIT(0)
-#define DPHY_CMN_IPDIV(x)		((x) << 1)
-#define DPHY_CMN_OPDIV_FROM_REG		BIT(6)
-#define DPHY_CMN_OPDIV(x)		((x) << 7)
-
-#define DPHY_PSM_CFG			DPHY_PCS(0x4)
-#define DPHY_PSM_CFG_FROM_REG		BIT(0)
-#define DPHY_PSM_CLK_DIV(x)		((x) << 1)
-
 struct cdns_dsi_output {
 	struct mipi_dsi_device *dev;
 	struct drm_panel *panel;
 	struct drm_bridge *bridge;
+	union phy_configure_opts phy_opts;
 };
 
 enum cdns_dsi_input_id {
@@ -465,14 +435,6 @@ enum cdns_dsi_input_id {
 	CDNS_DSC_INPUT,
 };
 
-struct cdns_dphy_cfg {
-	u8 pll_ipdiv;
-	u8 pll_opdiv;
-	u16 pll_fbdiv;
-	unsigned long lane_bps;
-	unsigned int nlanes;
-};
-
 struct cdns_dsi_cfg {
 	unsigned int hfp;
 	unsigned int hsa;
@@ -481,34 +443,6 @@ struct cdns_dsi_cfg {
 	unsigned int htotal;
 };
 
-struct cdns_dphy;
-
-enum cdns_dphy_clk_lane_cfg {
-	DPHY_CLK_CFG_LEFT_DRIVES_ALL = 0,
-	DPHY_CLK_CFG_LEFT_DRIVES_RIGHT = 1,
-	DPHY_CLK_CFG_LEFT_DRIVES_LEFT = 2,
-	DPHY_CLK_CFG_RIGHT_DRIVES_ALL = 3,
-};
-
-struct cdns_dphy_ops {
-	int (*probe)(struct cdns_dphy *dphy);
-	void (*remove)(struct cdns_dphy *dphy);
-	void (*set_psm_div)(struct cdns_dphy *dphy, u8 div);
-	void (*set_clk_lane_cfg)(struct cdns_dphy *dphy,
-				 enum cdns_dphy_clk_lane_cfg cfg);
-	void (*set_pll_cfg)(struct cdns_dphy *dphy,
-			    const struct cdns_dphy_cfg *cfg);
-	unsigned long (*get_wakeup_time_ns)(struct cdns_dphy *dphy);
-};
-
-struct cdns_dphy {
-	struct cdns_dphy_cfg cfg;
-	void __iomem *regs;
-	struct clk *psm_clk;
-	struct clk *pll_ref_clk;
-	const struct cdns_dphy_ops *ops;
-};
-
 struct cdns_dsi_input {
 	enum cdns_dsi_input_id id;
 	struct drm_bridge bridge;
@@ -526,7 +460,7 @@ struct cdns_dsi {
 	struct reset_control *dsi_p_rst;
 	struct clk *dsi_sys_clk;
 	bool link_initialized;
-	struct cdns_dphy *dphy;
+	struct phy *dphy;
 };
 
 static inline struct cdns_dsi *input_to_dsi(struct cdns_dsi_input *input)
@@ -550,175 +484,6 @@ static unsigned int mode_to_dpi_hfp(const struct drm_display_mode *mode)
 	return mode->crtc_hsync_start - mode->crtc_hdisplay;
 }
 
