1 /* 2 * Copyright (C) 2012 Texas Instruments 3 * Author: Rob Clark <robdclark@gmail.com> 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 as published by 7 * the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12 * more details. 13 * 14 * You should have received a copy of the GNU General Public License along with 15 * this program. If not, see <http://www.gnu.org/licenses/>. 16 */ 17 18 #ifndef __TILCDC_DRV_H__ 19 #define __TILCDC_DRV_H__ 20 21 #include <linux/clk.h> 22 #include <linux/cpufreq.h> 23 #include <linux/module.h> 24 #include <linux/platform_device.h> 25 #include <linux/pm.h> 26 #include <linux/pm_runtime.h> 27 #include <linux/slab.h> 28 #include <linux/of.h> 29 #include <linux/of_device.h> 30 #include <linux/list.h> 31 32 #include <drm/drmP.h> 33 #include <drm/drm_crtc_helper.h> 34 #include <drm/drm_gem_cma_helper.h> 35 #include <drm/drm_fb_cma_helper.h> 36 37 struct tilcdc_drm_private { 38 void __iomem *mmio; 39 40 struct clk *disp_clk; /* display dpll */ 41 struct clk *clk; /* functional clock */ 42 int rev; /* IP revision */ 43 44 /* don't attempt resolutions w/ higher W * H * Hz: */ 45 uint32_t max_bandwidth; 46 47 /* register contents saved across suspend/resume: */ 48 u32 saved_register[12]; 49 50 #ifdef CONFIG_CPU_FREQ 51 struct notifier_block freq_transition; 52 unsigned int lcd_fck_rate; 53 #endif 54 55 struct workqueue_struct *wq; 56 57 struct drm_fbdev_cma *fbdev; 58 59 struct drm_crtc *crtc; 60 61 unsigned int num_encoders; 62 struct drm_encoder *encoders[8]; 63 64 unsigned int num_connectors; 65 struct drm_connector *connectors[8]; 66 }; 67 68 /* Sub-module for display. Since we don't know at compile time what panels 69 * or display adapter(s) might be present (for ex, off chip dvi/tfp410, 70 * hdmi encoder, various lcd panels), the connector/encoder(s) are split into 71 * separate drivers. If they are probed and found to be present, they 72 * register themselves with tilcdc_register_module(). 73 */ 74 struct tilcdc_module; 75 76 struct tilcdc_module_ops { 77 /* create appropriate encoders/connectors: */ 78 int (*modeset_init)(struct tilcdc_module *mod, struct drm_device *dev); 79 void (*destroy)(struct tilcdc_module *mod); 80 #ifdef CONFIG_DEBUG_FS 81 /* create debugfs nodes (can be NULL): */ 82 int (*debugfs_init)(struct tilcdc_module *mod, struct drm_minor *minor); 83 /* cleanup debugfs nodes (can be NULL): */ 84 void (*debugfs_cleanup)(struct tilcdc_module *mod, struct drm_minor *minor); 85 #endif 86 }; 87 88 struct tilcdc_module { 89 const char *name; 90 struct list_head list; 91 const struct tilcdc_module_ops *funcs; 92 }; 93 94 void tilcdc_module_init(struct tilcdc_module *mod, const char *name, 95 const struct tilcdc_module_ops *funcs); 96 void tilcdc_module_cleanup(struct tilcdc_module *mod); 97 98 99 /* Panel config that needs to be set in the crtc, but is not coming from 100 * the mode timings. The display module is expected to call 101 * tilcdc_crtc_set_panel_info() to set this during modeset. 102 */ 103 struct tilcdc_panel_info { 104 105 /* AC Bias Pin Frequency */ 106 uint32_t ac_bias; 107 108 /* AC Bias Pin Transitions per Interrupt */ 109 uint32_t ac_bias_intrpt; 110 111 /* DMA burst size */ 112 uint32_t dma_burst_sz; 113 114 /* Bits per pixel */ 115 uint32_t bpp; 116 117 /* FIFO DMA Request Delay */ 118 uint32_t fdd; 119 120 /* TFT Alternative Signal Mapping (Only for active) */ 121 bool tft_alt_mode; 122 123 /* Invert pixel clock */ 124 bool invert_pxl_clk; 125 126 /* Horizontal and Vertical Sync Edge: 0=rising 1=falling */ 127 uint32_t sync_edge; 128 129 /* Horizontal and Vertical Sync: Control: 0=ignore */ 130 uint32_t sync_ctrl; 131 132 /* Raster Data Order Select: 1=Most-to-least 0=Least-to-most */ 133 uint32_t raster_order; 134 135 /* DMA FIFO threshold */ 136 uint32_t fifo_th; 137 }; 138 139 #define DBG(fmt, ...) DRM_DEBUG(fmt"\n", ##__VA_ARGS__) 140 141 struct drm_crtc *tilcdc_crtc_create(struct drm_device *dev); 142 void tilcdc_crtc_cancel_page_flip(struct drm_crtc *crtc, struct drm_file *file); 143 irqreturn_t tilcdc_crtc_irq(struct drm_crtc *crtc); 144 void tilcdc_crtc_update_clk(struct drm_crtc *crtc); 145 void tilcdc_crtc_set_panel_info(struct drm_crtc *crtc, 146 const struct tilcdc_panel_info *info); 147 int tilcdc_crtc_mode_valid(struct drm_crtc *crtc, struct drm_display_mode *mode); 148 int tilcdc_crtc_max_width(struct drm_crtc *crtc); 149 150 #endif /* __TILCDC_DRV_H__ */ 151