*
* Copyright (C) 2011-2013 Marek Vasut <marex@denx.de>
*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <malloc.h>
#include <video_fb.h>
+#include <mxcfb.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/clock.h>
#include <asm/errno.h>
#include <asm/io.h>
+#include <asm/imx-common/dma.h>
+
#include "videomodes.h"
#define PS2KHZ(ps) (1000000000UL / (ps))
+DECLARE_GLOBAL_DATA_PTR;
+
static GraphicDevice panel;
+struct mxs_dma_desc desc;
+
+/**
+ * mxsfb_system_setup() - Fine-tune LCDIF configuration
+ *
+ * This function is used to adjust the LCDIF configuration. This is usually
+ * needed when driving the controller in System-Mode to operate an 8080 or
+ * 6800 connected SmartLCD.
+ */
+__weak void mxsfb_system_setup(void)
+{
+}
/*
* DENX M28EVK:
* setenv videomode
* video=ctfb:x:800,y:480,depth:18,mode:0,pclk:30066,
* le:0,ri:256,up:0,lo:45,hs:1,vs:1,sync:100663296,vmode:0
+ *
+ * Freescale mx23evk/mx28evk with a Seiko 4.3'' WVGA panel:
+ * setenv videomode
+ * video=ctfb:x:800,y:480,depth:24,mode:0,pclk:29851,
+ * le:89,ri:164,up:23,lo:10,hs:10,vs:10,sync:0,vmode:0
*/
static void mxs_lcd_init(GraphicDevice *panel,
struct ctfb_res_modes *mode, int bpp)
{
struct mxs_lcdif_regs *regs = (struct mxs_lcdif_regs *)MXS_LCDIF_BASE;
- uint32_t word_len = 0, bus_width = 0;
- uint8_t valid_data = 0;
+ uint32_t word_len, bus_width;
+ uint8_t valid_data;
+ uint32_t vctrl0 = 0;
/* Kick in the LCDIF clock */
mxs_set_lcdclk(PS2KHZ(mode->pixclock));
bus_width = LCDIF_CTRL_LCD_DATABUS_WIDTH_8BIT;
valid_data = 0xf;
break;
+ default:
+ printf("Invalid color depth: %d\n", bpp);
+ hang();
}
writel(bus_width | word_len | LCDIF_CTRL_DOTCLK_MODE |
writel(valid_data << LCDIF_CTRL1_BYTE_PACKING_FORMAT_OFFSET,
®s->hw_lcdif_ctrl1);
+
+ mxsfb_system_setup();
+
writel((mode->yres << LCDIF_TRANSFER_COUNT_V_COUNT_OFFSET) | mode->xres,
®s->hw_lcdif_transfer_count);
- writel(LCDIF_VDCTRL0_ENABLE_PRESENT | LCDIF_VDCTRL0_ENABLE_POL |
+ if (!(mode->sync & FB_SYNC_OE_LOW_ACT))
+ vctrl0 |= LCDIF_VDCTRL0_ENABLE_POL;
+
+ if (mode->sync & FB_SYNC_CLK_LAT_FALL)
+ vctrl0 |= LCDIF_VDCTRL0_DOTCLK_POL;
+
+ if (mode->sync & FB_SYNC_HOR_HIGH_ACT)
+ vctrl0 |= LCDIF_VDCTRL0_HSYNC_POL;
+
+ if (mode->sync & FB_SYNC_VERT_HIGH_ACT)
+ vctrl0 |= LCDIF_VDCTRL0_VSYNC_POL;
+
+ writel(vctrl0 | LCDIF_VDCTRL0_ENABLE_PRESENT |
LCDIF_VDCTRL0_VSYNC_PERIOD_UNIT |
LCDIF_VDCTRL0_VSYNC_PULSE_WIDTH_UNIT |
mode->vsync_len, ®s->hw_lcdif_vdctrl0);
/* Flush FIFO first */
writel(LCDIF_CTRL1_FIFO_CLEAR, ®s->hw_lcdif_ctrl1_set);
+#ifndef CONFIG_VIDEO_MXS_MODE_SYSTEM
/* Sync signals ON */
setbits_le32(®s->hw_lcdif_vdctrl4, LCDIF_VDCTRL4_SYNC_SIGNALS_ON);
+#endif
/* FIFO cleared */
writel(LCDIF_CTRL1_FIFO_CLEAR, ®s->hw_lcdif_ctrl1_clr);
{
int bpp = -1;
char *penv;
- void *fb;
struct ctfb_res_modes mode;
puts("Video: ");
/* Suck display configuration from "videomode" variable */
penv = getenv("videomode");
if (!penv) {
- printf("MXSFB: 'videomode' variable not set!");
+ puts("MXSFB: 'videomode' variable not set!\n");
return NULL;
}
panel.memSize = mode.xres * mode.yres * panel.gdfBytesPP;
- /* Allocate framebuffer */
- fb = malloc(panel.memSize);
- if (!fb) {
- printf("MXSFB: Error allocating framebuffer!\n");
- return NULL;
- }
-
- /* Wipe framebuffer */
- memset(fb, 0, panel.memSize);
-
- panel.frameAdrs = (u32)fb;
+ panel.frameAdrs = gd->fb_base;
printf("%s\n", panel.modeIdent);
/* Start framebuffer */
mxs_lcd_init(&panel, &mode, bpp);
+#ifdef CONFIG_VIDEO_MXS_MODE_SYSTEM
+ /*
+ * If the LCD runs in system mode, the LCD refresh has to be triggered
+ * manually by setting the RUN bit in HW_LCDIF_CTRL register. To avoid
+ * having to set this bit manually after every single change in the
+ * framebuffer memory, we set up specially crafted circular DMA, which
+ * sets the RUN bit, then waits until it gets cleared and repeats this
+ * infinitelly. This way, we get smooth continuous updates of the LCD.
+ */
+ struct mxs_lcdif_regs *regs = (struct mxs_lcdif_regs *)MXS_LCDIF_BASE;
+
+ memset(&desc, 0, sizeof(struct mxs_dma_desc));
+ desc.address = (dma_addr_t)&desc;
+ desc.cmd.data = MXS_DMA_DESC_COMMAND_NO_DMAXFER | MXS_DMA_DESC_CHAIN |
+ MXS_DMA_DESC_WAIT4END |
+ (1 << MXS_DMA_DESC_PIO_WORDS_OFFSET);
+ desc.cmd.pio_words[0] = readl(®s->hw_lcdif_ctrl) | LCDIF_CTRL_RUN;
+ desc.cmd.next = (uint32_t)&desc.cmd;
+
+ /* Execute the DMA chain. */
+ mxs_dma_circ_start(MXS_DMA_CHANNEL_AHB_APBH_LCDIF, &desc);
+#endif
+
return (void *)&panel;
}
projects / karo-tx-uboot.git / blobdiff