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@@ -251,6 +251,45 @@ void exynos_fimd_window_off(unsigned int win_id)
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writel(cfg, &fimd_ctrl->winshmap);
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}
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+#ifdef CONFIG_OF_CONTROL
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+/*
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+* The reset value for FIMD SYSMMU register MMU_CTRL is 3
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+* on Exynos5420 and newer versions.
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+* This means FIMD SYSMMU is on by default on Exynos5420
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+* and newer versions.
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+* Since in u-boot we don't use SYSMMU, we should disable
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+* those FIMD SYSMMU.
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+* Note that there are 2 SYSMMU for FIMD: m0 and m1.
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+* m0 handles windows 0 and 4, and m1 handles windows 1, 2 and 3.
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+* We disable both of them here.
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+*/
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+void exynos_fimd_disable_sysmmu(void)
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+{
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+ u32 *sysmmufimd;
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+ unsigned int node;
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+ int node_list[2];
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+ int count;
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+ int i;
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+
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+ count = fdtdec_find_aliases_for_id(gd->fdt_blob, "fimd",
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+ COMPAT_SAMSUNG_EXYNOS_SYSMMU, node_list, 2);
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+ for (i = 0; i < count; i++) {
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+ node = node_list[i];
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+ if (node <= 0) {
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+ debug("Can't get device node for fimd sysmmu\n");
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+ return;
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+ }
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+
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+ sysmmufimd = (u32 *)fdtdec_get_addr(gd->fdt_blob, node, "reg");
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+ if (!sysmmufimd) {
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+ debug("Can't get base address for sysmmu fimdm0");
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+ return;
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+ }
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+
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+ writel(0x0, sysmmufimd);
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+ }
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+}
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+#endif
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void exynos_fimd_lcd_init(vidinfo_t *vid)
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{
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@@ -268,6 +307,10 @@ void exynos_fimd_lcd_init(vidinfo_t *vid)
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node, "reg");
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if (fimd_ctrl == NULL)
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debug("Can't get the FIMD base address\n");
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+
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+ if (fdtdec_get_bool(gd->fdt_blob, node, "samsung,disable-sysmmu"))
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+ exynos_fimd_disable_sysmmu();
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+
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#else
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fimd_ctrl = (struct exynos_fb *)samsung_get_base_fimd();
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#endif
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