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rockchip: video: vop: Add reset support

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In order to ensure that the VOP registers are in correct state,
add missing support for the VOP reset lines found in the device-tree

Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Tested-by: Peter Robinson <pbrobinson@gmail.com>
This commit is contained in:
Arnaud Patard (Rtp) 2021-03-05 11:27:54 +01:00 committed by Anatolij Gustschin
parent cd529f7ad6
commit 9749d2ea29
1 changed files with 47 additions and 3 deletions
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50
drivers/video/rockchip/rk_vop.c
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@ -8,9 +8,11 @@
#include <clk.h>
#include <display.h>
#include <dm.h>
#include <dm/device_compat.h>
#include <edid.h>
#include <log.h>
#include <regmap.h>
#include <reset.h>
#include <syscon.h>
#include <video.h>
#include <asm/global_data.h>
@ -37,14 +39,16 @@ enum vop_pol {
DCLK_INVERT = 3
};
static void rkvop_enable(struct rk3288_vop *regs, ulong fbbase,
static void rkvop_enable(struct udevice *dev, struct rk3288_vop *regs, ulong fbbase,
int fb_bits_per_pixel,
const struct display_timing *edid)
const struct display_timing *edid,
struct reset_ctl *dclk_rst)
{
u32 lb_mode;
u32 rgb_mode;
u32 hactive = edid->hactive.typ;
u32 vactive = edid->vactive.typ;
int ret;
writel(V_ACT_WIDTH(hactive - 1) | V_ACT_HEIGHT(vactive - 1),
&regs->win0_act_info);
@ -92,6 +96,18 @@ static void rkvop_enable(struct rk3288_vop *regs, ulong fbbase,
writel(fbbase, &regs->win0_yrgb_mst);
writel(0x01, &regs->reg_cfg_done); /* enable reg config */
ret = reset_assert(dclk_rst);
if (ret) {
dev_warn(dev, "failed to assert dclk reset (ret=%d)\n", ret);
return;
}
udelay(20);
ret = reset_deassert(dclk_rst);
if (ret)
dev_warn(dev, "failed to deassert dclk reset (ret=%d)\n", ret);
}
static void rkvop_set_pin_polarity(struct udevice *dev,
@ -239,6 +255,7 @@ static int rk_display_init(struct udevice *dev, ulong fbbase, ofnode ep_node)
enum video_log2_bpp l2bpp;
ofnode remote;
const char *compat;
struct reset_ctl dclk_rst;
debug("%s(%s, 0x%lx, %s)\n", __func__,
dev_read_name(dev), fbbase, ofnode_get_name(ep_node));
@ -355,7 +372,14 @@ static int rk_display_init(struct udevice *dev, ulong fbbase, ofnode ep_node)
}
rkvop_mode_set(dev, &timing, vop_id);
rkvop_enable(regs, fbbase, 1 << l2bpp, &timing);
ret = reset_get_by_name(dev, "dclk", &dclk_rst);
if (ret) {
dev_err(dev, "failed to get dclk reset (ret=%d)\n", ret);
return ret;
}
rkvop_enable(dev, regs, fbbase, 1 << l2bpp, &timing, &dclk_rst);
ret = display_enable(disp, 1 << l2bpp, &timing);
if (ret)
@ -392,11 +416,31 @@ int rk_vop_probe(struct udevice *dev)
struct rk_vop_priv *priv = dev_get_priv(dev);
int ret = 0;
ofnode port, node;
struct reset_ctl ahb_rst;
/* Before relocation we don't need to do anything */
if (!(gd->flags & GD_FLG_RELOC))
return 0;
ret = reset_get_by_name(dev, "ahb", &ahb_rst);
if (ret) {
dev_err(dev, "failed to get ahb reset (ret=%d)\n", ret);
return ret;
}
ret = reset_assert(&ahb_rst);
if (ret) {
dev_err(dev, "failed to assert ahb reset (ret=%d)\n", ret);
return ret;
}
udelay(20);
ret = reset_deassert(&ahb_rst);
if (ret) {
dev_err(dev, "failed to deassert ahb reset (ret=%d)\n", ret);
return ret;
}
#if defined(CONFIG_EFI_LOADER)
debug("Adding to EFI map %d @ %lx\n", plat->size, plat->base);
efi_add_memory_map(plat->base, plat->size, EFI_RESERVED_MEMORY_TYPE);