1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2014 Freescale Semiconductor, Inc.
4 * Author: Priyanka Jain <Priyanka.Jain@freescale.com>
9 #include <linux/ctype.h>
11 #include <stdio_dev.h>
13 #include <fsl_diu_fb.h>
14 #include "../common/qixis.h"
15 #include "../common/diu_ch7301.h"
17 #include "t1040qds_qixis.h"
22 * Note that we need to byte-swap the value before it's written to the AD
23 * register. So even though the registers don't look like they're in the same
24 * bit positions as they are on the MPC8610, the same value is written to the
25 * AD register on the MPC8610 and on the P1022.
27 #define AD_BYTE_F 0x10000000
28 #define AD_ALPHA_C_SHIFT 25
29 #define AD_BLUE_C_SHIFT 23
30 #define AD_GREEN_C_SHIFT 21
31 #define AD_RED_C_SHIFT 19
32 #define AD_PIXEL_S_SHIFT 16
33 #define AD_COMP_3_SHIFT 12
34 #define AD_COMP_2_SHIFT 8
35 #define AD_COMP_1_SHIFT 4
36 #define AD_COMP_0_SHIFT 0
38 void diu_set_pixel_clock(unsigned int pixclock)
40 unsigned long speed_ccb, temp;
43 speed_ccb = get_bus_freq(0);
44 temp = 1000000000 / pixclock;
46 pixval = speed_ccb / temp;
48 /* Program HDMI encoder */
49 /* Switch channel to DIU */
50 select_i2c_ch_pca9547(I2C_MUX_CH_DIU);
52 /* Set dispaly encoder */
53 ret = diu_set_dvi_encoder(temp);
55 puts("Failed to set DVI encoder\n");
59 /* Switch channel to default */
60 select_i2c_ch_pca9547(I2C_MUX_CH_DEFAULT);
62 /* Program pixel clock */
63 out_be32((unsigned *)CONFIG_SYS_FSL_SCFG_PIXCLK_ADDR,
64 ((pixval << PXCK_BITS_START) & PXCK_MASK));
66 out_be32((unsigned *)CONFIG_SYS_FSL_SCFG_PIXCLK_ADDR, PXCKEN_MASK |
67 ((pixval << PXCK_BITS_START) & PXCK_MASK));
70 int platform_diu_init(unsigned int xres, unsigned int yres, const char *port)
75 /*Route I2C4 to DIU system as HSYNC/VSYNC*/
76 sw = QIXIS_READ(brdcfg[5]);
77 QIXIS_WRITE(brdcfg[5],
78 ((sw & ~(BRDCFG5_IMX_MASK)) | (BRDCFG5_IMX_DIU)));
80 /*Configure Display ouput port as HDMI*/
81 sw = QIXIS_READ(brdcfg[15]);
82 QIXIS_WRITE(brdcfg[15],
83 ((sw & ~(BRDCFG15_LCDPD_MASK | BRDCFG15_DIUSEL_MASK))
84 | (BRDCFG15_LCDPD_ENABLED | BRDCFG15_DIUSEL_HDMI)));
86 pixel_format = cpu_to_le32(AD_BYTE_F | (3 << AD_ALPHA_C_SHIFT) |
87 (0 << AD_BLUE_C_SHIFT) | (1 << AD_GREEN_C_SHIFT) |
88 (2 << AD_RED_C_SHIFT) | (8 << AD_COMP_3_SHIFT) |
89 (8 << AD_COMP_2_SHIFT) | (8 << AD_COMP_1_SHIFT) |
90 (8 << AD_COMP_0_SHIFT) | (3 << AD_PIXEL_S_SHIFT));
92 printf("DIU: Switching to monitor @ %ux%u\n", xres, yres);
95 return fsl_diu_init(xres, yres, pixel_format, 0);