Revert "drm/tegra: rgb: Hacks for S6E63M0"

This reverts commit fcae068.

drivers/gpu/drm/tegra/rgb.c

@@ -34,7 +34,7 @@ struct reg_entry {
 	unsigned long value;
 };
 
-static struct reg_entry rgb_enable[] = {
+static const struct reg_entry rgb_enable[] = {
 	{ DC_COM_PIN_OUTPUT_ENABLE(0),   0x00000000 },
 	{ DC_COM_PIN_OUTPUT_ENABLE(1),   0x00000000 },
 	{ DC_COM_PIN_OUTPUT_ENABLE(2),   0x00000000 },
@@ -103,15 +103,6 @@ static void tegra_rgb_encoder_enable(struct drm_encoder *encoder)
 	struct tegra_rgb *rgb = to_rgb(output);
 	u32 value;
 
-	/*
-	 * Temporal hack for S6E63M0
-	 *
-	 * Pins DATA_ENABLE, H_SYNC, V_SYNC, PIXEL_CLOCK are low polarity,
-	 * set this in the registers to make the panel working.
-	 */
-	if (of_machine_is_compatible("samsung,i927"))
-		rgb_enable[7].value = 0x00000100;
-
 	tegra_dc_write_regs(rgb->dc, rgb_enable, ARRAY_SIZE(rgb_enable));
 
 	value = DE_SELECT_ACTIVE | DE_CONTROL_NORMAL;
@@ -121,10 +112,6 @@ static void tegra_rgb_encoder_enable(struct drm_encoder *encoder)
 	value = tegra_dc_readl(rgb->dc, DC_COM_PIN_OUTPUT_POLARITY(1));
 	value &= ~LVS_OUTPUT_POLARITY_LOW;
 	value &= ~LHS_OUTPUT_POLARITY_LOW;
-	if (of_machine_is_compatible("samsung,i927")) {
-		value |= LVS_OUTPUT_POLARITY_LOW;
-		value |= LHS_OUTPUT_POLARITY_LOW;
-	}
 	tegra_dc_writel(rgb->dc, value, DC_COM_PIN_OUTPUT_POLARITY(1));
 
 	/* XXX: parameterize? */