-static int cdns_dsi_get_dphy_pll_cfg(struct cdns_dphy *dphy,
-				     struct cdns_dphy_cfg *cfg,
-				     unsigned int dpi_htotal,
-				     unsigned int dpi_bpp,
-				     unsigned int dpi_hz,
-				     unsigned int dsi_htotal,
-				     unsigned int dsi_nlanes,
-				     unsigned int *dsi_hfp_ext)
-{
-	u64 dlane_bps, dlane_bps_max, fbdiv, fbdiv_max, adj_dsi_htotal;
-	unsigned long pll_ref_hz = clk_get_rate(dphy->pll_ref_clk);
-
-	memset(cfg, 0, sizeof(*cfg));
-
-	cfg->nlanes = dsi_nlanes;
-
-	if (pll_ref_hz < 9600000 || pll_ref_hz >= 150000000)
-		return -EINVAL;
-	else if (pll_ref_hz < 19200000)
-		cfg->pll_ipdiv = 1;
-	else if (pll_ref_hz < 38400000)
-		cfg->pll_ipdiv = 2;
-	else if (pll_ref_hz < 76800000)
-		cfg->pll_ipdiv = 4;
-	else
-		cfg->pll_ipdiv = 8;
-
-	/*
-	 * Make sure DSI htotal is aligned on a lane boundary when calculating
-	 * the expected data rate. This is done by extending HFP in case of
-	 * misalignment.
-	 */
-	adj_dsi_htotal = dsi_htotal;
-	if (dsi_htotal % dsi_nlanes)
-		adj_dsi_htotal += dsi_nlanes - (dsi_htotal % dsi_nlanes);
-
-	dlane_bps = (u64)dpi_hz * adj_dsi_htotal;
-
-	/* data rate in bytes/sec is not an integer, refuse the mode. */
-	if (do_div(dlane_bps, dsi_nlanes * dpi_htotal))
-		return -EINVAL;
-
-	/* data rate was in bytes/sec, convert to bits/sec. */
-	dlane_bps *= 8;
-
-	if (dlane_bps > 2500000000UL || dlane_bps < 160000000UL)
-		return -EINVAL;
-	else if (dlane_bps >= 1250000000)
-		cfg->pll_opdiv = 1;
-	else if (dlane_bps >= 630000000)
-		cfg->pll_opdiv = 2;
-	else if (dlane_bps >= 320000000)
-		cfg->pll_opdiv = 4;
-	else if (dlane_bps >= 160000000)
-		cfg->pll_opdiv = 8;
-
-	/*
-	 * Allow a deviation of 0.2% on the per-lane data rate to try to
-	 * recover a potential mismatch between DPI and PPI clks.
-	 */
-	dlane_bps_max = dlane_bps + DIV_ROUND_DOWN_ULL(dlane_bps, 500);
-	fbdiv_max = DIV_ROUND_DOWN_ULL(dlane_bps_max * 2 *
-				       cfg->pll_opdiv * cfg->pll_ipdiv,
-				       pll_ref_hz);
-	fbdiv = DIV_ROUND_UP_ULL(dlane_bps * 2 * cfg->pll_opdiv *
-				 cfg->pll_ipdiv,
-				 pll_ref_hz);
-
-	/*
-	 * Iterate over all acceptable fbdiv and try to find an adjusted DSI
-	 * htotal length providing an exact match.
-	 *
-	 * Note that we could do something even trickier by relying on the fact
-	 * that a new line is not necessarily aligned on a lane boundary, so,
-	 * by making adj_dsi_htotal non aligned on a dsi_lanes we can improve a
-	 * bit the precision. With this, the step would be
-	 *
-	 *	pll_ref_hz / (2 * opdiv * ipdiv * nlanes)
-	 *
-	 * instead of
-	 *
-	 *	pll_ref_hz / (2 * opdiv * ipdiv)
-	 *
-	 * The drawback of this approach is that we would need to make sure the
-	 * number or lines is a multiple of the realignment periodicity which is
-	 * a function of the number of lanes and the original misalignment. For
-	 * example, for NLANES = 4 and HTOTAL % NLANES = 3, it takes 4 lines
-	 * to realign on a lane:
-	 * LINE 0: expected number of bytes, starts emitting first byte of
-	 *	   LINE 1 on LANE 3
-	 * LINE 1: expected number of bytes, starts emitting first 2 bytes of
-	 *	   LINE 2 on LANES 2 and 3
-	 * LINE 2: expected number of bytes, starts emitting first 3 bytes of
-	 *	   of LINE 3 on LANES 1, 2 and 3
-	 * LINE 3: one byte less, now things are realigned on LANE 0 for LINE 4
-	 *
-	 * I figured this extra complexity was not worth the benefit, but if
-	 * someone really has unfixable mismatch, that would be something to
-	 * investigate.
-	 */
-	for (; fbdiv <= fbdiv_max; fbdiv++) {
-		u32 rem;
-
-		adj_dsi_htotal = (u64)fbdiv * pll_ref_hz * dsi_nlanes *
-				 dpi_htotal;
-
-		/*
-		 * Do the division in 2 steps to avoid an overflow on the
-		 * divider.
-		 */
-		rem = do_div(adj_dsi_htotal, dpi_hz);
-		if (rem)
-			continue;
-
-		rem = do_div(adj_dsi_htotal,
-			     cfg->pll_opdiv * cfg->pll_ipdiv * 2 * 8);
-		if (rem)
-			continue;
-
-		cfg->pll_fbdiv = fbdiv;
-		*dsi_hfp_ext = adj_dsi_htotal - dsi_htotal;
-		break;
-	}
-
-	/* No match, let's just reject the display mode. */
-	if (!cfg->pll_fbdiv)
-		return -EINVAL;
-
-	dlane_bps = DIV_ROUND_DOWN_ULL((u64)dpi_hz * adj_dsi_htotal * 8,
-				       dsi_nlanes * dpi_htotal);
-	cfg->lane_bps = dlane_bps;
-
-	return 0;
-}
-
-static int cdns_dphy_setup_psm(struct cdns_dphy *dphy)
-{
-	unsigned long psm_clk_hz = clk_get_rate(dphy->psm_clk);
-	unsigned long psm_div;
-
-	if (!psm_clk_hz || psm_clk_hz > 100000000)
-		return -EINVAL;
-
-	psm_div = DIV_ROUND_CLOSEST(psm_clk_hz, 1000000);
-	if (dphy->ops->set_psm_div)
-		dphy->ops->set_psm_div(dphy, psm_div);
-
-	return 0;
-}
-
-static void cdns_dphy_set_clk_lane_cfg(struct cdns_dphy *dphy,
-				       enum cdns_dphy_clk_lane_cfg cfg)
-{
-	if (dphy->ops->set_clk_lane_cfg)
-		dphy->ops->set_clk_lane_cfg(dphy, cfg);
-}
-
-static void cdns_dphy_set_pll_cfg(struct cdns_dphy *dphy,
-				  const struct cdns_dphy_cfg *cfg)
-{
-	if (dphy->ops->set_pll_cfg)
-		dphy->ops->set_pll_cfg(dphy, cfg);
-}
-
-static unsigned long cdns_dphy_get_wakeup_time_ns(struct cdns_dphy *dphy)
-{
-	return dphy->ops->get_wakeup_time_ns(dphy);
-}
-
 static unsigned int dpi_to_dsi_timing(unsigned int dpi_timing,
 				      unsigned int dpi_bpp,
 				      unsigned int dsi_pkt_overhead)
@@ -780,17 +545,20 @@ static int cdns_dsi_mode2cfg(struct cdns_dsi *dsi,
 	return 0;
 }
 
