ENGR00309838 ARM: imx6sl: gpc: add chip revision check for dispmix

The dispmix feature works without problem since TO1.2.
This patch adds the back-compatibility for older chip.

Signed-off-by: Robby Cai <r63905@freescale.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/arch/arm/mach-imx/gpc.c b/arch/arm/mach-imx/gpc.c
index 18413c637c40..add59a7ad3ab 100644
--- a/arch/arm/mach-imx/gpc.c
+++ b/arch/arm/mach-imx/gpc.c
@@ -92,7 +92,8 @@ static void imx_disp_clk(bool enable)
 
 static void imx_gpc_dispmix_on(void)
 {
-        if (cpu_is_imx6sl()) {
+        if (cpu_is_imx6sl() &&
+                imx_get_soc_revision() >= IMX_CHIP_REVISION_1_2) {
                 imx_disp_clk(true);
 
                 writel_relaxed(0x0, gpc_base + GPC_PGC_DISP_PGCR_OFFSET);
@@ -107,7 +108,8 @@ static void imx_gpc_dispmix_on(void)
 
 static void imx_gpc_dispmix_off(void)
 {
-        if (cpu_is_imx6sl()) {
+        if (cpu_is_imx6sl() &&
+                imx_get_soc_revision() >= IMX_CHIP_REVISION_1_2) {
                 imx_disp_clk(true);
 
                 writel_relaxed(0xFFFFFFFF,