2 * Freescale i.MX23/i.MX28 LCDIF driver
4 * Copyright (C) 2011-2013 Marek Vasut <marex@denx.de>
6 * SPDX-License-Identifier: GPL-2.0+
13 #include <asm/arch/imx-regs.h>
14 #include <asm/arch/clock.h>
15 #include <asm/arch/sys_proto.h>
16 #include <asm/errno.h>
19 #include "videomodes.h"
21 #define PS2KHZ(ps) (1000000000UL / (ps))
23 DECLARE_GLOBAL_DATA_PTR;
25 static GraphicDevice panel;
30 * video=ctfb:x:800,y:480,depth:18,mode:0,pclk:30066,
31 * le:0,ri:256,up:0,lo:45,hs:1,vs:1,sync:100663296,vmode:0
33 * Freescale mx23evk/mx28evk with a Seiko 4.3'' WVGA panel:
35 * video=ctfb:x:800,y:480,depth:24,mode:0,pclk:29851,
36 * le:89,ri:164,up:23,lo:10,hs:10,vs:10,sync:0,vmode:0
39 static void mxs_lcd_init(GraphicDevice *panel,
40 struct ctfb_res_modes *mode, int bpp)
42 struct mxs_lcdif_regs *regs = (struct mxs_lcdif_regs *)MXS_LCDIF_BASE;
43 uint32_t word_len, bus_width;
47 /* Kick in the LCDIF clock */
48 mxs_set_lcdclk(PS2KHZ(mode->pixclock));
50 /* Restart the LCDIF block */
51 mxs_reset_block(®s->hw_lcdif_ctrl_reg);
55 word_len = LCDIF_CTRL_WORD_LENGTH_24BIT;
56 bus_width = LCDIF_CTRL_LCD_DATABUS_WIDTH_24BIT;
60 word_len = LCDIF_CTRL_WORD_LENGTH_24BIT;
61 bus_width = LCDIF_CTRL_LCD_DATABUS_WIDTH_18BIT;
65 word_len = LCDIF_CTRL_WORD_LENGTH_16BIT;
66 bus_width = LCDIF_CTRL_LCD_DATABUS_WIDTH_16BIT;
70 word_len = LCDIF_CTRL_WORD_LENGTH_8BIT;
71 bus_width = LCDIF_CTRL_LCD_DATABUS_WIDTH_8BIT;
75 printf("Invalid color depth: %d\n", bpp);
79 writel(bus_width | word_len | LCDIF_CTRL_DOTCLK_MODE |
80 LCDIF_CTRL_BYPASS_COUNT | LCDIF_CTRL_LCDIF_MASTER,
81 ®s->hw_lcdif_ctrl);
83 writel(valid_data << LCDIF_CTRL1_BYTE_PACKING_FORMAT_OFFSET,
84 ®s->hw_lcdif_ctrl1);
85 writel((mode->yres << LCDIF_TRANSFER_COUNT_V_COUNT_OFFSET) | mode->xres,
86 ®s->hw_lcdif_transfer_count);
88 if (!(mode->sync & FB_SYNC_OE_LOW_ACT))
89 vctrl0 |= LCDIF_VDCTRL0_ENABLE_POL;
91 if (mode->sync & FB_SYNC_CLK_LAT_FALL)
92 vctrl0 |= LCDIF_VDCTRL0_DOTCLK_POL;
94 if (mode->sync & FB_SYNC_HOR_HIGH_ACT)
95 vctrl0 |= LCDIF_VDCTRL0_HSYNC_POL;
97 if (mode->sync & FB_SYNC_VERT_HIGH_ACT)
98 vctrl0 |= LCDIF_VDCTRL0_VSYNC_POL;
100 writel(vctrl0 | LCDIF_VDCTRL0_ENABLE_PRESENT |
101 LCDIF_VDCTRL0_VSYNC_PERIOD_UNIT |
102 LCDIF_VDCTRL0_VSYNC_PULSE_WIDTH_UNIT |
103 mode->vsync_len, ®s->hw_lcdif_vdctrl0);
104 writel(mode->upper_margin + mode->lower_margin +
105 mode->vsync_len + mode->yres,
106 ®s->hw_lcdif_vdctrl1);
107 writel((mode->hsync_len << LCDIF_VDCTRL2_HSYNC_PULSE_WIDTH_OFFSET) |
108 (mode->left_margin + mode->right_margin +
109 mode->hsync_len + mode->xres),
110 ®s->hw_lcdif_vdctrl2);
111 writel(((mode->left_margin + mode->hsync_len) <<
112 LCDIF_VDCTRL3_HORIZONTAL_WAIT_CNT_OFFSET) |
113 (mode->upper_margin + mode->vsync_len),
114 ®s->hw_lcdif_vdctrl3);
115 writel((0 << LCDIF_VDCTRL4_DOTCLK_DLY_SEL_OFFSET) | mode->xres,
116 ®s->hw_lcdif_vdctrl4);
118 writel(panel->frameAdrs, ®s->hw_lcdif_cur_buf);
119 writel(panel->frameAdrs, ®s->hw_lcdif_next_buf);
121 /* Flush FIFO first */
122 writel(LCDIF_CTRL1_FIFO_CLEAR, ®s->hw_lcdif_ctrl1_set);
124 /* Sync signals ON */
125 setbits_le32(®s->hw_lcdif_vdctrl4, LCDIF_VDCTRL4_SYNC_SIGNALS_ON);
128 writel(LCDIF_CTRL1_FIFO_CLEAR, ®s->hw_lcdif_ctrl1_clr);
131 writel(LCDIF_CTRL_RUN, ®s->hw_lcdif_ctrl_set);
134 void *video_hw_init(void)
138 struct ctfb_res_modes mode;
142 /* Suck display configuration from "videomode" variable */
143 penv = getenv("videomode");
145 puts("MXSFB: 'videomode' variable not set!\n");
149 bpp = video_get_params(&mode, penv);
151 /* fill in Graphic device struct */
152 sprintf(panel.modeIdent, "%dx%dx%d",
153 mode.xres, mode.yres, bpp);
155 panel.winSizeX = mode.xres;
156 panel.winSizeY = mode.yres;
157 panel.plnSizeX = mode.xres;
158 panel.plnSizeY = mode.yres;
163 panel.gdfBytesPP = 4;
164 panel.gdfIndex = GDF_32BIT_X888RGB;
167 panel.gdfBytesPP = 2;
168 panel.gdfIndex = GDF_16BIT_565RGB;
171 panel.gdfBytesPP = 1;
172 panel.gdfIndex = GDF__8BIT_INDEX;
175 printf("MXSFB: Invalid BPP specified! (bpp = %i)\n", bpp);
179 panel.memSize = mode.xres * mode.yres * panel.gdfBytesPP;
181 panel.frameAdrs = gd->fb_base;
183 printf("%s\n", panel.modeIdent);
185 /* Start framebuffer */
186 mxs_lcd_init(&panel, &mode, bpp);