// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2023, STMicroelectronics - All Rights Reserved * Author(s): Raphaël GALLAIS-POU <[email protected]> for STMicroelectronics. */ #include <drm/drm_atomic_helper.h> #include <drm/drm_bridge.h> #include <drm/drm_device.h> #include <drm/drm_of.h> #include <drm/drm_panel.h> #include <drm/drm_print.h> #include <drm/drm_probe_helper.h> #include <linux/clk.h> #include <linux/clk-provider.h> #include <linux/io.h> #include <linux/iopoll.h> #include <linux/media-bus-format.h> #include <linux/module.h> #include <linux/of_device.h> #include <linux/platform_device.h> #include <linux/reset.h> /* LVDS Host registers */ #define LVDS_CR … #define LVDS_DMLCR0 … #define LVDS_DMMCR0 … #define LVDS_DMLCR1 … #define LVDS_DMMCR1 … #define LVDS_DMLCR2 … #define LVDS_DMMCR2 … #define LVDS_DMLCR3 … #define LVDS_DMMCR3 … #define LVDS_DMLCR4 … #define LVDS_DMMCR4 … #define LVDS_CDL1CR … #define LVDS_CDL2CR … #define CDL1CR_DEFAULT … #define CDL2CR_DEFAULT … #define LVDS_DMLCR(bit) … #define LVDS_DMMCR(bit) … /* LVDS Wrapper registers */ #define LVDS_WCLKCR … #define LVDS_HWCFGR … #define LVDS_VERR … #define LVDS_IPIDR … #define LVDS_SIDR … /* Bitfield description */ #define CR_LVDSEN … #define CR_HSPOL … #define CR_VSPOL … #define CR_DEPOL … #define CR_CI … #define CR_LKMOD … #define CR_LKPHA … #define CR_LK1POL … #define CR_LK2POL … #define DMMCR_MAP0 … #define DMMCR_MAP1 … #define DMMCR_MAP2 … #define DMMCR_MAP3 … #define DMLCR_MAP4 … #define DMLCR_MAP5 … #define DMLCR_MAP6 … #define CDLCR_DISTR0 … #define CDLCR_DISTR1 … #define CDLCR_DISTR2 … #define CDLCR_DISTR3 … #define CDLCR_DISTR4 … #define PHY_GCR_BIT_CLK_OUT … #define PHY_GCR_LS_CLK_OUT … #define PHY_GCR_DP_CLK_OUT … #define PHY_GCR_RSTZ … #define PHY_GCR_DIV_RSTN … #define PHY_SCR_TX_EN … /* Current mode driver enable */ #define PHY_CMCR_CM_EN_DL … #define PHY_CMCR_CM_EN_DL4 … /* Bias enable */ #define PHY_BCR1_EN_BIAS_DL … #define PHY_BCR2_BIAS_EN … /* Voltage mode driver enable */ #define PHY_BCR3_VM_EN_DL … #define PHY_DCR_POWER_OK … #define PHY_CFGCR_EN_DIG_DL … #define PHY_PLLCR1_PLL_EN … #define PHY_PLLCR1_EN_SD … #define PHY_PLLCR1_EN_TWG … #define PHY_PLLCR1_DIV_EN … #define PHY_PLLCR2_NDIV … #define PHY_PLLCR2_BDIV … #define PHY_PLLSR_PLL_LOCK … #define PHY_PLLSDCR1_MDIV … #define PHY_PLLTESTCR_TDIV … #define PHY_PLLTESTCR_CLK_EN … #define PHY_PLLTESTCR_EN … #define WCLKCR_SECND_CLKPIX_SEL … #define WCLKCR_SRCSEL … /* Sleep & timeout for pll lock/unlock */ #define SLEEP_US … #define TIMEOUT_US … /* * The link phase defines whether an ODD pixel is carried over together with * the next EVEN pixel or together with the previous EVEN pixel. * * LVDS_DUAL_LINK_EVEN_ODD_PIXELS (LKPHA = 0) * * ,--------. ,--------. ,--------. ,--------. ,---------. * | ODD LK \/ PIXEL 3 \/ PIXEL 1 \/ PIXEL' 1 \/ PIXEL' 3 | * | EVEN LK /\ PIXEL 2 /\ PIXEL' 0 /\ PIXEL' 2 /\ PIXEL' 4 | * `--------' `--------' `--------' `--------' `---------' * * LVDS_DUAL_LINK_ODD_EVEN_PIXELS (LKPHA = 1) * * ,--------. ,--------. ,--------. ,--------. ,---------. * | ODD LK \/ PIXEL 3 \/ PIXEL 1 \/ PIXEL' 1 \/ PIXEL' 3 | * | EVEN LK /\ PIXEL 4 /\ PIXEL 2 /\ PIXEL' 0 /\ PIXEL' 2 | * `--------' `--------' `--------' `--------' `---------' * */ enum lvds_link_type { … }; enum lvds_pixel { … }; struct phy_reg_offsets { … }; struct lvds_phy_info { … }; static struct lvds_phy_info lvds_phy_16ff_primary = …; static struct lvds_phy_info lvds_phy_16ff_secondary = …; struct stm_lvds { … }; #define bridge_to_stm_lvds(b) … #define connector_to_stm_lvds(c) … #define lvds_is_dual_link(lvds) … static inline void lvds_write(struct stm_lvds *lvds, u32 reg, u32 val) { … } static inline u32 lvds_read(struct stm_lvds *lvds, u32 reg) { … } static inline void lvds_set(struct stm_lvds *lvds, u32 reg, u32 mask) { … } static inline void lvds_clear(struct stm_lvds *lvds, u32 reg, u32 mask) { … } /* * Expected JEIDA-RGB888 data to be sent in LSB format * bit6 ............................bit0 * CHAN0 {ONE, ONE, ZERO, ZERO, ZERO, ONE, ONE} * CHAN1 {G2, R7, R6, R5, R4, R3, R2} * CHAN2 {B3, B2, G7, G6, G5, G4, G3} * CHAN3 {DE, VS, HS, B7, B6, B5, B4} * CHAN4 {CE, B1, B0, G1, G0, R1, R0} */ static enum lvds_pixel lvds_bitmap_jeida_rgb888[5][7] = …; /* * Expected VESA-RGB888 data to be sent in LSB format * bit6 ............................bit0 * CHAN0 {ONE, ONE, ZERO, ZERO, ZERO, ONE, ONE} * CHAN1 {G0, R5, R4, R3, R2, R1, R0} * CHAN2 {B1, B0, G5, G4, G3, G2, G1} * CHAN3 {DE, VS, HS, B5, B4, B3, B2} * CHAN4 {CE, B7, B6, G7, G6, R7, R6} */ static enum lvds_pixel lvds_bitmap_vesa_rgb888[5][7] = …; /* * Clocks and PHY related functions */ static int lvds_pll_enable(struct stm_lvds *lvds, struct lvds_phy_info *phy) { … } static int pll_get_clkout_khz(int clkin_khz, int bdiv, int mdiv, int ndiv) { … } #define TDIV … #define NDIV_MIN … #define NDIV_MAX … #define BDIV_MIN … #define BDIV_MAX … #define MDIV_MIN … #define MDIV_MAX … static int lvds_pll_get_params(struct stm_lvds *lvds, unsigned int clkin_khz, unsigned int clkout_khz, unsigned int *bdiv, unsigned int *mdiv, unsigned int *ndiv) { … } static void lvds_pll_config(struct stm_lvds *lvds, struct lvds_phy_info *phy) { … } static int lvds_pixel_clk_enable(struct clk_hw *hw) { … } static void lvds_pixel_clk_disable(struct clk_hw *hw) { … } static unsigned long lvds_pixel_clk_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) { … } static long lvds_pixel_clk_round_rate(struct clk_hw *hw, unsigned long rate, unsigned long *parent_rate) { … } static const struct clk_ops lvds_pixel_clk_ops = …; static const struct clk_init_data clk_data = …; static void lvds_pixel_clk_unregister(void *data) { … } static int lvds_pixel_clk_register(struct stm_lvds *lvds) { … } /* * Host configuration related */ static void lvds_config_data_mapping(struct stm_lvds *lvds) { … } static void lvds_config_mode(struct stm_lvds *lvds) { … } static int lvds_connector_get_modes(struct drm_connector *connector) { … } static int lvds_connector_atomic_check(struct drm_connector *connector, struct drm_atomic_state *state) { … } static const struct drm_connector_helper_funcs lvds_conn_helper_funcs = …; static const struct drm_connector_funcs lvds_conn_funcs = …; static int lvds_attach(struct drm_bridge *bridge, enum drm_bridge_attach_flags flags) { … } static void lvds_atomic_enable(struct drm_bridge *bridge, struct drm_bridge_state *old_bridge_state) { … } static void lvds_atomic_disable(struct drm_bridge *bridge, struct drm_bridge_state *old_bridge_state) { … } static const struct drm_bridge_funcs lvds_bridge_funcs = …; static int lvds_probe(struct platform_device *pdev) { … } static void lvds_remove(struct platform_device *pdev) { … } static const struct of_device_id lvds_dt_ids[] = …; MODULE_DEVICE_TABLE(of, lvds_dt_ids); static struct platform_driver lvds_platform_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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