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video: mxsfb: add support for DM CLK

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Allow using DM CLK instead of mxs_set_lcdclk() so we can avoid to
implement a special function to set lcd clock on i.MXRT.

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Reviewed-by: Anatolij Gustschin <agust@denx.de>
This commit is contained in:
Giulio Benetti 2020-04-08 17:10:13 +02:00 committed by Stefano Babic
parent 92a68368c0
commit ceb4ffc74d
1 changed files with 25 additions and 5 deletions
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30
drivers/video/mxsfb.c
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@ -5,6 +5,7 @@
* Copyright (C) 2011-2013 Marek Vasut <marex@denx.de>
*/
#include <common.h>
#include <clk.h>
#include <dm.h>
#include <env.h>
#include <dm/device_compat.h>
@ -52,14 +53,32 @@ __weak void mxsfb_system_setup(void)
* le:89,ri:164,up:23,lo:10,hs:10,vs:10,sync:0,vmode:0
*/
static void mxs_lcd_init(u32 fb_addr, struct ctfb_res_modes *mode, int bpp)
static void mxs_lcd_init(struct udevice *dev, u32 fb_addr,
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;
#if CONFIG_IS_ENABLED(CLK)
struct clk per_clk;
int ret;
ret = clk_get_by_name(dev, "per", &per_clk);
if (ret) {
dev_err(dev, "Failed to get mxs clk: %d\n", ret);
return;
}
ret = clk_set_rate(&per_clk, PS2KHZ(mode->pixclock) * 1000);
if (ret < 0) {
dev_err(dev, "Failed to set mxs clk: %d\n", ret);
return;
}
#else
/* Kick in the LCDIF clock */
mxs_set_lcdclk(MXS_LCDIF_BASE, PS2KHZ(mode->pixclock));
#endif
/* Restart the LCDIF block */
mxs_reset_block(&regs->hw_lcdif_ctrl_reg);
@ -135,10 +154,11 @@ static void mxs_lcd_init(u32 fb_addr, struct ctfb_res_modes *mode, int bpp)
writel(LCDIF_CTRL_RUN, &regs->hw_lcdif_ctrl_set);
}
static int mxs_probe_common(struct ctfb_res_modes *mode, int bpp, u32 fb)
static int mxs_probe_common(struct udevice *dev, struct ctfb_res_modes *mode,
int bpp, u32 fb)
{
/* Start framebuffer */
mxs_lcd_init(fb, mode, bpp);
mxs_lcd_init(dev, fb, mode, bpp);
#ifdef CONFIG_VIDEO_MXS_MODE_SYSTEM
/*
@ -260,7 +280,7 @@ void *video_hw_init(void)
printf("%s\n", panel.modeIdent);
ret = mxs_probe_common(&mode, bpp, (u32)fb);
ret = mxs_probe_common(NULL, &mode, bpp, (u32)fb);
if (ret)
goto dealloc_fb;
@ -337,7 +357,7 @@ static int mxs_video_probe(struct udevice *dev)
mode.vsync_len = timings.vsync_len.typ;
mode.pixclock = HZ2PS(timings.pixelclock.typ);
ret = mxs_probe_common(&mode, bpp, plat->base);
ret = mxs_probe_common(dev, &mode, bpp, plat->base);
if (ret)
return ret;