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Message-ID: <20240715095736.618246-3-manikandan.m@microchip.com>
Date: Mon, 15 Jul 2024 15:27:34 +0530
From: Manikandan Muralidharan <manikandan.m@...rochip.com>
To: <andrzej.hajda@...el.com>, <neil.armstrong@...aro.org>,
<rfoss@...nel.org>, <Laurent.pinchart@...asonboard.com>, <jonas@...boo.se>,
<jernej.skrabec@...il.com>, <airlied@...il.com>, <daniel@...ll.ch>,
<maarten.lankhorst@...ux.intel.com>, <mripard@...nel.org>,
<tzimmermann@...e.de>, <robh@...nel.org>, <krzk+dt@...nel.org>,
<conor+dt@...nel.org>, <linux@...linux.org.uk>,
<nicolas.ferre@...rochip.com>, <alexandre.belloni@...tlin.com>,
<claudiu.beznea@...on.dev>, <arnd@...db.de>, <Jason@...c4.com>,
<rdunlap@...radead.org>, <akpm@...ux-foundation.org>,
<geert+renesas@...der.be>, <dri-devel@...ts.freedesktop.org>,
<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>
CC: <manikandan.m@...rochip.com>, <Hari.PrasathGE@...rochip.com>,
<Nicolas.Ferre@...rochip.com>
Subject: [PATCH v2 2/4] drm/bridge: add Microchip DSI controller support for sam9x7 SoC series
Add the Microchip's DSI controller wrapper driver that uses
the Synopsys DesignWare MIPI DSI host controller bridge.
Signed-off-by: Manikandan Muralidharan <manikandan.m@...rochip.com>
---
changes in v2:
- use static const with global variables
- replace dev_err with dev_err_probe
- move clk_prepare_enable to simplify the error path
- use FIELD_PREP calls
- remove unused macros and unused functions
- rename function name with mchp_ suffix
- add suspend and resume pm calls to handle pllref_clk
---
drivers/gpu/drm/bridge/Kconfig | 8 +
drivers/gpu/drm/bridge/Makefile | 1 +
drivers/gpu/drm/bridge/dw-mipi-dsi-mchp.c | 546 ++++++++++++++++++++++
3 files changed, 555 insertions(+)
create mode 100644 drivers/gpu/drm/bridge/dw-mipi-dsi-mchp.c
diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
index c621be1a99a8..459ad9768234 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -196,6 +196,14 @@ config DRM_MICROCHIP_LVDS_SERIALIZER
help
Support for Microchip's LVDS serializer.
+config DRM_MICROCHIP_DW_MIPI_DSI
+ tristate "Microchip specific extensions for Synopsys DW MIPI DSI"
+ depends on DRM_ATMEL_HLCDC
+ select DRM_DW_MIPI_DSI
+ help
+ This selects support for Microchip's SoC specific extensions
+ for the Synopsys DesignWare dsi driver.
+
config DRM_NWL_MIPI_DSI
tristate "Northwest Logic MIPI DSI Host controller"
depends on DRM
diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile
index 7df87b582dca..aff5052100b9 100644
--- a/drivers/gpu/drm/bridge/Makefile
+++ b/drivers/gpu/drm/bridge/Makefile
@@ -14,6 +14,7 @@ obj-$(CONFIG_DRM_LONTIUM_LT9611UXC) += lontium-lt9611uxc.o
