Linux core provide helpers for polling with timeout, lets use them.
Signed-off-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
---
drivers/gpu/drm/exynos/exynos5433_drm_decon.c | 20 ++++++++------------
1 file changed, 8 insertions(+), 12 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
index 5792ca88..237b4c9 100644
--- a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
+++ b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
@@ -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;
--
2.7.4
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