| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Paul Cercueil | 3693 | 99.62% | 11 | 68.75% |
| H. Nikolaus Schaller | 7 | 0.19% | 1 | 6.25% |
| Laurent Pinchart | 4 | 0.11% | 3 | 18.75% |
| Boris Brezillon | 3 | 0.08% | 1 | 6.25% |
| Total | 3707 | 16 |
// SPDX-License-Identifier: GPL-2.0 // // Ingenic JZ47xx KMS driver // // Copyright (C) 2019, Paul Cercueil <paul@crapouillou.net> #include <linux/clk.h> #include <linux/dma-mapping.h> #include <linux/module.h> #include <linux/of_device.h> #include <linux/platform_device.h> #include <linux/regmap.h> #include <drm/drm_atomic.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_bridge.h> #include <drm/drm_crtc.h> #include <drm/drm_crtc_helper.h> #include <drm/drm_drv.h> #include <drm/drm_gem_cma_helper.h> #include <drm/drm_fb_cma_helper.h> #include <drm/drm_fb_helper.h> #include <drm/drm_fourcc.h> #include <drm/drm_gem_framebuffer_helper.h> #include <drm/drm_irq.h> #include <drm/drm_of.h> #include <drm/drm_panel.h> #include <drm/drm_plane.h> #include <drm/drm_plane_helper.h> #include <drm/drm_probe_helper.h> #include <drm/drm_vblank.h> #define JZ_REG_LCD_CFG 0x00 #define JZ_REG_LCD_VSYNC 0x04 #define JZ_REG_LCD_HSYNC 0x08 #define JZ_REG_LCD_VAT 0x0C #define JZ_REG_LCD_DAH 0x10 #define JZ_REG_LCD_DAV 0x14 #define JZ_REG_LCD_PS 0x18 #define JZ_REG_LCD_CLS 0x1C #define JZ_REG_LCD_SPL 0x20 #define JZ_REG_LCD_REV 0x24 #define JZ_REG_LCD_CTRL 0x30 #define JZ_REG_LCD_STATE 0x34 #define JZ_REG_LCD_IID 0x38 #define JZ_REG_LCD_DA0 0x40 #define JZ_REG_LCD_SA0 0x44 #define JZ_REG_LCD_FID0 0x48 #define JZ_REG_LCD_CMD0 0x4C #define JZ_REG_LCD_DA1 0x50 #define JZ_REG_LCD_SA1 0x54 #define JZ_REG_LCD_FID1 0x58 #define JZ_REG_LCD_CMD1 0x5C #define JZ_LCD_CFG_SLCD BIT(31) #define JZ_LCD_CFG_PS_DISABLE BIT(23) #define JZ_LCD_CFG_CLS_DISABLE BIT(22) #define JZ_LCD_CFG_SPL_DISABLE BIT(21) #define JZ_LCD_CFG_REV_DISABLE BIT(20) #define JZ_LCD_CFG_HSYNCM BIT(19) #define JZ_LCD_CFG_PCLKM BIT(18) #define JZ_LCD_CFG_INV BIT(17) #define JZ_LCD_CFG_SYNC_DIR BIT(16) #define JZ_LCD_CFG_PS_POLARITY BIT(15) #define JZ_LCD_CFG_CLS_POLARITY BIT(14) #define JZ_LCD_CFG_SPL_POLARITY BIT(13) #define JZ_LCD_CFG_REV_POLARITY BIT(12) #define JZ_LCD_CFG_HSYNC_ACTIVE_LOW BIT(11) #define JZ_LCD_CFG_PCLK_FALLING_EDGE BIT(10) #define JZ_LCD_CFG_DE_ACTIVE_LOW BIT(9) #define JZ_LCD_CFG_VSYNC_ACTIVE_LOW BIT(8) #define JZ_LCD_CFG_18_BIT BIT(7) #define JZ_LCD_CFG_PDW (BIT(5) | BIT(4)) #define JZ_LCD_CFG_MODE_GENERIC_16BIT 0 #define JZ_LCD_CFG_MODE_GENERIC_18BIT BIT(7) #define JZ_LCD_CFG_MODE_GENERIC_24BIT BIT(6) #define JZ_LCD_CFG_MODE_SPECIAL_TFT_1 1 #define JZ_LCD_CFG_MODE_SPECIAL_TFT_2 2 #define JZ_LCD_CFG_MODE_SPECIAL_TFT_3 3 #define JZ_LCD_CFG_MODE_TV_OUT_P 4 #define JZ_LCD_CFG_MODE_TV_OUT_I 6 #define JZ_LCD_CFG_MODE_SINGLE_COLOR_STN 8 #define