-static int cdns_dphy_validate(struct cdns_dsi *dsi,
+static int cdns_dsi_adjust_phy_config(struct cdns_dsi *dsi,
 			      struct cdns_dsi_cfg *dsi_cfg,
-			      struct cdns_dphy_cfg *dphy_cfg,
+			      struct phy_configure_opts_mipi_dphy *phy_cfg,
 			      const struct drm_display_mode *mode,
 			      bool mode_valid_check)
 {
 	struct cdns_dsi_output *output = &dsi->output;
+	unsigned long long dlane_bps;
+	unsigned long adj_dsi_htotal;
 	unsigned long dsi_htotal;
-	unsigned int dsi_hfp_ext = 0;
-
-	int ret;
+	unsigned long dpi_htotal;
+	unsigned long dpi_hz;
+	unsigned int dsi_hfp_ext;
+	unsigned int lanes = output->dev->lanes;
 
 	dsi_htotal = dsi_cfg->hbp + DSI_HBP_FRAME_OVERHEAD;
 	if (output->dev->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
@@ -799,25 +567,27 @@ static int cdns_dphy_validate(struct cdns_dsi *dsi,
 	dsi_htotal += dsi_cfg->hact;
 	dsi_htotal += dsi_cfg->hfp + DSI_HFP_FRAME_OVERHEAD;
 
