// SPDX-License-Identifier: GPL-2.0-only /* * Samsung MIPI DSIM bridge driver. * * Copyright (C) 2021 Amarula Solutions(India) * Copyright (c) 2014 Samsung Electronics Co., Ltd * Author: Jagan Teki <[email protected]> * * Based on exynos_drm_dsi from * Tomasz Figa <[email protected]> */ #include <asm/unaligned.h> #include <linux/clk.h> #include <linux/delay.h> #include <linux/irq.h> #include <linux/media-bus-format.h> #include <linux/of.h> #include <linux/phy/phy.h> #include <linux/platform_device.h> #include <video/mipi_display.h> #include <drm/bridge/samsung-dsim.h> #include <drm/drm_panel.h> #include <drm/drm_print.h> /* returns true iff both arguments logically differs */ #define NEQV(a, b) … /* DSIM_STATUS */ #define DSIM_STOP_STATE_DAT(x) … #define DSIM_STOP_STATE_CLK … #define DSIM_TX_READY_HS_CLK … #define DSIM_PLL_STABLE … /* DSIM_SWRST */ #define DSIM_FUNCRST … #define DSIM_SWRST … /* DSIM_TIMEOUT */ #define DSIM_LPDR_TIMEOUT(x) … #define DSIM_BTA_TIMEOUT(x) … /* DSIM_CLKCTRL */ #define DSIM_ESC_PRESCALER(x) … #define DSIM_ESC_PRESCALER_MASK … #define DSIM_LANE_ESC_CLK_EN_CLK … #define DSIM_LANE_ESC_CLK_EN_DATA(x) … #define DSIM_LANE_ESC_CLK_EN_DATA_MASK … #define DSIM_BYTE_CLKEN … #define DSIM_BYTE_CLK_SRC(x) … #define DSIM_BYTE_CLK_SRC_MASK … #define DSIM_PLL_BYPASS … #define DSIM_ESC_CLKEN … #define DSIM_TX_REQUEST_HSCLK … /* DSIM_CONFIG */ #define DSIM_LANE_EN_CLK … #define DSIM_LANE_EN(x) … #define DSIM_NUM_OF_DATA_LANE(x) … #define DSIM_SUB_PIX_FORMAT(x) … #define DSIM_MAIN_PIX_FORMAT_MASK … #define DSIM_MAIN_PIX_FORMAT_RGB888 … #define DSIM_MAIN_PIX_FORMAT_RGB666 … #define DSIM_MAIN_PIX_FORMAT_RGB666_P … #define DSIM_MAIN_PIX_FORMAT_RGB565 … #define DSIM_SUB_VC … #define DSIM_MAIN_VC … #define DSIM_HSA_DISABLE_MODE … #define DSIM_HBP_DISABLE_MODE … #define DSIM_HFP_DISABLE_MODE … /* * The i.MX 8M Mini Applications Processor Reference Manual, * Rev. 3, 11/2020 Page 4091 * The i.MX 8M Nano Applications Processor Reference Manual, * Rev. 2, 07/2022 Page 3058 * The i.MX 8M Plus Applications Processor Reference Manual, * Rev. 1, 06/2021 Page 5436 * all claims this bit is 'HseDisableMode' with the definition * 0 = Disables transfer * 1 = Enables transfer * * This clearly states that HSE is not a disabled bit. * * The naming convention follows as per the manual and the * driver logic is based on the MIPI_DSI_MODE_VIDEO_HSE flag. */ #define DSIM_HSE_DISABLE_MODE … #define DSIM_AUTO_MODE … #define DSIM_VIDEO_MODE … #define DSIM_BURST_MODE … #define DSIM_SYNC_INFORM … #define DSIM_EOT_DISABLE … #define DSIM_MFLUSH_VS … /* This flag is valid only for exynos3250/3472/5260/5430 */ #define DSIM_CLKLANE_STOP … #define DSIM_NON_CONTINUOUS_CLKLANE … /* DSIM_ESCMODE */ #define DSIM_TX_TRIGGER_RST … #define DSIM_TX_LPDT_LP … #define DSIM_CMD_LPDT_LP … #define DSIM_FORCE_BTA … #define DSIM_FORCE_STOP_STATE … #define DSIM_STOP_STATE_CNT(x) … #define DSIM_STOP_STATE_CNT_MASK … /* DSIM_MDRESOL */ #define DSIM_MAIN_STAND_BY … #define DSIM_MAIN_VRESOL(x, num_bits) … #define DSIM_MAIN_HRESOL(x, num_bits) … /* DSIM_MVPORCH */ #define DSIM_CMD_ALLOW(x) … #define DSIM_STABLE_VFP(x) … #define DSIM_MAIN_VBP(x) … #define