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drm/exynos/decon5433: use readl_poll_timeout helpers 

Linux core provide helpers for polling with timeout, lets use them.

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
This commit is contained in:
Andrzej Hajda 2017-08-24 15:33:50 +02:00 committed by Inki Dae
parent 7c0059dd83
commit 30b8913fd3
1 changed files with 8 additions and 12 deletions
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20
drivers/gpu/drm/exynos/exynos5433_drm_decon.c
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@ -13,6 +13,7 @@
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/component.h>
#include <linux/iopoll.h>
#include <linux/mfd/syscon.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
@ -407,24 +408,19 @@ static void decon_atomic_flush(struct exynos_drm_crtc *crtc)
static void decon_swreset(struct decon_context *ctx)
{
unsigned int tries;
unsigned long flags;
u32 val;
int ret;
writel(0, ctx->addr + DECON_VIDCON0);
for (tries = 2000; tries; --tries) {
if (~readl(ctx->addr + DECON_VIDCON0) & VIDCON0_STOP_STATUS)
break;
udelay(10);
}
readl_poll_timeout(ctx->addr + DECON_VIDCON0, val,
~val & VIDCON0_STOP_STATUS, 12, 20000);
writel(VIDCON0_SWRESET, ctx->addr + DECON_VIDCON0);
for (tries = 2000; tries; --tries) {
if (~readl(ctx->addr + DECON_VIDCON0) & VIDCON0_SWRESET)
break;
udelay(10);
}
ret = readl_poll_timeout(ctx->addr + DECON_VIDCON0, val,
~val & VIDCON0_SWRESET, 12, 20000);
WARN(tries == 0, "failed to software reset DECON\n");
WARN(ret < 0, "failed to software reset DECON\n");
spin_lock_irqsave(&ctx->vblank_lock, flags);
ctx->frame_id = 0;