obj-$(CONFIG_DRM_LVDS_CODEC) += lvds-codec.o
obj-$(CONFIG_DRM_MEGACHIPS_STDPXXXX_GE_B850V3_FW) += megachips-stdpxxxx-ge-b850v3-fw.o
obj-$(CONFIG_DRM_MICROCHIP_LVDS_SERIALIZER) += microchip-lvds.o
+obj-$(CONFIG_DRM_MICROCHIP_DW_MIPI_DSI) += dw-mipi-dsi-mchp.o
obj-$(CONFIG_DRM_NXP_PTN3460) += nxp-ptn3460.o
obj-$(CONFIG_DRM_PARADE_PS8622) += parade-ps8622.o
obj-$(CONFIG_DRM_PARADE_PS8640) += parade-ps8640.o
diff --git a/drivers/gpu/drm/bridge/dw-mipi-dsi-mchp.c b/drivers/gpu/drm/bridge/dw-mipi-dsi-mchp.c
new file mode 100644
index 000000000000..4f397296e5e0
--- /dev/null
+++ b/drivers/gpu/drm/bridge/dw-mipi-dsi-mchp.c
@@ -0,0 +1,546 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2024 Microchip Technology Inc. and its subsidiaries
+ *
+ * Author: Manikandan Muralidharan <manikandan.m@...rochip.com>
+ *
+ */
+
+#include <drm/bridge/dw_mipi_dsi.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_print.h>
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/mfd/syscon.h>
+#include <linux/mod_devicetable.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#define DSI_PLL_REF_CLK 24000000
+
+#define DSI_PWR_UP 0x04
+#define HOST_RESET BIT(0)
+#define HOST_PWRUP 0
+
+#define DSI_PHY_RSTZ 0xa0
+#define PHY_SHUTDOWNZ 0
+
+#define DSI_PHY_TST_CTRL0 0xb4
+#define PHY_TESTCLK BIT(1)
+#define PHY_UNTESTCLK 0
+#define PHY_UNTESTCLR 0
+
+#define DSI_PHY_TST_CTRL1 0xb8
+#define PHY_TESTEN BIT(16)
+#define PHY_UNTESTEN 0
+#define PHY_TESTDOUT_MASK GENMASK(15, 8)
+#define PHY_TESTDIN_MASK GENMASK(7, 0)
+
+#define BYPASS_VCO_RANGE BIT(7)
+#define VCO_RANGE_CON_SEL_MASK GENMASK(5, 3)
+#define VCO_IN_CAP_CON_LOW BIT(1)
+
+#define CP_CURRENT_0 0x2
+#define CP_CURRENT_1 0x4
+#define CP_CURRENT_2 0x5
+#define CP_CURRENT_3 0x6
+#define CP_CURRENT_4 0x7
+#define CP_CURRENT_5 0x8
+#define CP_CURRENT_6 0xc
+#define CP_CURRENT_SEL_MASK GENMASK(3, 0)
+#define CP_PROGRAM_EN BIT(7)
+
+#define LPF_RESISTORS_15_6KOHM 0x1
+#define LPF_RESISTORS_14_4KOHM 0x4
+#define LPF_RESISTORS_12_8KOHM 0x8
+#define LPF_RESISTORS_11_4KOHM 0x10
+#define LPF_PROGRAM_EN BIT(6)
+#define LPF_RESISTORS_SEL_MASK GENMASK(5, 0)
+
+#define INPUT_DIVIDER(val) (((val) - 1) & 0x7f)
+#define LOW_PROGRAM_EN 0
+#define HIGH_PROGRAM_EN BIT(7)
+#define LOOP_DIV_LOW_SEL(val) (((val) - 1) & 0x1f)
+#define LOOP_DIV_HIGH_SEL(val) ((((val) - 1) >> 5) & 0xf)
+#define PLL_LOOP_DIV_EN BIT(5)
+#define PLL_INPUT_DIV_EN BIT(4)
+
+#define PLL_BIAS_CUR_SEL_CAP_VCO_CONTROL 0x10
+#define PLL_CP_CONTROL_PLL_LOCK_BYPASS 0x11
+#define PLL_LPF_AND_CP_CONTROL 0x12
+#define PLL_INPUT_DIVIDER_RATIO 0x17
+#define PLL_LOOP_DIVIDER_RATIO 0x18
+#define PLL_INPUT_AND_LOOP_DIVIDER_RATIOS_CONTROL 0x19
+
