1 /* 2 * Copyright (C) 2013-2018 Hannes Schmelzer <oe5hpm@oevsv.at> - 3 * B&R Industrial Automation GmbH - http://www.br-automation.com 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #ifndef AM335X_FB_H 9 #define AM335X_FB_H 10 11 #define HSVS_CONTROL (0x01 << 25) /* 12 * 0 = lcd_lp and lcd_fp are driven on 13 * opposite edges of pixel clock than 14 * the lcd_pixel_o 15 * 1 = lcd_lp and lcd_fp are driven 16 * according to bit 24 Note that this 17 * bit MUST be set to '0' for Passive 18 * Matrix displays the edge timing is 19 * fixed 20 */ 21 #define HSVS_RISEFALL (0x01 << 24) /* 22 * 0 = lcd_lp and lcd_fp are driven on 23 * the rising edge of pixel clock (bit 24 * 25 must be set to 1) 25 * 1 = lcd_lp and lcd_fp are driven on 26 * the falling edge of pixel clock (bit 27 * 25 must be set to 1) 28 */ 29 #define DE_INVERT (0x01 << 23) /* 30 * 0 = DE is low-active 31 * 1 = DE is high-active 32 */ 33 #define PXCLK_INVERT (0x01 << 22) /* 34 * 0 = pix-clk is high-active 35 * 1 = pic-clk is low-active 36 */ 37 #define HSYNC_INVERT (0x01 << 21) /* 38 * 0 = HSYNC is active high 39 * 1 = HSYNC is avtive low 40 */ 41 #define VSYNC_INVERT (0x01 << 20) /* 42 * 0 = VSYNC is active high 43 * 1 = VSYNC is active low 44 */ 45 46 struct am335x_lcdpanel { 47 unsigned int hactive; /* Horizontal active area */ 48 unsigned int vactive; /* Vertical active area */ 49 unsigned int bpp; /* bits per pixel */ 50 unsigned int hfp; /* Horizontal front porch */ 51 unsigned int hbp; /* Horizontal back porch */ 52 unsigned int hsw; /* Horizontal Sync Pulse Width */ 53 unsigned int vfp; /* Vertical front porch */ 54 unsigned int vbp; /* Vertical back porch */ 55 unsigned int vsw; /* Vertical Sync Pulse Width */ 56 unsigned int pxl_clk; /* Pixel clock */ 57 unsigned int pol; /* polarity of sync, clock signals */ 58 unsigned int pup_delay; /* 59 * time in ms after power on to 60 * initialization of lcd-controller 61 * (VCC ramp up time) 62 */ 63 unsigned int pon_delay; /* 64 * time in ms after initialization of 65 * lcd-controller (pic stabilization) 66 */ 67 void (*panel_power_ctrl)(int); /* fp for power on/off display */ 68 }; 69 70 int am335xfb_init(struct am335x_lcdpanel *panel); 71 72 #endif /* AM335X_FB_H */ 73