DSIM_CMD_ALLOW_MASK … #define DSIM_STABLE_VFP_MASK … #define DSIM_MAIN_VBP_MASK … /* DSIM_MHPORCH */ #define DSIM_MAIN_HFP(x) … #define DSIM_MAIN_HBP(x) … #define DSIM_MAIN_HFP_MASK … #define DSIM_MAIN_HBP_MASK … /* DSIM_MSYNC */ #define DSIM_MAIN_VSA(x) … #define DSIM_MAIN_HSA(x) … #define DSIM_MAIN_VSA_MASK … #define DSIM_MAIN_HSA_MASK … /* DSIM_SDRESOL */ #define DSIM_SUB_STANDY(x) … #define DSIM_SUB_VRESOL(x) … #define DSIM_SUB_HRESOL(x) … #define DSIM_SUB_STANDY_MASK … #define DSIM_SUB_VRESOL_MASK … #define DSIM_SUB_HRESOL_MASK … /* DSIM_INTSRC */ #define DSIM_INT_PLL_STABLE … #define DSIM_INT_SW_RST_RELEASE … #define DSIM_INT_SFR_FIFO_EMPTY … #define DSIM_INT_SFR_HDR_FIFO_EMPTY … #define DSIM_INT_BTA … #define DSIM_INT_FRAME_DONE … #define DSIM_INT_RX_TIMEOUT … #define DSIM_INT_BTA_TIMEOUT … #define DSIM_INT_RX_DONE … #define DSIM_INT_RX_TE … #define DSIM_INT_RX_ACK … #define DSIM_INT_RX_ECC_ERR … #define DSIM_INT_RX_CRC_ERR … /* DSIM_FIFOCTRL */ #define DSIM_RX_DATA_FULL … #define DSIM_RX_DATA_EMPTY … #define DSIM_SFR_HEADER_FULL … #define DSIM_SFR_HEADER_EMPTY … #define DSIM_SFR_PAYLOAD_FULL … #define DSIM_SFR_PAYLOAD_EMPTY … #define DSIM_I80_HEADER_FULL … #define DSIM_I80_HEADER_EMPTY … #define DSIM_I80_PAYLOAD_FULL … #define DSIM_I80_PAYLOAD_EMPTY … #define DSIM_SD_HEADER_FULL … #define DSIM_SD_HEADER_EMPTY … #define DSIM_SD_PAYLOAD_FULL … #define DSIM_SD_PAYLOAD_EMPTY … #define DSIM_MD_HEADER_FULL … #define DSIM_MD_HEADER_EMPTY … #define DSIM_MD_PAYLOAD_FULL … #define DSIM_MD_PAYLOAD_EMPTY … #define DSIM_RX_FIFO … #define DSIM_SFR_FIFO … #define DSIM_I80_FIFO … #define DSIM_SD_FIFO … #define DSIM_MD_FIFO … /* DSIM_PHYACCHR */ #define DSIM_AFC_EN … #define DSIM_AFC_CTL(x) … /* DSIM_PLLCTRL */ #define DSIM_PLL_DPDNSWAP_CLK … #define DSIM_PLL_DPDNSWAP_DAT … #define DSIM_FREQ_BAND(x) … #define DSIM_PLL_EN … #define DSIM_PLL_P(x, offset) … #define DSIM_PLL_M(x) … #define DSIM_PLL_S(x) … /* DSIM_PHYCTRL */ #define DSIM_PHYCTRL_ULPS_EXIT(x) … #define DSIM_PHYCTRL_B_DPHYCTL_VREG_LP … #define DSIM_PHYCTRL_B_DPHYCTL_SLEW_UP … /* DSIM_PHYTIMING */ #define DSIM_PHYTIMING_LPX(x) … #define DSIM_PHYTIMING_HS_EXIT(x) … /* DSIM_PHYTIMING1 */ #define DSIM_PHYTIMING1_CLK_PREPARE(x) … #define DSIM_PHYTIMING1_CLK_ZERO(x) … #define DSIM_PHYTIMING1_CLK_POST(x) … #define DSIM_PHYTIMING1_CLK_TRAIL(x) … /* DSIM_PHYTIMING2 */ #define DSIM_PHYTIMING2_HS_PREPARE(x) … #define DSIM_PHYTIMING2_HS_ZERO(x) … #define DSIM_PHYTIMING2_HS_TRAIL(x) … #define DSI_MAX_BUS_WIDTH … #define DSI_NUM_VIRTUAL_CHANNELS … #define DSI_TX_FIFO_SIZE … #define DSI_RX_FIFO_SIZE … #define DSI_XFER_TIMEOUT_MS … #define DSI_RX_FIFO_EMPTY … #define OLD_SCLK_MIPI_CLK_NAME … #define PS_TO_CYCLE(ps, hz) … static const char *const clk_names[5] = …; enum samsung_dsim_transfer_type { … }; enum reg_idx { … }; static const unsigned int exynos_reg_ofs[] = …; static const unsigned int exynos5433_reg_ofs[] = …; enum reg_value_idx { … }; static const unsigned int reg_values[] = …; static const unsigned int exynos5422_reg_values[] = …; static const unsigned int exynos5433_reg_values[] = …; static const unsigned int imx8mm_dsim_reg_values[] = …; static