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Commit b74f14fd authored by Joonyoung Shim's avatar Joonyoung Shim Committed by Inki Dae
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drm/exynos: initialize VIDCON0 when fimd is disabled 



When the fimd is disabled by fimd_disable(), enabled overlay layers also
are disabled. If clocks for fimd are enabled by fimd_enable() on this
case, it can lead IOMMU page fault. The reason is that VIDCON0_ENVID and
VIDCON0_ENVID_F bits of VIDCON0 register are set still even though fimd
is disabled, so it may continue display output of prior when clocks for
fimd are enabled again.

Signed-off-by: default avatarJoonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: default avatarInki Dae <inki.dae@samsung.com>
parent c329f667

drivers/gpu/drm/exynos/exynos_drm_fimd.c

+2 −0
Original line number Original line Diff line number Diff line
@@ -801,6 +801,8 @@ static void fimd_disable(struct exynos_drm_crtc *crtc) 
	for (i = 0; i < WINDOWS_NR; i++)

	for (i = 0; i < WINDOWS_NR; i++)

		fimd_win_disable(crtc, i);

		fimd_win_disable(crtc, i);





	writel(0, ctx->regs + VIDCON0);



	clk_disable_unprepare(ctx->lcd_clk);

	clk_disable_unprepare(ctx->lcd_clk);

	clk_disable_unprepare(ctx->bus_clk);

	clk_disable_unprepare(ctx->bus_clk);