+#define SFR_ISS_CFG 0x240
+#define ISS_CFG_DSI_MODE 1
+
+struct dw_mipi_dsi_mchp_chip_data {
+ const struct dw_mipi_dsi_phy_ops *phy_ops;
+ unsigned int max_data_lanes;
+};
+
+struct dw_mipi_dsi_mchp {
+ struct device *dev;
+ void __iomem *base;
+ struct dw_mipi_dsi *dsi;
+ struct clk *pllref_clk;
+ struct dw_mipi_dsi_plat_data pdata;
+
+ /* For PLL config */
+ unsigned int lane_mbps;
+ u16 input_div;
+ u16 feedback_div;
+ u32 format;
+};
+
+struct dphy_pll_parameter_map {
+ unsigned int max_mbps;
+ u8 hsfreqrange;
+ u8 icpctrl;
+ u8 lpfctrl;
+};
+
+static const struct dphy_pll_parameter_map dppa_map[] = {
+ { 89, 0x00, CP_CURRENT_1, LPF_RESISTORS_11_4KOHM },
+ { 99, 0x20, CP_CURRENT_1, LPF_RESISTORS_11_4KOHM },
+ { 109, 0x40, CP_CURRENT_1, LPF_RESISTORS_11_4KOHM },
+ { 129, 0x02, CP_CURRENT_5, LPF_RESISTORS_12_8KOHM },
+ { 139, 0x22, CP_CURRENT_5, LPF_RESISTORS_12_8KOHM },
+ { 149, 0x42, CP_CURRENT_5, LPF_RESISTORS_12_8KOHM },
+ { 169, 0x04, CP_CURRENT_6, LPF_RESISTORS_12_8KOHM },
+ { 179, 0x24, CP_CURRENT_6, LPF_RESISTORS_12_8KOHM },
+ { 199, 0x44, CP_CURRENT_6, LPF_RESISTORS_12_8KOHM },
+ { 219, 0x06, CP_CURRENT_6, LPF_RESISTORS_12_8KOHM },
+ { 239, 0x26, CP_CURRENT_6, LPF_RESISTORS_12_8KOHM },
+ { 249, 0x46, CP_CURRENT_6, LPF_RESISTORS_12_8KOHM },
+ { 269, 0x08, CP_CURRENT_0, LPF_RESISTORS_12_8KOHM },
+ { 299, 0x28, CP_CURRENT_0, LPF_RESISTORS_12_8KOHM },
+ { 329, 0x0a, CP_CURRENT_2, LPF_RESISTORS_12_8KOHM },
+ { 359, 0x2a, CP_CURRENT_2, LPF_RESISTORS_12_8KOHM },
+ { 399, 0x4a, CP_CURRENT_2, LPF_RESISTORS_12_8KOHM },
+ { 449, 0x0C, CP_CURRENT_2, LPF_RESISTORS_15_6KOHM },
+ { 499, 0x2c, CP_CURRENT_2, LPF_RESISTORS_15_6KOHM },
+ { 549, 0x0e, CP_CURRENT_3, LPF_RESISTORS_11_4KOHM },
+ { 599, 0x2e, CP_CURRENT_3, LPF_RESISTORS_11_4KOHM },
+ { 649, 0x10, CP_CURRENT_3, LPF_RESISTORS_14_4KOHM },
+ { 699, 0x30, CP_CURRENT_3, LPF_RESISTORS_14_4KOHM },
+ { 749, 0x12, CP_CURRENT_3, LPF_RESISTORS_14_4KOHM },
+ { 799, 0x32, CP_CURRENT_3, LPF_RESISTORS_14_4KOHM },
+ { 849, 0x52, CP_CURRENT_3, LPF_RESISTORS_14_4KOHM },
+ { 899, 0x72, CP_CURRENT_3, LPF_RESISTORS_14_4KOHM },
+ { 949, 0x14, CP_CURRENT_4, LPF_RESISTORS_11_4KOHM },
+ {1000, 0x34, CP_CURRENT_4, LPF_RESISTORS_11_4KOHM }
+};
+
+struct hstt {
+ unsigned int maxfreq;
+ struct dw_mipi_dsi_dphy_timing timing;
+};
+
+#define HSTT(_maxfreq, _c_lp2hs, _c_hs2lp, _d_lp2hs, _d_hs2lp) \
+{ \
+ .maxfreq = _maxfreq, \
+ .timing = { \
+ .clk_lp2hs = _c_lp2hs, \
+ .clk_hs2lp = _c_hs2lp, \
+ .data_lp2hs = _d_lp2hs, \
+ .data_hs2lp = _d_hs2lp, \
+ } \
+}
+
+static const struct hstt hstt_table[] = {
+ HSTT(90, 32, 20, 26, 13),
+ HSTT(100, 35, 23, 28, 14),
+ HSTT(110, 32, 22, 26, 13),
