drm/exynos/decon5433: use readl_poll_timeout helpers (30b8913f) · Commits · 戴 / test

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;