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Commit 30b8913f authored by Andrzej Hajda's avatar Andrzej Hajda Committed by Inki Dae
Browse files

drm/exynos/decon5433: use readl_poll_timeout helpers 



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

Signed-off-by: default avatarAndrzej Hajda <a.hajda@samsung.com>
Signed-off-by: default avatarInki Dae <inki.dae@samsung.com>
parent 7c0059dd

drivers/gpu/drm/exynos/exynos5433_drm_decon.c

+8 −12
Original line number Diff line number Diff line
@@ -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;