+ HSTT(130, 31, 20, 27, 13),
+ HSTT(140, 33, 22, 26, 14),
+ HSTT(150, 33, 21, 26, 14),
+ HSTT(170, 32, 20, 27, 13),
+ HSTT(180, 36, 23, 30, 15),
+ HSTT(200, 40, 22, 33, 15),
+ HSTT(220, 40, 22, 33, 15),
+ HSTT(240, 44, 24, 36, 16),
+ HSTT(250, 48, 24, 38, 17),
+ HSTT(270, 48, 24, 38, 17),
+ HSTT(300, 50, 27, 41, 18),
+ HSTT(330, 56, 28, 45, 18),
+ HSTT(360, 59, 28, 48, 19),
+ HSTT(400, 61, 30, 50, 20),
+ HSTT(450, 67, 31, 55, 21),
+ HSTT(500, 73, 31, 59, 22),
+ HSTT(550, 79, 36, 63, 24),
+ HSTT(600, 83, 37, 68, 25),
+ HSTT(650, 90, 38, 73, 27),
+ HSTT(700, 95, 40, 77, 28),
+ HSTT(750, 102, 40, 84, 28),
+ HSTT(800, 106, 42, 87, 30),
+ HSTT(850, 113, 44, 93, 31),
+ HSTT(900, 118, 47, 98, 32),
+ HSTT(950, 124, 47, 102, 34),
+ HSTT(1000, 130, 49, 107, 35),
+};
+
+static int mchp_max_mbps_to_parameter(unsigned int max_mbps)
+{
+ for (int index = 0; index < ARRAY_SIZE(dppa_map); index++)
+ if (dppa_map[index].max_mbps >= max_mbps)
+ return index;
+
+ return -EINVAL;
+}
+
+static inline void mchp_phy_write(struct dw_mipi_dsi_mchp *dsi, u32 reg, u32 val)
+{
+ writel(val, dsi->base + reg);
+}
+
+static void dw_mipi_dsi_mchp_phy_write(struct dw_mipi_dsi_mchp *dsi,
+ u8 test_code,
+ u8 test_data)
+{
+ /* General DPHY control operation */
+
+ mchp_phy_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLK | PHY_UNTESTCLR);
+ mchp_phy_write(dsi, DSI_PHY_TST_CTRL1, PHY_TESTEN |
+ FIELD_PREP(PHY_TESTDOUT_MASK, 1) |
+ FIELD_PREP(PHY_TESTDIN_MASK, test_code));
+ mchp_phy_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLK | PHY_UNTESTCLR);
+ mchp_phy_write(dsi, DSI_PHY_TST_CTRL1, PHY_UNTESTEN |
+ FIELD_PREP(PHY_TESTDOUT_MASK, 0) |
+ FIELD_PREP(PHY_TESTDIN_MASK, test_data));
+ mchp_phy_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLK | PHY_UNTESTCLR);
+ mchp_phy_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLK | PHY_UNTESTCLR);
+}
+
+static int dw_mipi_dsi_mchp_init(void *priv_data)
+{
+ struct dw_mipi_dsi_mchp *dsi = priv_data;
+ int index, vco, ret = 0;
+
+ /*
+ * Get vco from frequency(lane_mbps)
+ * vco frequency table
+ * 000 - between 80 and 200 MHz
+ * 001 - between 200 and 300 MHz
+ * 010 - between 300 and 500 MHz
+ * 011 - between 500 and 700 MHz
+ * 100 - between 700 and 900 MHz
+ * 101 - between 900 and 1000 MHz
+ */
+ vco = (dsi->lane_mbps < 200) ? 0 : (dsi->lane_mbps + 100) / 200;
+
+ index = mchp_max_mbps_to_parameter(dsi->lane_mbps);
+ if (index < 0) {
+ dev_err(dsi->dev,
+ "failed to get parameter for %dmbps clock\n",
+ dsi->lane_mbps);
+ return index;
+ }
+
+ /* D-PHY in Shutdown mode */
+ mchp_phy_write(dsi, DSI_PHY_RSTZ, PHY_SHUTDOWNZ);
+
+ dw_mipi_dsi_mchp_phy_write(dsi, PLL_BIAS_CUR_SEL_CAP_VCO_CONTROL,
