drivers/gpu/drm/tilcdc/tilcdc_drv.h

   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 /* Defaulting to pixel clock defined on AM335x */
  38 #define TILCDC_DEFAULT_MAX_PIXELCLOCK  126000
  39 /* Defaulting to max width as defined on AM335x */
  40 #define TILCDC_DEFAULT_MAX_WIDTH  2048
  41 /*
  42  * This may need some tweaking, but want to allow at least 1280x1024@60
  43  * with optimized DDR & EMIF settings tweaked 1920x1080@24 appears to
  44  * be supportable
  45  */
  46 #define TILCDC_DEFAULT_MAX_BANDWIDTH  (1280*1024*60)
  47
  48
  49 struct tilcdc_drm_private {
  50         void __iomem *mmio;
  51
  52         struct clk *disp_clk;    /* display dpll */
  53         struct clk *clk;         /* functional clock */
  54         int rev;                 /* IP revision */
  55
  56         /* don't attempt resolutions w/ higher W * H * Hz: */
  57         uint32_t max_bandwidth;
  58         /*
  59          * Pixel Clock will be restricted to some value as
  60          * defined in the device datasheet measured in KHz
  61          */
  62         uint32_t max_pixelclock;
  63         /*
  64          * Max allowable width is limited on a per device basis
  65          * measured in pixels
  66          */
  67         uint32_t max_width;
  68
  69         /* register contents saved across suspend/resume: */
  70         u32 saved_register[12];
  71
  72 #ifdef CONFIG_CPU_FREQ
  73         struct notifier_block freq_transition;
  74         unsigned int lcd_fck_rate;
  75 #endif
  76
  77         struct workqueue_struct *wq;
  78
  79         struct drm_fbdev_cma *fbdev;
  80
  81         struct drm_crtc *crtc;
  82
  83         unsigned int num_encoders;
  84         struct drm_encoder *encoders[8];
  85
  86         unsigned int num_connectors;
  87         struct drm_connector *connectors[8];
  88 };
  89
  90 /* Sub-module for display.  Since we don't know at compile time what panels
  91  * or display adapter(s) might be present (for ex, off chip dvi/tfp410,
  92  * hdmi encoder, various lcd panels), the connector/encoder(s) are split into
  93  * separate drivers.  If they are probed and found to be present, they
  94  * register themselves with tilcdc_register_module().
  95  */
  96 struct tilcdc_module;
  97
  98 struct tilcdc_module_ops {
  99         /* create appropriate encoders/connectors: */
 100         int (*modeset_init)(struct tilcdc_module *mod, struct drm_device *dev);
 101         void (*destroy)(struct tilcdc_module *mod);
 102 #ifdef CONFIG_DEBUG_FS
 103         /* create debugfs nodes (can be NULL): */
 104         int (*debugfs_init)(struct tilcdc_module *mod, struct drm_minor *minor);
 105         /* cleanup debugfs nodes (can be NULL): */
 106         void (*debugfs_cleanup)(struct tilcdc_module *mod, struct drm_minor *minor);
 107 #endif
 108 };
 109
 110 struct tilcdc_module {
 111         const char *name;
 112         struct list_head list;
 113         const struct tilcdc_module_ops *funcs;
 114         unsigned int preferred_bpp;
 115 };
 116
 117 void tilcdc_module_init(struct tilcdc_module *mod, const char *name,
 118                 const struct tilcdc_module_ops *funcs);
 119 void tilcdc_module_cleanup(struct tilcdc_module *mod);
 120 void tilcdc_slave_probedefer(bool defered);
 121
 122 /* Panel config that needs to be set in the crtc, but is not coming from
 123  * the mode timings.  The display module is expected to call
 124  * tilcdc_crtc_set_panel_info() to set this during modeset.
 125  */
 126 struct tilcdc_panel_info {
 127
 128         /* AC Bias Pin Frequency */
 129         uint32_t ac_bias;
 130
 131         /* AC Bias Pin Transitions per Interrupt */
 132         uint32_t ac_bias_intrpt;
 133
 134         /* DMA burst size */
 135         uint32_t dma_burst_sz;
 136
 137         /* Bits per pixel */
 138         uint32_t bpp;
 139
 140         /* FIFO DMA Request Delay */
 141         uint32_t fdd;
 142
 143         /* TFT Alternative Signal Mapping (Only for active) */
 144         bool tft_alt_mode;
 145
 146         /* Invert pixel clock */
 147         bool invert_pxl_clk;
 148
 149         /* Horizontal and Vertical Sync Edge: 0=rising 1=falling */
 150         uint32_t sync_edge;
 151
 152         /* Horizontal and Vertical Sync: Control: 0=ignore */
 153         uint32_t sync_ctrl;
 154
 155         /* Raster Data Order Select: 1=Most-to-least 0=Least-to-most */
 156         uint32_t raster_order;
 157
 158         /* DMA FIFO threshold */
 159         uint32_t fifo_th;
 160 };
 161
 162 #define DBG(fmt, ...) DRM_DEBUG(fmt"\n", ##__VA_ARGS__)
 163
 164 struct drm_crtc *tilcdc_crtc_create(struct drm_device *dev);
 165 void tilcdc_crtc_cancel_page_flip(struct drm_crtc *crtc, struct drm_file *file);
 166 irqreturn_t tilcdc_crtc_irq(struct drm_crtc *crtc);
 167 void tilcdc_crtc_update_clk(struct drm_crtc *crtc);
 168 void tilcdc_crtc_set_panel_info(struct drm_crtc *crtc,
 169                 const struct tilcdc_panel_info *info);
 170 int tilcdc_crtc_mode_valid(struct drm_crtc *crtc, struct drm_display_mode *mode);
 171 int tilcdc_crtc_max_width(struct drm_crtc *crtc);
 172
 173 #endif /* __TILCDC_DRV_H__ */