JZ_LCD_CFG_MODE_SINGLE_MONOCHROME_STN 9 #define JZ_LCD_CFG_MODE_DUAL_COLOR_STN 10 #define JZ_LCD_CFG_MODE_DUAL_MONOCHROME_STN 11 #define JZ_LCD_CFG_MODE_8BIT_SERIAL 12 #define JZ_LCD_CFG_MODE_LCM 13 #define JZ_LCD_VSYNC_VPS_OFFSET 16 #define JZ_LCD_VSYNC_VPE_OFFSET 0 #define JZ_LCD_HSYNC_HPS_OFFSET 16 #define JZ_LCD_HSYNC_HPE_OFFSET 0 #define JZ_LCD_VAT_HT_OFFSET 16 #define JZ_LCD_VAT_VT_OFFSET 0 #define JZ_LCD_DAH_HDS_OFFSET 16 #define JZ_LCD_DAH_HDE_OFFSET 0 #define JZ_LCD_DAV_VDS_OFFSET 16 #define JZ_LCD_DAV_VDE_OFFSET 0 #define JZ_LCD_CTRL_BURST_4 (0x0 << 28) #define JZ_LCD_CTRL_BURST_8 (0x1 << 28) #define JZ_LCD_CTRL_BURST_16 (0x2 << 28) #define JZ_LCD_CTRL_RGB555 BIT(27) #define JZ_LCD_CTRL_OFUP BIT(26) #define JZ_LCD_CTRL_FRC_GRAYSCALE_16 (0x0 << 24) #define JZ_LCD_CTRL_FRC_GRAYSCALE_4 (0x1 << 24) #define JZ_LCD_CTRL_FRC_GRAYSCALE_2 (0x2 << 24) #define JZ_LCD_CTRL_PDD_MASK (0xff << 16) #define JZ_LCD_CTRL_EOF_IRQ BIT(13) #define JZ_LCD_CTRL_SOF_IRQ BIT(12) #define JZ_LCD_CTRL_OFU_IRQ BIT(11) #define JZ_LCD_CTRL_IFU0_IRQ BIT(10) #define JZ_LCD_CTRL_IFU1_IRQ BIT(9) #define JZ_LCD_CTRL_DD_IRQ BIT(8) #define JZ_LCD_CTRL_QDD_IRQ BIT(7) #define JZ_LCD_CTRL_REVERSE_ENDIAN BIT(6) #define JZ_LCD_CTRL_LSB_FISRT BIT(5) #define JZ_LCD_CTRL_DISABLE BIT(4) #define JZ_LCD_CTRL_ENABLE BIT(3) #define JZ_LCD_CTRL_BPP_1 0x0 #define JZ_LCD_CTRL_BPP_2 0x1 #define JZ_LCD_CTRL_BPP_4 0x2 #define JZ_LCD_CTRL_BPP_8 0x3 #define JZ_LCD_CTRL_BPP_15_16 0x4 #define JZ_LCD_CTRL_BPP_18_24 0x5 #define JZ_LCD_CTRL_BPP_MASK (JZ_LCD_CTRL_RGB555 | (0x7 << 0)) #define JZ_LCD_CMD_SOF_IRQ BIT(31) #define JZ_LCD_CMD_EOF_IRQ BIT(30) #define JZ_LCD_CMD_ENABLE_PAL BIT(28) #define JZ_LCD_SYNC_MASK 0x3ff #define JZ_LCD_STATE_EOF_IRQ BIT(5) #define JZ_LCD_STATE_SOF_IRQ BIT(4) #define JZ_LCD_STATE_DISABLED BIT(0) struct ingenic_dma_hwdesc { u32 next; u32 addr; u32 id; u32 cmd; } __packed; struct jz_soc_info { bool needs_dev_clk; unsigned int max_width, max_height; }; struct ingenic_drm { struct drm_device drm; struct drm_plane primary; struct drm_crtc crtc; struct drm_encoder encoder; struct device *dev; struct regmap *map; struct clk *lcd_clk, *pix_clk; const struct jz_soc_info *soc_info; struct ingenic_dma_hwdesc *dma_hwdesc; dma_addr_t dma_hwdesc_phys; bool panel_is_sharp; }; static const u32 ingenic_drm_primary_formats[] = { DRM_FORMAT_XRGB1555, DRM_FORMAT_RGB565, DRM_FORMAT_XRGB8888, }; static bool ingenic_drm_writeable_reg(struct device *dev, unsigned int reg) { switch (reg) { case JZ_REG_LCD_IID: case JZ_REG_LCD_SA0: case JZ_REG_LCD_FID0: case JZ_REG_LCD_CMD0: case JZ_REG_LCD_SA1: case JZ_REG_LCD_FID1: case JZ_REG_LCD_CMD1: return false; default: return true; } } static const struct regmap_config ingenic_drm_regmap_config = { .reg_bits = 32, .val_bits = 32, .reg_stride = 4, .max_register = JZ_REG_LCD_CMD1, .writeable_reg = ingenic_drm_writeable_reg, }; static inline struct ingenic_drm *drm_device_get_priv(struct drm_device *drm) { return container_of(drm, struct ingenic_drm, drm); } static inline struct ingenic_drm *drm_crtc_get_priv(struct drm_crtc *crtc) { return container_of(crtc, struct ingenic_drm, crtc); } static inline struct ingenic_drm * drm_encoder_get_priv(struct drm_encoder *encoder) { return container_of(encoder, struct ingenic_drm, encoder); } static inline struct ingenic_drm *drm_plane_get_priv(struct drm_plane *plane) { return container_of(plane, struct ingenic_drm, primary); } static void ingenic_drm_crtc_atomic_enable(struct drm_crtc *crtc, struct drm_crtc_state *state) { struct ingenic_drm *priv = drm_crtc_get_priv(crtc); regmap_write(priv->map, JZ_REG_LCD_STATE, 0); regmap_update_bits(priv->map, JZ_REG_LCD_CTRL, JZ_LCD_CTRL_ENABLE | JZ_LCD_CTRL_DISABLE, JZ_LCD_CTRL_ENABLE); drm_crtc_vblank_on(crtc); } static void ingenic_drm_crtc_atomic_disable(struct drm_crtc *crtc, struct drm_crtc_state *state) { struct ingenic_drm *priv = drm_crtc_get_priv(crtc); unsigned int var; drm_crtc_vblank_off(crtc); regmap_update_bits(priv->map, JZ_REG_LCD_CTRL, JZ_LCD_CTRL_DISABLE, JZ_LCD_CTRL_DISABLE); regmap_read_poll_timeout(priv->map, JZ_REG_LCD_STATE, var, var & JZ_LCD_STATE_DISABLED, 1000, 0); } static void ingenic_drm_crtc_update_timings(struct ingenic_drm *priv, struct drm_display_mode *mode) { unsigned int vpe, vds, vde, vt, hpe, hds, hde, ht; vpe = mode->vsync_end - mode->vsync_start; vds = mode->vtotal - mode->vsync_start; vde = vds + mode->vdisplay; vt = vde + mode->vsync_start - mode->vdisplay; hpe = mode->hsync_end - mode->hsync_start; hds = mode->htotal - mode->hsync_start; hde = hds + mode->hdisplay; ht = hde + mode->hsync_start - mode->hdisplay; regmap_write(priv->map, JZ_REG_LCD_VSYNC, 0 << JZ_LCD_VSYNC_VPS_OFFSET | vpe << JZ_LCD_VSYNC_VPE_OFFSET); regmap_write(priv->map, JZ_REG_LCD_HSYNC, 0 << JZ_LCD_HSYNC_HPS_OFFSET | hpe << JZ_LCD_HSYNC_HPE_OFFSET); regmap_write(priv->map, JZ_REG_LCD_VAT, ht << JZ_LCD_VAT_HT_OFFSET | vt << JZ_LCD_VAT_VT_OFFSET); regmap_write(priv->map, JZ_REG_LCD_DAH, hds << JZ_LCD_DAH_HDS_OFFSET | hde << JZ_LCD_DAH_HDE_OFFSET); regmap_write(priv->map, JZ_REG_LCD_DAV, vds << JZ_LCD_DAV_VDS_OFFSET | vde << JZ_LCD_DAV_VDE_OFFSET); if (priv->panel_is_sharp) { regmap_write(priv->map, JZ_REG_LCD_PS, hde << 16 | (hde + 1)); regmap_write(priv->map, JZ_REG_LCD_CLS, hde << 16 | (hde + 1)); regmap_write(priv->map, JZ_REG_LCD_SPL, hpe << 16 | (hpe + 1)); regmap_write(priv->map, JZ_REG_LCD_REV, mode->htotal << 16); } } static void ingenic_drm_crtc_update_ctrl(struct ingenic_drm *priv, const struct drm_format_info *finfo) { unsigned int ctrl = JZ_LCD_CTRL_OFUP | JZ_LCD_CTRL_BURST_16; switch (finfo->format) { case DRM_FORMAT_XRGB1555: ctrl |= JZ_LCD_CTRL_RGB555; /* fall-through */ case DRM_FORMAT_RGB565: ctrl |= JZ_LCD_CTRL_BPP_15_16; break; case DRM_FORMAT_XRGB8888: ctrl |= JZ_LCD_CTRL_BPP_18_24; break; } regmap_update_bits(priv->map, JZ_REG_LCD_CTRL, JZ_LCD_CTRL_OFUP | JZ_LCD_CTRL_BURST_16 | JZ_LCD_CTRL_BPP_MASK, ctrl); } static int ingenic_drm_crtc_atomic_check(struct drm_crtc *crtc, struct drm_crtc_state *state) { struct ingenic_drm *priv = drm_crtc_get_priv(crtc); long rate; if (!drm_atomic_crtc_needs_modeset(state)) return 0; if (state->mode.hdisplay > priv->soc_info->max_width || state->mode.vdisplay > priv->soc_info->max_height) return -EINVAL; rate = clk_round_rate(priv->pix_clk, state->adjusted_mode.clock * 1000); if (rate < 0) return rate; return 0; } static void ingenic_drm_crtc_atomic_flush(struct drm_crtc *crtc, struct drm_crtc_state *oldstate) { struct ingenic_drm *priv = drm_crtc_get_priv(crtc); struct drm_crtc_state *state = crtc->state; struct drm_pending_vblank_event *event = state->event; struct drm_framebuffer *drm_fb = crtc->primary->state->fb; const struct drm_format_info *finfo; if (drm_atomic_crtc_needs_modeset(state)) { finfo = drm_format_info(drm_fb->format->format); ingenic_drm_crtc_update_timings(priv, &state->mode); ingenic_drm_crtc_update_ctrl(priv, finfo); clk_set_rate(priv->pix_clk, state->adjusted_mode.clock * 1000); regmap_write(priv->map, JZ_REG_LCD_DA0, priv->dma_hwdesc->next); } if (event) { state->event = NULL; spin_lock_irq(&crtc->dev->event_lock); if (drm_crtc_vblank_get(crtc) == 0) drm_crtc_arm_vblank_event(crtc, event); else drm_crtc_send_vblank_event(crtc, event); spin_unlock_irq(&crtc->dev->event_lock); } } static void ingenic_drm_plane_atomic_update(struct drm_plane *plane, struct drm_plane_state *oldstate) { struct ingenic_drm *priv = drm_plane_get_priv(plane); struct drm_plane_state *state = plane->state; unsigned int width, height, cpp; dma_addr_t addr; if (state && state->fb) { addr = drm_fb_cma_get_gem_addr(state->fb, state, 0); width = state->src_w >> 16; height = state->src_h >> 16; cpp = state->fb->format->cpp[plane->index]; priv->dma_hwdesc->addr = addr; priv->dma_hwdesc->cmd = width * height * cpp / 4; priv->dma_hwdesc->cmd |= JZ_LCD_CMD_EOF_IRQ; } } static void ingenic_drm_encoder_atomic_mode_set(struct drm_encoder *encoder, struct drm_crtc_state *crtc_state, struct drm_connector_state *conn_state) { struct ingenic_drm *priv = drm_encoder_get_priv(encoder); struct drm_display_mode *mode = &crtc_state->adjusted_mode; struct drm_connector *conn = conn_state->connector; struct drm_display_info *info = &conn->display_info; unsigned int cfg; priv->panel_is_sharp = info->bus_flags & DRM_BUS_FLAG_SHARP_SIGNALS; if (priv->panel_is_sharp) { cfg = JZ_LCD_CFG_MODE_SPECIAL_TFT_1 | JZ_LCD_CFG_REV_POLARITY; } else { cfg = JZ_LCD_CFG_PS_DISABLE | JZ_LCD_CFG_CLS_DISABLE | JZ_LCD_CFG_SPL_DISABLE | JZ_LCD_CFG_REV_DISABLE; } if (mode->flags & DRM_MODE_FLAG_NHSYNC) cfg |= JZ_LCD_CFG_HSYNC_ACTIVE_LOW; if (mode->flags & DRM_MODE_FLAG_NVSYNC) cfg |= JZ_LCD_CFG_VSYNC_ACTIVE_LOW; if (info->bus_flags & DRM_BUS_FLAG_DE_LOW) cfg |= JZ_LCD_CFG_DE_ACTIVE_LOW; if (info->bus_flags & DRM_BUS_FLAG_PIXDATA_NEGEDGE) cfg |= JZ_LCD_CFG_PCLK_FALLING_EDGE; if (!priv->panel_is_sharp) { if (conn->connector_type == DRM_MODE_CONNECTOR_TV) { if (mode->flags & DRM_MODE_FLAG_INTERLACE) cfg |= JZ_LCD_CFG_MODE_TV_OUT_I; else cfg |= JZ_LCD_CFG_MODE_TV_OUT_P; } else { switch (*info->bus_formats) { case MEDIA_BUS_FMT_RGB565_1X16: cfg |= JZ_LCD_CFG_MODE_GENERIC_16BIT; break; case MEDIA_BUS_FMT_RGB666_1X18: cfg |= JZ_LCD_CFG_MODE_GENERIC_18BIT; break; case MEDIA_BUS_FMT_RGB888_1X24: cfg |= JZ_LCD_CFG_MODE_GENERIC_24BIT; break; case MEDIA_BUS_FMT_RGB888_3X8: cfg |= JZ_LCD_CFG_MODE_8BIT_SERIAL; break; default: break; } } } regmap_write(priv->map, JZ_REG_LCD_CFG, cfg); } static int ingenic_drm_encoder_atomic_check(struct drm_encoder *encoder, struct drm_crtc_state *crtc_state, struct drm_connector_state *conn_state) { struct drm_display_info *info = &conn_state->connector->display_info; if (info->num_bus_formats != 1) return -EINVAL; if (conn_state->connector->connector_type == DRM_MODE_CONNECTOR_TV) return 0; switch (*info->bus_formats) { case MEDIA_BUS_FMT_RGB565_1X16: case MEDIA_BUS_FMT_RGB666_1X18: case MEDIA_BUS_FMT_RGB888_1X24: case MEDIA_BUS_FMT_RGB888_3X8: return 0; default: return -EINVAL; } } static irqreturn_t ingenic_drm_irq_handler(int irq, void *arg) { struct ingenic_drm *priv = drm_device_get_priv(arg); unsigned int state; regmap_read(priv->map, JZ_REG_LCD_STATE, &state); regmap_update_bits(priv->map, JZ_REG_LCD_STATE, JZ_LCD_STATE_EOF_IRQ, 0); if (state & JZ_LCD_STATE_EOF_IRQ) drm_crtc_handle_vblank(&priv->crtc); return IRQ_HANDLED; } static void ingenic_drm_release(struct drm_device *drm) { struct ingenic_drm *priv = drm_device_get_priv(drm); drm_mode_config_cleanup(drm); drm_dev_fini(drm); kfree(priv); } static int ingenic_drm_enable_vblank(struct drm_crtc *crtc) { struct ingenic_drm *priv = drm_crtc_get_priv(crtc); regmap_update_bits(priv->map, JZ_REG_LCD_CTRL, JZ_LCD_CTRL_EOF_IRQ, JZ_LCD_CTRL_EOF_IRQ); return 0; } static void ingenic_drm_disable_vblank(struct drm_crtc *crtc) { struct ingenic_drm *priv = drm_crtc_get_priv(crtc); regmap_update_bits(priv->map, JZ_REG_LCD_CTRL, JZ_LCD_CTRL_EOF_IRQ, 0); } DEFINE_DRM_GEM_CMA_FOPS(ingenic_drm_fops); static struct drm_driver ingenic_drm_driver_data = { .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC, .name = "ingenic-drm", .desc = "DRM module for Ingenic SoCs", .date = "20190422", .major = 1, .minor = 0, .patchlevel = 0, .fops = &ingenic_drm_fops, .dumb_create = drm_gem_cma_dumb_create, .gem_free_object_unlocked = drm_gem_cma_free_object, .gem_vm_ops = &drm_gem_cma_vm_ops, .prime_handle_to_fd = drm_gem_prime_handle_to_fd, .prime_fd_to_handle = drm_gem_prime_fd_to_handle, .