const struct samsung_dsim_driver_data exynos3_dsi_driver_data = …; static const struct samsung_dsim_driver_data exynos4_dsi_driver_data = …; static const struct samsung_dsim_driver_data exynos5_dsi_driver_data = …; static const struct samsung_dsim_driver_data exynos5433_dsi_driver_data = …; static const struct samsung_dsim_driver_data exynos5422_dsi_driver_data = …; static const struct samsung_dsim_driver_data imx8mm_dsi_driver_data = …; static const struct samsung_dsim_driver_data * samsung_dsim_types[DSIM_TYPE_COUNT] = …; static inline struct samsung_dsim *host_to_dsi(struct mipi_dsi_host *h) { … } static inline struct samsung_dsim *bridge_to_dsi(struct drm_bridge *b) { … } static inline void samsung_dsim_write(struct samsung_dsim *dsi, enum reg_idx idx, u32 val) { … } static inline u32 samsung_dsim_read(struct samsung_dsim *dsi, enum reg_idx idx) { … } static void samsung_dsim_wait_for_reset(struct samsung_dsim *dsi) { … } static void samsung_dsim_reset(struct samsung_dsim *dsi) { … } #ifndef MHZ #define MHZ … #endif static unsigned long samsung_dsim_pll_find_pms(struct samsung_dsim *dsi, unsigned long fin, unsigned long fout, u8 *p, u16 *m, u8 *s) { … } static unsigned long samsung_dsim_set_pll(struct samsung_dsim *dsi, unsigned long freq) { … } static int samsung_dsim_enable_clock(struct samsung_dsim *dsi) { … } static void samsung_dsim_set_phy_ctrl(struct samsung_dsim *dsi) { … } static void samsung_dsim_disable_clock(struct samsung_dsim *dsi) { … } static void samsung_dsim_enable_lane(struct samsung_dsim *dsi, u32 lane) { … } static int samsung_dsim_init_link(struct samsung_dsim *dsi) { … } static void samsung_dsim_set_display_mode(struct samsung_dsim *dsi) { … } static void samsung_dsim_set_display_enable(struct samsung_dsim *dsi, bool enable) { … } static int samsung_dsim_wait_for_hdr_fifo(struct samsung_dsim *dsi) { … } static void samsung_dsim_set_cmd_lpm(struct samsung_dsim *dsi, bool lpm) { … } static void samsung_dsim_force_bta(struct samsung_dsim *dsi) { … } static void samsung_dsim_send_to_fifo(struct samsung_dsim *dsi, struct samsung_dsim_transfer *xfer) { … } static void samsung_dsim_read_from_fifo(struct samsung_dsim *dsi, struct samsung_dsim_transfer *xfer) { … } static void samsung_dsim_transfer_start(struct samsung_dsim *dsi) { … } static bool samsung_dsim_transfer_finish(struct samsung_dsim *dsi) { … } static void samsung_dsim_remove_transfer(struct samsung_dsim *dsi, struct samsung_dsim_transfer *xfer) { … } static int samsung_dsim_transfer(struct samsung_dsim *dsi, struct samsung_dsim_transfer *xfer) { … } static irqreturn_t samsung_dsim_irq(int irq, void *dev_id) { … } static void samsung_dsim_enable_irq(struct samsung_dsim *dsi) { … } static void samsung_dsim_disable_irq(struct samsung_dsim *dsi) { … } static int samsung_dsim_init(struct samsung_dsim *dsi) { … } static void samsung_dsim_atomic_pre_enable(struct drm_bridge *bridge, struct drm_bridge_state *old_bridge_state) { … } static void samsung_dsim_atomic_enable(struct drm_bridge *bridge, struct drm_bridge_state *old_bridge_state) { … } static void samsung_dsim_atomic_disable(struct drm_bridge *bridge, struct drm_bridge_state *old_bridge_state) { … } static void samsung_dsim_atomic_post_disable(struct drm_bridge *bridge, struct drm_bridge_state *old_bridge_state) { … } /* * This pixel output formats list referenced from, * AN13573 i.MX 8/RT MIPI DSI/CSI-2, Rev. 0, 21 March 2022 * 3.7.4 Pixel formats * Table 14. DSI pixel packing formats */ static const u32 samsung_dsim_pixel_output_fmts[] = …; static bool samsung_dsim_pixel_output_fmt_supported(u32 fmt) { … } static u32 * samsung_dsim_atomic_get_input_bus_fmts(struct drm_bridge *bridge, struct drm_bridge_state *bridge_state, struct drm_crtc_state *crtc_state, struct drm_connector_state *conn_state, u32 output_fmt, unsigned int *num_input_fmts) { … } static int samsung_dsim_atomic_check(struct drm_bridge *bridge, struct drm_bridge_state *bridge_state, struct drm_crtc_state *crtc_state, struct drm_connector_state *conn_state) { … } static void samsung_dsim_mode_set(struct drm_bridge *bridge, const struct drm_display_mode *mode, const struct drm_display_mode *adjusted_mode) { … } static int samsung_dsim_attach(struct drm_bridge *bridge, enum drm_bridge_attach_flags flags) { … } static const struct drm_bridge_funcs samsung_dsim_bridge_funcs = …; static irqreturn_t samsung_dsim_te_irq_handler(int irq, void *dev_id) { … } static int samsung_dsim_register_te_irq(struct samsung_dsim *dsi, struct device *dev) { … } static int samsung_dsim_host_attach(struct mipi_dsi_host *host, struct mipi_dsi_device *device) { … } static void samsung_dsim_unregister_te_irq(struct samsung_dsim *dsi) { … } static int samsung_dsim_host_detach(struct mipi_dsi_host *host, struct mipi_dsi_device *device) { … } static ssize_t samsung_dsim_host_transfer(struct mipi_dsi_host *host, const struct mipi_dsi_msg *msg) { … } static const struct mipi_dsi_host_ops samsung_dsim_ops = …; static int samsung_dsim_of_read_u32(const struct device_node *np, const char *propname, u32 *out_value, bool optional) { … } static int samsung_dsim_parse_dt(struct samsung_dsim *dsi) { … } static int generic_dsim_register_host(struct samsung_dsim *dsi) { … } static void generic_dsim_unregister_host(struct samsung_dsim *dsi) { … } static const struct samsung_dsim_host_ops generic_dsim_host_ops = …; static const struct drm_bridge_timings samsung_dsim_bridge_timings_de_high = …; static const struct drm_bridge_timings samsung_dsim_bridge_timings_de_low = …; int samsung_dsim_probe(struct platform_device *pdev) { … } EXPORT_SYMBOL_GPL(…); void samsung_dsim_remove(struct platform_device *pdev) { … } EXPORT_SYMBOL_GPL(…); static int __maybe_unused samsung_dsim_suspend(struct device *dev) { … } static int __maybe_unused samsung_dsim_resume(struct device *dev) { … } const struct dev_pm_ops samsung_dsim_pm_ops = …; EXPORT_SYMBOL_GPL(…); static const struct samsung_dsim_plat_data samsung_dsim_imx8mm_pdata = …; static const struct samsung_dsim_plat_data samsung_dsim_imx8mp_pdata = …; static const struct of_device_id samsung_dsim_of_match[] = …; MODULE_DEVICE_TABLE(of, samsung_dsim_of_match); static struct platform_driver samsung_dsim_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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