-	if (mode_valid_check)
-		ret = cdns_dsi_get_dphy_pll_cfg(dsi->dphy, dphy_cfg,
-						mode->htotal,
-						mode->clock * 1000,
-						mipi_dsi_pixel_format_to_bpp(output->dev->format),
-						dsi_htotal,
-						output->dev->lanes,
-						&dsi_hfp_ext);
-	else
-		ret = cdns_dsi_get_dphy_pll_cfg(dsi->dphy, dphy_cfg,
-						mode->crtc_htotal,
-						mipi_dsi_pixel_format_to_bpp(output->dev->format),
-						mode->crtc_clock * 1000,
-						dsi_htotal,
-						output->dev->lanes,
-						&dsi_hfp_ext);
-	if (ret)
-		return ret;
+	/*
+	 * Make sure DSI htotal is aligned on a lane boundary when calculating
+	 * the expected data rate. This is done by extending HFP in case of
+	 * misalignment.
+	 */
+	adj_dsi_htotal = dsi_htotal;
+	if (dsi_htotal % lanes)
+		adj_dsi_htotal += lanes - (dsi_htotal % lanes);
+
+	dpi_hz = (mode_valid_check ? mode->clock : mode->crtc_clock) * 1000;
+	dlane_bps = (unsigned long long)dpi_hz * adj_dsi_htotal;
+
+	/* data rate in bytes/sec is not an integer, refuse the mode. */
+	dpi_htotal = mode_valid_check ? mode->htotal : mode->crtc_htotal;
+	if (do_div(dlane_bps, lanes * dpi_htotal))
+		return -EINVAL;
 
+	/* data rate was in bytes/sec, convert to bits/sec. */
+	phy_cfg->hs_clk_rate = dlane_bps * 8;
+
+	dsi_hfp_ext = adj_dsi_htotal - dsi_htotal;
 	dsi_cfg->hfp += dsi_hfp_ext;
 	dsi_cfg->htotal = dsi_htotal + dsi_hfp_ext;
 
@@ -827,10 +597,10 @@ static int cdns_dphy_validate(struct cdns_dsi *dsi,
 static int cdns_dsi_check_conf(struct cdns_dsi *dsi,
 			       const struct drm_display_mode *mode,
 			       struct cdns_dsi_cfg *dsi_cfg,
-			       struct cdns_dphy_cfg *dphy_cfg,
 			       bool mode_valid_check)
 {
 	struct cdns_dsi_output *output = &dsi->output;
+	struct phy_configure_opts_mipi_dphy *phy_cfg = &output->phy_opts.mipi_dphy;
 	unsigned long dsi_hss_hsa_hse_hbp;
 	unsigned int nlanes = output->dev->lanes;
 	int ret;
@@ -839,7 +609,15 @@ static int cdns_dsi_check_conf(struct cdns_dsi *dsi,
 	if (ret)
 		return ret;
 
-	ret = cdns_dphy_validate(dsi, dsi_cfg, dphy_cfg, mode, mode_valid_check);
+	phy_mipi_dphy_get_default_config(mode->crtc_clock * 1000,
+					 mipi_dsi_pixel_format_to_bpp(output->dev->format),
+					 nlanes, phy_cfg);
+
+	ret = cdns_dsi_adjust_phy_config(dsi, dsi_cfg, phy_cfg, mode, mode_valid_check);
+	if (ret)
+		return ret;
+
+	ret = phy_validate(dsi->dphy, PHY_MODE_MIPI_DPHY, 0, &output->phy_opts);
 	if (ret)
 		return ret;
 
@@ -852,7 +630,7 @@ static int cdns_dsi_check_conf(struct cdns_dsi *dsi,
 	 * is empty before we start a receiving a new line on the DPI
 	 * interface.
 	 */
-	if ((u64)dphy_cfg->lane_bps * mode_to_dpi_hfp(mode) * nlanes <
+	if ((u64)phy_cfg->hs_clk_rate * mode_to_dpi_hfp(mode) * nlanes <
 	    (u64)dsi_hss_hsa_hse_hbp *
 	    (mode_valid_check ? mode->clock : mode->crtc_clock) * 1000)
 		return -EINVAL;
@@ -882,7 +660,6 @@ cdns_dsi_bridge_mode_valid(struct drm_bridge *bridge,
 	struct cdns_dsi_input *input = bridge_to_cdns_dsi_input(bridge);
 	struct cdns_dsi *dsi = input_to_dsi(input);
 	struct cdns_dsi_output *output = &dsi->output;
-	struct cdns_dphy_cfg dphy_cfg;
 	struct cdns_dsi_cfg dsi_cfg;
 	int bpp, ret;
 
@@ -902,7 +679,7 @@ cdns_dsi_bridge_mode_valid(struct drm_bridge *bridge,
 	if ((mode->hdisplay * bpp) % 32)
 		return MODE_H_ILLEGAL;
 