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table, .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table, .gem_prime_vmap = drm_gem_cma_prime_vmap, .gem_prime_vunmap = drm_gem_cma_prime_vunmap, .gem_prime_mmap = drm_gem_cma_prime_mmap, .irq_handler = ingenic_drm_irq_handler, .release = ingenic_drm_release, }; static const struct drm_plane_funcs ingenic_drm_primary_plane_funcs = { .update_plane = drm_atomic_helper_update_plane, .disable_plane = drm_atomic_helper_disable_plane, .reset = drm_atomic_helper_plane_reset, .destroy = drm_plane_cleanup, .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state, .atomic_destroy_state = drm_atomic_helper_plane_destroy_state, }; static const struct drm_crtc_funcs ingenic_drm_crtc_funcs = { .set_config = drm_atomic_helper_set_config, .page_flip = drm_atomic_helper_page_flip, .reset = drm_atomic_helper_crtc_reset, .destroy = drm_crtc_cleanup, .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, .enable_vblank = ingenic_drm_enable_vblank, .disable_vblank = ingenic_drm_disable_vblank, .gamma_set = drm_atomic_helper_legacy_gamma_set, }; static const struct drm_plane_helper_funcs ingenic_drm_plane_helper_funcs = { .atomic_update = ingenic_drm_plane_atomic_update, .prepare_fb = drm_gem_fb_prepare_fb, }; static const struct drm_crtc_helper_funcs ingenic_drm_crtc_helper_funcs = { .atomic_enable = ingenic_drm_crtc_atomic_enable, .atomic_disable = ingenic_drm_crtc_atomic_disable, .atomic_flush = ingenic_drm_crtc_atomic_flush, .atomic_check = ingenic_drm_crtc_atomic_check, }; static const struct drm_encoder_helper_funcs ingenic_drm_encoder_helper_funcs = { .atomic_mode_set = ingenic_drm_encoder_atomic_mode_set, .atomic_check = ingenic_drm_encoder_atomic_check, }; static const struct drm_mode_config_funcs ingenic_drm_mode_config_funcs = { .fb_create = drm_gem_fb_create, .output_poll_changed = drm_fb_helper_output_poll_changed, .atomic_check = drm_atomic_helper_check, .atomic_commit = drm_atomic_helper_commit, }; static const struct drm_encoder_funcs ingenic_drm_encoder_funcs = { .destroy = drm_encoder_cleanup, }; static void ingenic_drm_free_dma_hwdesc(void *d) { struct ingenic_drm *priv = d; dma_free_coherent(priv->dev, sizeof(*priv->dma_hwdesc), priv->dma_hwdesc, priv->dma_hwdesc_phys); } static int ingenic_drm_probe(struct platform_device *pdev) { const struct jz_soc_info *soc_info; struct device *dev = &pdev->dev; struct ingenic_drm *priv; struct clk *parent_clk; struct drm_bridge *bridge; struct drm_panel *panel; struct drm_device *drm; void __iomem *base; long parent_rate; int ret, irq; soc_info = of_device_get_match_data(dev); if (!soc_info) { dev_err(dev, "Missing platform