+ BYPASS_VCO_RANGE |
+ FIELD_PREP(VCO_RANGE_CON_SEL_MASK, vco) |
+ VCO_IN_CAP_CON_LOW);
+
+ dw_mipi_dsi_mchp_phy_write(dsi, PLL_CP_CONTROL_PLL_LOCK_BYPASS,
+ FIELD_PREP(CP_CURRENT_SEL_MASK, dppa_map[index].icpctrl));
+
+ dw_mipi_dsi_mchp_phy_write(dsi, PLL_LPF_AND_CP_CONTROL,
+ CP_PROGRAM_EN | LPF_PROGRAM_EN |
+ FIELD_PREP(LPF_RESISTORS_SEL_MASK, dppa_map[index].lpfctrl));
+
+ dw_mipi_dsi_mchp_phy_write(dsi, PLL_INPUT_AND_LOOP_DIVIDER_RATIOS_CONTROL,
+ PLL_LOOP_DIV_EN | PLL_INPUT_DIV_EN);
+
+ dw_mipi_dsi_mchp_phy_write(dsi, PLL_INPUT_DIVIDER_RATIO,
+ INPUT_DIVIDER(dsi->input_div));
+
+ dw_mipi_dsi_mchp_phy_write(dsi, PLL_LOOP_DIVIDER_RATIO,
+ LOOP_DIV_LOW_SEL(dsi->feedback_div) |
+ LOW_PROGRAM_EN);
+
+ dw_mipi_dsi_mchp_phy_write(dsi, PLL_LOOP_DIVIDER_RATIO,
+ LOOP_DIV_HIGH_SEL(dsi->feedback_div) |
+ HIGH_PROGRAM_EN);
+
+ return ret;
+}
+
+static int dw_mipi_dsi_mchp_get_lane_mbps(void *priv_data,
+ const struct drm_display_mode *mode,
+ unsigned long mode_flags, u32 lanes,
+ u32 format, unsigned int *lane_mbps)
+{
+ struct dw_mipi_dsi_mchp *dsi = priv_data;
+ unsigned long best_freq, fvco_min, fvco_max, fin, fout;
+ unsigned long min_delta = ULONG_MAX, delta;
+ unsigned int mpclk, target_mbps, desired_mbps;
+ unsigned int max_mbps = dppa_map[ARRAY_SIZE(dppa_map) - 1].max_mbps;
+ unsigned int bpp, min_prediv, max_prediv;
+ unsigned int _fbdiv, best_fbdiv, _prediv, best_prediv;
+ u64 freq_factor;
+
+ dsi->format = format;
+ bpp = mipi_dsi_pixel_format_to_bpp(dsi->format);
+ if (bpp < 0) {
+ dev_err(dsi->dev,
+ "failed to get bpp for pixel format %d\n",
+ dsi->format);
+ return bpp;
+ }
+
+ mpclk = DIV_ROUND_UP(mode->clock, MSEC_PER_SEC);
+ if (mpclk) {
+ /* take 1/0.8, since mbps must be bigger than bandwidth of RGB */
+ desired_mbps = mpclk * (bpp / lanes) * 10 / 8;
+ if (desired_mbps < max_mbps) {
+ target_mbps = desired_mbps;
+ } else {
+ dev_err(dsi->dev,
+ "DPHY clock frequency is out of range\n");
+ return -ERANGE;
+ }
+ }
+
+ fin = clk_get_rate(dsi->pllref_clk);
+ fout = target_mbps * USEC_PER_SEC;
+
+ /* constraint: 5Mhz <= Fref / N <= 40MHz */
+ min_prediv = DIV_ROUND_UP(fin, 40 * USEC_PER_SEC);
+ max_prediv = fin / (5 * USEC_PER_SEC);
+
+ /* constraint: 80MHz <= Fvco <= 1000Mhz */
+ fvco_min = 80 * USEC_PER_SEC;
+ fvco_max = 1000 * USEC_PER_SEC;
+
+ for (best_freq = 0, _prediv = min_prediv; _prediv <= max_prediv; _prediv++) {
+ /* Fvco = Fref * M / N */
+ freq_factor = fout * _prediv;
+ do_div(freq_factor, fin);
+ _fbdiv = freq_factor;
+ /*
+ * Due to the use of a "by 2 pre-scaler," the range of the
+ * feedback multiplication value M is limited to even division
+ * numbers, and m must be greater than 6, not bigger than 512.