-	ret = cdns_dsi_check_conf(dsi, mode, &dsi_cfg, &dphy_cfg, true);
+	ret = cdns_dsi_check_conf(dsi, mode, &dsi_cfg, true);
 	if (ret)
 		return MODE_BAD;
 
@@ -925,9 +702,9 @@ static void cdns_dsi_bridge_disable(struct drm_bridge *bridge)
 	pm_runtime_put(dsi->base.dev);
 }
 
-static void cdns_dsi_hs_init(struct cdns_dsi *dsi,
-			     const struct cdns_dphy_cfg *dphy_cfg)
+static void cdns_dsi_hs_init(struct cdns_dsi *dsi)
 {
+	struct cdns_dsi_output *output = &dsi->output;
 	u32 status;
 
 	/*
@@ -938,30 +715,10 @@ static void cdns_dsi_hs_init(struct cdns_dsi *dsi,
 	       DPHY_CMN_PDN | DPHY_PLL_PDN,
 	       dsi->regs + MCTL_DPHY_CFG0);
 
-	/*
-	 * Configure the internal PSM clk divider so that the DPHY has a
-	 * 1MHz clk (or something close).
-	 */
-	WARN_ON_ONCE(cdns_dphy_setup_psm(dsi->dphy));
-
-	/*
-	 * Configure attach clk lanes to data lanes: the DPHY has 2 clk lanes
-	 * and 8 data lanes, each clk lane can be attache different set of
-	 * data lanes. The 2 groups are named 'left' and 'right', so here we
-	 * just say that we want the 'left' clk lane to drive the 'left' data
-	 * lanes.
-	 */
-	cdns_dphy_set_clk_lane_cfg(dsi->dphy, DPHY_CLK_CFG_LEFT_DRIVES_LEFT);
-
-	/*
-	 * Configure the DPHY PLL that will be used to generate the TX byte
-	 * clk.
-	 */
-	cdns_dphy_set_pll_cfg(dsi->dphy, dphy_cfg);
-
-	/* Start TX state machine. */
-	writel(DPHY_CMN_SSM_EN | DPHY_CMN_TX_MODE_EN,
-	       dsi->dphy->regs + DPHY_CMN_SSM);
+	phy_init(dsi->dphy);
+	phy_set_mode(dsi->dphy, PHY_MODE_MIPI_DPHY);
+	phy_configure(dsi->dphy, &output->phy_opts);
+	phy_power_on(dsi->dphy);
 
 	/* Activate the PLL and wait until it's locked. */
 	writel(PLL_LOCKED, dsi->regs + MCTL_MAIN_STS_CLR);
@@ -971,7 +728,7 @@ static void cdns_dsi_hs_init(struct cdns_dsi *dsi,
 					status & PLL_LOCKED, 100, 100));
 	/* De-assert data and clock reset lines. */
 	writel(DPHY_CMN_PSO | DPHY_ALL_D_PDN | DPHY_C_PDN | DPHY_CMN_PDN |
-	       DPHY_D_RSTB(dphy_cfg->nlanes) | DPHY_C_RSTB,
+	       DPHY_D_RSTB(output->dev->lanes) | DPHY_C_RSTB,
 	       dsi->regs + MCTL_DPHY_CFG0);
 }
 
@@ -1017,7 +774,7 @@ static void cdns_dsi_bridge_enable(struct drm_bridge *bridge)
 	struct cdns_dsi *dsi = input_to_dsi(input);
 	struct cdns_dsi_output *output = &dsi->output;
 	struct drm_display_mode *mode;
-	struct cdns_dphy_cfg dphy_cfg;
+	struct phy_configure_opts_mipi_dphy *phy_cfg = &output->phy_opts.mipi_dphy;
 	unsigned long tx_byte_period;
 	struct cdns_dsi_cfg dsi_cfg;
 	u32 tmp, reg_wakeup, div;
@@ -1030,9 +787,9 @@ static void cdns_dsi_bridge_enable(struct drm_bridge *bridge)
 	bpp = mipi_dsi_pixel_format_to_bpp(output->dev->format);
 	nlanes = output->dev->lanes;
 
-	WARN_ON_ONCE(cdns_dsi_check_conf(dsi, mode, &dsi_cfg, &dphy_cfg, false));
+	WARN_ON_ONCE(cdns_dsi_check_conf(dsi, mode, &dsi_cfg, false));
 