data\n"); return -EINVAL; } priv = kzalloc(sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; priv->soc_info = soc_info; priv->dev = dev; drm = &priv->drm; drm->dev_private = priv; platform_set_drvdata(pdev, priv); ret = devm_drm_dev_init(dev, drm, &ingenic_drm_driver_data); if (ret) { kfree(priv); return ret; } drm_mode_config_init(drm); drm->mode_config.min_width = 0; drm->mode_config.min_height = 0; drm->mode_config.max_width = soc_info->max_width; drm->mode_config.max_height = 4095; drm->mode_config.funcs = &ingenic_drm_mode_config_funcs; base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(base)) { dev_err(dev, "Failed to get memory resource"); return PTR_ERR(base); } priv->map = devm_regmap_init_mmio(dev, base, &ingenic_drm_regmap_config); if (IS_ERR(priv->map)) { dev_err(dev, "Failed to create regmap"); return PTR_ERR(priv->map); } irq = platform_get_irq(pdev, 0); if (irq < 0) { dev_err(dev, "Failed to get platform irq"); return irq; } if (soc_info->needs_dev_clk) { priv->lcd_clk = devm_clk_get(dev, "lcd"); if (IS_ERR(priv->lcd_clk)) { dev_err(dev, "Failed to get lcd clock"); return PTR_ERR(priv->lcd_clk); } } priv->pix_clk = devm_clk_get(dev, "lcd_pclk"); if (IS_ERR(priv->pix_clk)) { dev_err(dev, "Failed to get pixel clock"); return PTR_ERR(priv->pix_clk); } ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0, &panel, &bridge); if (ret) { if (ret != -EPROBE_DEFER) dev_err(dev, "Failed to get panel handle"); return ret; } if (panel) bridge = devm_drm_panel_bridge_add_typed(dev, panel, DRM_MODE_CONNECTOR_DPI); priv->dma_hwdesc = dma_alloc_coherent(dev, sizeof(*priv->dma_hwdesc), &priv->dma_hwdesc_phys, GFP_KERNEL); if (!priv->dma_hwdesc) return -ENOMEM; ret = devm_add_action_or_reset(dev, ingenic_drm_free_dma_hwdesc, priv); if (ret) return ret; priv->dma_hwdesc->next = priv->dma_hwdesc_phys; priv->dma_hwdesc->id = 0xdeafbead; drm_plane_helper_add(&priv->primary, &ingenic_drm_plane_helper_funcs); ret = drm_universal_plane_init(drm, &priv->primary, 0, &ingenic_drm_primary_plane_funcs, ingenic_drm_primary_formats, ARRAY_SIZE(ingenic_drm_primary_formats), NULL, DRM_PLANE_TYPE_PRIMARY, NULL); if (ret) { dev_err(dev, "Failed to register primary plane: %i", ret); return ret; } drm_crtc_helper_add(&priv->crtc, &ingenic_drm_crtc_helper_funcs); ret = drm_crtc_init_with_planes(drm, &priv->crtc, &priv->primary, NULL, &ingenic_drm_crtc_funcs, NULL); if (ret) { dev_err(dev, "Failed to init CRTC: %i", ret); return ret; } priv->encoder.possible_crtcs = 1; drm_encoder_helper_add(&priv->encoder, &ingenic_drm_encoder_helper_funcs); ret = drm_encoder_init(drm, &priv->encoder, &ingenic_drm_encoder_funcs, DRM_MODE_ENCODER_DPI, NULL); if (ret) { dev_err(dev, "Failed to init encoder: %i", ret); return ret; } ret = drm_bridge_attach(&priv->encoder, bridge, NULL, 0); if (ret) { dev_err(dev, "Unable to attach bridge"); return ret; } ret = drm_irq_install(drm, irq); if (ret) { dev_err(dev, "Unable to install IRQ handler"); return ret; } ret = drm_vblank_init(drm, 1); if (ret) { dev_err(dev, "Failed calling drm_vblank_init()"); return ret; } drm_mode_config_reset(drm); ret = clk_prepare_enable(priv->pix_clk); if (ret) { dev_err(dev, "Unable to start pixel clock"); return ret; } if (priv->lcd_clk) { parent_clk = clk_get_parent(priv->lcd_clk); parent_rate = clk_get_rate(parent_clk); /* LCD Device clock must be 3x the pixel clock for STN panels, * or 1.5x the pixel clock for TFT panels. To avoid having to * check for the LCD device clock everytime we do a mode change, * we set the LCD device clock to the highest rate possible. */ ret = clk_set_rate(priv->lcd_clk, parent_rate); if (ret) { dev_err(dev, "Unable to set LCD clock rate"); goto err_pixclk_disable; } ret = clk_prepare_enable(priv->lcd_clk); if (ret) { dev_err(dev, "Unable to start lcd clock"); goto err_pixclk_disable; } } ret = drm_dev_register(drm, 0); if (ret) { dev_err(dev, "Failed to register DRM driver"); goto err_devclk_disable; } ret = drm_fbdev_generic_setup(drm, 32); if (ret) dev_warn(dev, "Unable to start fbdev emulation: %i", ret); return 0; err_devclk_disable: if (priv->lcd_clk) clk_disable_unprepare(priv->lcd_clk); err_pixclk_disable: clk_disable_unprepare(priv->pix_clk); return ret; } static int ingenic_drm_remove(struct platform_device *pdev) { struct ingenic_drm *priv = platform_get_drvdata(pdev); if (priv->lcd_clk) clk_disable_unprepare(priv->lcd_clk); clk_disable_unprepare(priv->pix_clk); drm_dev_unregister(&priv->drm); drm_atomic_helper_shutdown(&priv->drm); return 0; } static const struct jz_soc_info jz4740_soc_info = { .needs_dev_clk = true, .max_width = 800, .max_height = 600, }; static const struct jz_soc_info jz4725b_soc_info = { .needs_dev_clk = false, .max_width = 800, .max_height = 600, }; static const struct jz_soc_info jz4770_soc_info = { .needs_dev_clk = false, .max_width = 1280, .max_height = 720, }; static const struct of_device_id ingenic_drm_of_match[] = { { .compatible = "ingenic,jz4740-lcd", .data = &jz4740_soc_info }, { .compatible = "ingenic,jz4725b-lcd", .data = &jz4725b_soc_info }, { .compatible = "ingenic,jz4770-lcd", .data = &jz4770_soc_info }, { /* sentinel */ }, }; MODULE_DEVICE_TABLE(of, ingenic_drm_of_match); static struct platform_driver ingenic_drm_driver = { .driver = { .name = "ingenic-drm", .of_match_table = of_match_ptr(ingenic_drm_of_match), }, .probe = ingenic_drm_probe, .remove = ingenic_drm_remove, }; module_platform_driver(ingenic_drm_driver); MODULE_AUTHOR("Paul Cercueil <paul@crapouillou.net>"); MODULE_DESCRIPTION("DRM driver for the Ingenic SoCs\n"); MODULE_LICENSE("GPL v2");
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