+ */
+ if (_fbdiv < 6 || _fbdiv > 512)
+ continue;
+
+ _fbdiv += _fbdiv % 2;
+
+ freq_factor = _fbdiv * fin;
+ do_div(freq_factor, _prediv);
+ if (freq_factor < fvco_min || freq_factor > fvco_max)
+ continue;
+
+ delta = abs(fout - freq_factor);
+ if (delta < min_delta) {
+ best_prediv = _prediv;
+ best_fbdiv = _fbdiv;
+ min_delta = delta;
+ best_freq = freq_factor;
+ }
+ }
+
+ if (best_freq) {
+ dsi->lane_mbps = DIV_ROUND_UP(best_freq, USEC_PER_SEC);
+ *lane_mbps = dsi->lane_mbps;
+ dsi->input_div = best_prediv;
+ dsi->feedback_div = best_fbdiv;
+ } else {
+ dev_err(dsi->dev, "Can not find best_freq for DPHY\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int dw_mipi_dsi_mchp_get_timing(void *priv_data, unsigned int lane_mbps,
+ struct dw_mipi_dsi_dphy_timing *timing)
+{
+ int index = 0;
+
+ for (; index < ARRAY_SIZE(hstt_table); index++)
+ if (lane_mbps < hstt_table[index].maxfreq)
+ break;
+
+ if (index == ARRAY_SIZE(hstt_table))
+ index--;
+
+ *timing = hstt_table[index].timing;
+
+ return 0;
+}
+
+static void dw_mipi_dsi_mchp_power_on(void *priv_data)
+{
+ struct dw_mipi_dsi_mchp *dsi = priv_data;
+
+ /* Enable the DSI wrapper */
+ mchp_phy_write(dsi, DSI_PWR_UP, HOST_PWRUP);
+}
+
+static void dw_mipi_dsi_mchp_power_off(void *priv_data)
+{
+ struct dw_mipi_dsi_mchp *dsi = priv_data;
+
+ /* Disable the DSI wrapper */
+ mchp_phy_write(dsi, DSI_PWR_UP, HOST_RESET);
+}
+
+static int dw_mipi_dsi_mchp_probe(struct platform_device *pdev)
+{
+ struct dw_mipi_dsi_mchp *dsi;
+ struct regmap *sfr;
+ const struct dw_mipi_dsi_mchp_chip_data *cdata;
+ int ret;
+
+ dsi = devm_kzalloc(&pdev->dev, sizeof(*dsi), GFP_KERNEL);
+ if (!dsi)
+ return -ENOMEM;
+
+ dsi->dev = &pdev->dev;
+ cdata = of_device_get_match_data(dsi->dev);
+
+ dsi->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(dsi->base)) {
+ ret = PTR_ERR(dsi->base);
+ dev_err_probe(dsi->dev, ret, "Unable to get DSI Base address\n");
+ return ret;
+ }
+
+ dsi->pllref_clk = devm_clk_get(&pdev->dev, "refclk");
+ if (IS_ERR(dsi->pllref_clk)) {
+ ret = PTR_ERR(dsi->pllref_clk);
+ dev_err_probe(dsi->dev, ret, "Unable to get DSI PHY PLL reference clock\n");
+ return ret;
+ }
+
+ sfr = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, "microchip,sfr");
+ if (IS_ERR(sfr)) {
+ ret = PTR_ERR(sfr);
+ dev_err_probe(dsi->dev, ret, "Failed to get handle on Special Function Register\n");
+ return ret;
+ }
+ /* Select DSI in SFR's ISS Configuration Register */
+ ret = regmap_write(sfr, SFR_ISS_CFG, ISS_CFG_DSI_MODE);
+ if (ret) {
+ dev_err_probe(dsi->dev, ret, "Failed to enable DSI in SFR_ISS_CFG Register\n");
+ return ret;
+ }
+
+ clk_set_rate(dsi->pllref_clk, DSI_PLL_REF_CLK);
+ if (clk_get_rate(dsi->pllref_clk) != DSI_PLL_REF_CLK) {
+ ret = -EINVAL;
+ dev_err_probe(dsi->dev, ret, "Failed to set DSI PHY PLL reference clock\n");