-	cdns_dsi_hs_init(dsi, &dphy_cfg);
+	cdns_dsi_hs_init(dsi);
 	cdns_dsi_init_link(dsi);
 
 	writel(HBP_LEN(dsi_cfg.hbp) | HSA_LEN(dsi_cfg.hsa),
@@ -1068,9 +825,8 @@ static void cdns_dsi_bridge_enable(struct drm_bridge *bridge)
 		tmp -= DIV_ROUND_UP(DSI_EOT_PKT_SIZE, nlanes);
 
 	tx_byte_period = DIV_ROUND_DOWN_ULL((u64)NSEC_PER_SEC * 8,
-					    dphy_cfg.lane_bps);
-	reg_wakeup = cdns_dphy_get_wakeup_time_ns(dsi->dphy) /
-		     tx_byte_period;
+					    phy_cfg->hs_clk_rate);
+	reg_wakeup = (phy_cfg->hs_prepare + phy_cfg->hs_zero) / tx_byte_period;
 	writel(REG_WAKEUP_TIME(reg_wakeup) | REG_LINE_DURATION(tmp),
 	       dsi->regs + VID_DPHY_TIME);
 
@@ -1384,8 +1140,6 @@ static int __maybe_unused cdns_dsi_resume(struct device *dev)
 	reset_control_deassert(dsi->dsi_p_rst);
 	clk_prepare_enable(dsi->dsi_p_clk);
 	clk_prepare_enable(dsi->dsi_sys_clk);
-	clk_prepare_enable(dsi->dphy->psm_clk);
-	clk_prepare_enable(dsi->dphy->pll_ref_clk);
 
 	return 0;
 }
@@ -1394,8 +1148,6 @@ static int __maybe_unused cdns_dsi_suspend(struct device *dev)
 {
 	struct cdns_dsi *dsi = dev_get_drvdata(dev);
 
-	clk_disable_unprepare(dsi->dphy->pll_ref_clk);
-	clk_disable_unprepare(dsi->dphy->psm_clk);
 	clk_disable_unprepare(dsi->dsi_sys_clk);
 	clk_disable_unprepare(dsi->dsi_p_clk);
 	reset_control_assert(dsi->dsi_p_rst);
@@ -1406,121 +1158,6 @@ static int __maybe_unused cdns_dsi_suspend(struct device *dev)
 static UNIVERSAL_DEV_PM_OPS(cdns_dsi_pm_ops, cdns_dsi_suspend, cdns_dsi_resume,
 			    NULL);
 
-static unsigned long cdns_dphy_ref_get_wakeup_time_ns(struct cdns_dphy *dphy)
-{
-	/* Default wakeup time is 800 ns (in a simulated environment). */
-	return 800;
-}
-
-static void cdns_dphy_ref_set_pll_cfg(struct cdns_dphy *dphy,
-				      const struct cdns_dphy_cfg *cfg)
-{
-	u32 fbdiv_low, fbdiv_high;
-
-	fbdiv_low = (cfg->pll_fbdiv / 4) - 2;
-	fbdiv_high = cfg->pll_fbdiv - fbdiv_low - 2;
-
-	writel(DPHY_CMN_IPDIV_FROM_REG | DPHY_CMN_OPDIV_FROM_REG |
-	       DPHY_CMN_IPDIV(cfg->pll_ipdiv) |
-	       DPHY_CMN_OPDIV(cfg->pll_opdiv),
-	       dphy->regs + DPHY_CMN_OPIPDIV);
-	writel(DPHY_CMN_FBDIV_FROM_REG |
-	       DPHY_CMN_FBDIV_VAL(fbdiv_low, fbdiv_high),
-	       dphy->regs + DPHY_CMN_FBDIV);
-	writel(DPHY_CMN_PWM_HIGH(6) | DPHY_CMN_PWM_LOW(0x101) |
-	       DPHY_CMN_PWM_DIV(0x8),
-	       dphy->regs + DPHY_CMN_PWM);
-}
-
-static void cdns_dphy_ref_set_psm_div(struct cdns_dphy *dphy, u8 div)
-{
-	writel(DPHY_PSM_CFG_FROM_REG | DPHY_PSM_CLK_DIV(div),
-	       dphy->regs + DPHY_PSM_CFG);
-}
-
-/*
- * This is the reference implementation of DPHY hooks. Specific integration of
- * this IP may have to re-implement some of them depending on how they decided
- * to wire things in the SoC.
- */
-static const struct cdns_dphy_ops ref_dphy_ops = {
-	.get_wakeup_time_ns = cdns_dphy_ref_get_wakeup_time_ns,
-	.set_pll_cfg = cdns_dphy_ref_set_pll_cfg,
-	.set_psm_div = cdns_dphy_ref_set_psm_div,
-};
-
-static const struct of_device_id cdns_dphy_of_match[] = {
-	{ .compatible = "cdns,dphy", .data = &ref_dphy_ops },
-	{ /* sentinel */ },
-};
-
-static struct cdns_dphy *cdns_dphy_probe(struct platform_device *pdev)
-{
-	const struct of_device_id *match;
-	struct cdns_dphy *dphy;
-	struct of_phandle_args args;
-	struct resource res;
-	int ret;
-
-	ret = of_parse_phandle_with_args(pdev->dev.of_node, "phys",
-					 "#phy-cells", 0, &args);
-	if (ret)
-		return ERR_PTR(-ENOENT);
-
-	match = of_match_node(cdns_dphy_of_match, args.np);
-	if (!match || !match->data)
-		return ERR_PTR(-EINVAL);
-
-	dphy = devm_kzalloc(&pdev->dev, sizeof(*dphy), GFP_KERNEL);
-	if (!dphy)
-		return ERR_PTR(-ENOMEM);
-
-	dphy->ops = match->data;
-
-	ret = of_address_to_resource(args.np, 0, &res);
-	if (ret)
-		return ERR_PTR(ret);
-
-	dphy->regs = devm_ioremap_resource(&pdev->dev, &res);
-	if (IS_ERR(dphy->regs))
-		return ERR_CAST(dphy->regs);
-
-	dphy->psm_clk = of_clk_get_by_name(args.np, "psm");
-	if (IS_ERR(dphy->psm_clk))
-		return ERR_CAST(dphy->psm_clk);
-
-	dphy->pll_ref_clk = of_clk_get_by_name(args.np, "pll_ref");
-	if (IS_ERR(dphy->pll_ref_clk)) {
-		ret = PTR_ERR(dphy->pll_ref_clk);
-		goto err_put_psm_clk;
-	}
-
-	if (dphy->ops->probe) {
-		ret = dphy->ops->probe(dphy);
-		if (ret)
-			goto err_put_pll_ref_clk;
-	}
-
-	return dphy;
-
-err_put_pll_ref_clk:
-	clk_put(dphy->pll_ref_clk);
-
-err_put_psm_clk:
-	clk_put(dphy->psm_clk);
-
-	return ERR_PTR(ret);
-}
-
-static void cdns_dphy_remove(struct cdns_dphy *dphy)
-{
-	if (dphy->ops->remove)
-		dphy->ops->remove(dphy);
-
-	clk_put(dphy->pll_ref_clk);
-	clk_put(dphy->psm_clk);
-}
-
 static int cdns_dsi_drm_probe(struct platform_device *pdev)
 {
 	struct cdns_dsi *dsi;
@@ -1559,13 +1196,13 @@ static int cdns_dsi_drm_probe(struct platform_device *pdev)
 	if (irq < 0)
 		return irq;
 
-	dsi->dphy = cdns_dphy_probe(pdev);
+	dsi->dphy = devm_phy_get(&pdev->dev, "dphy");
 	if (IS_ERR(dsi->dphy))
 		return PTR_ERR(dsi->dphy);
 
 	ret = clk_prepare_enable(dsi->dsi_p_clk);
 	if (ret)
-		goto err_remove_dphy;
+		return ret;
 
 	val = readl(dsi->regs + ID_REG);
 	if (REV_VENDOR_ID(val) != 0xcad) {
@@ -1623,9 +1260,6 @@ static int cdns_dsi_drm_probe(struct platform_device *pdev)
 err_disable_pclk:
 	clk_disable_unprepare(dsi->dsi_p_clk);
 
-err_remove_dphy:
-	cdns_dphy_remove(dsi->dphy);
-
 	return ret;
 }
 
@@ -1635,7 +1269,6 @@ static int cdns_dsi_drm_remove(struct platform_device *pdev)
 
 	mipi_dsi_host_unregister(&dsi->base);
 	pm_runtime_disable(&pdev->dev);
-	cdns_dphy_remove(dsi->dphy);
 
 	return 0;
 }
-- 
git-series 0.9.1