+ return ret;
+ }
+
+ ret = clk_prepare_enable(dsi->pllref_clk);
+ if (ret) {
+ dev_err_probe(dsi->dev, ret, "Failed to enable DSI PHY PLL reference clock\n");
+ return ret;
+ }
+
+ dsi->pdata.base = dsi->base;
+ dsi->pdata.max_data_lanes = cdata->max_data_lanes;
+ dsi->pdata.phy_ops = cdata->phy_ops;
+ dsi->pdata.priv_data = dsi;
+ platform_set_drvdata(pdev, dsi);
+
+ /* call synopsis probe */
+ dsi->dsi = dw_mipi_dsi_probe(pdev, &dsi->pdata);
+ if (IS_ERR(dsi->dsi)) {
+ ret = PTR_ERR(dsi->dsi);
+ dev_err_probe(dsi->dev, ret, "Failed to initialize mipi dsi host\n");
+ clk_disable_unprepare(dsi->pllref_clk);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int dw_mipi_dsi_mchp_remove(struct platform_device *pdev)
+{
+ struct dw_mipi_dsi_mchp *dsi = platform_get_drvdata(pdev);
+
+ dw_mipi_dsi_remove(dsi->dsi);
+ clk_disable_unprepare(dsi->pllref_clk);
+
+ return 0;
+}
+
+static int dw_mipi_dsi_mchp_suspend(struct device *dev)
+{
+ struct dw_mipi_dsi_mchp *dsi = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(dsi->pllref_clk);
+
+ return 0;
+}
+
+static int dw_mipi_dsi_mchp_resume(struct device *dev)
+{
+ struct dw_mipi_dsi_mchp *dsi = dev_get_drvdata(dev);
+ int ret;
+
+ ret = clk_prepare_enable(dsi->pllref_clk);
+ if (ret) {
+ dev_err(dsi->dev, "Failed to enable pllref_clk: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct dev_pm_ops dw_mipi_dsi_mchp_pm_ops = {
+ SYSTEM_SLEEP_PM_OPS(dw_mipi_dsi_mchp_suspend,
+ dw_mipi_dsi_mchp_resume)
+ RUNTIME_PM_OPS(dw_mipi_dsi_mchp_suspend,
+ dw_mipi_dsi_mchp_resume, NULL)
+};
+
+static const struct dw_mipi_dsi_phy_ops dw_mipi_dsi_mchp_phy_ops = {
+ .init = dw_mipi_dsi_mchp_init,
+ .power_on = dw_mipi_dsi_mchp_power_on,
+ .power_off = dw_mipi_dsi_mchp_power_off,
+ .get_lane_mbps = dw_mipi_dsi_mchp_get_lane_mbps,
+ .get_timing = dw_mipi_dsi_mchp_get_timing,
+};
+
+static const struct dw_mipi_dsi_mchp_chip_data sam9x75_chip_data = {
+ .max_data_lanes = 4,
+ .phy_ops = &dw_mipi_dsi_mchp_phy_ops,
+};
+
+static const struct of_device_id dw_mipi_dsi_mchp_dt_ids[] = {
+ {
+ .compatible = "microchip,sam9x75-mipi-dsi",
+ .data = &sam9x75_chip_data,
+ },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, dw_mipi_dsi_mchp_dt_ids);
+
+struct platform_driver dw_mipi_dsi_mchp_driver = {
+ .probe = dw_mipi_dsi_mchp_probe,
+ .remove = dw_mipi_dsi_mchp_remove,
+ .driver = {
+ .of_match_table = dw_mipi_dsi_mchp_dt_ids,
+ .name = "dw-mipi-dsi-mchp",
+ .pm = &dw_mipi_dsi_mchp_pm_ops,
+ },
+};
+module_platform_driver(dw_mipi_dsi_mchp_driver);
+
+MODULE_AUTHOR("Manikandan Muralidharan <manikandan.m@...rochip.com>");
+MODULE_DESCRIPTION("Microchip DW MIPI DSI controller wrapper driver");
+MODULE_LICENSE("GPL");
--
2.25.1
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