Bypasses the mie for fimd by parsing the register and bit offset values
from "mie-bypass" node, if "mie-bypass" node is present in the dts file.
Signed-off-by: Leela Krishna Amudala <l.krishna@xxxxxxxxxxx>
---
drivers/gpu/drm/exynos/exynos_drm_fimd.c | 55 ++++++++++++++++++++++++++++++++
1 file changed, 55 insertions(+)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
index bf0d9ba..f8ad259 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
@@ -118,6 +118,12 @@ static const struct of_device_id fimd_driver_dt_match[] = {
MODULE_DEVICE_TABLE(of, fimd_driver_dt_match);
#endif
+struct mie_bypass {
+ u32 enable_bypass;
+ void __iomem *bypass_reg;
+ u32 bypass_bit_offset;
+};
+
static inline struct fimd_driver_data *drm_fimd_get_driver_data(
struct platform_device *pdev)
{
@@ -133,6 +139,41 @@ static inline struct fimd_driver_data *drm_fimd_get_driver_data(
platform_get_device_id(pdev)->driver_data;
}
+static struct mie_bypass *parse_mie_bypass_for_fimd(struct device *dev,
+ struct device_node *mie_bypass_node)
+{
+ struct mie_bypass *bypass_data;
+ u32 phy_address;
+
+ bypass_data = devm_kzalloc(dev, sizeof(*bypass_data), GFP_KERNEL);
+ if (!bypass_data) {
+ dev_err(dev, "memory allocation for bypass data failed\n");
+ return ERR_PTR(-ENOMEM);
+ }
+ of_property_read_u32(mie_bypass_node, "samsung,mie-bypass-enable",
+ &bypass_data->enable_bypass);
+ of_property_read_u32(mie_bypass_node, "samsung,disp1blk-cfg-reg",
+ &phy_address);
+ of_property_read_u32(mie_bypass_node, "samsung,bypass-bit-offset",
+ &bypass_data->bypass_bit_offset);
+
+ bypass_data->bypass_reg = ioremap(phy_address, SZ_4);
+ if (!bypass_data->bypass_reg) {
+ dev_err(dev, "failed to ioremap phy_address\n");
+ return ERR_PTR(-ENOMEM);
+ }
+ return bypass_data;
+}
+
+static void mie_bypass_for_fimd(struct mie_bypass *bypass_data)
+{
+ u32 reg;
+
+ reg = __raw_readl(bypass_data->bypass_reg);
+ reg |= (1 << bypass_data->bypass_bit_offset);
+ __raw_writel(reg, bypass_data->bypass_reg);
+}
+
static bool fimd_display_is_connected(struct device *dev)
{
DRM_DEBUG_KMS("%s\n", __FILE__);
@@ -906,12 +947,26 @@ static int __devinit fimd_probe(struct platform_device *pdev)
struct exynos_drm_fimd_pdata *pdata;
struct exynos_drm_panel_info *panel;
struct resource *res;
+ struct device_node *mie_bypass_node;
+ struct mie_bypass *bypass_data = NULL;
int win;
int ret = -EINVAL;
DRM_DEBUG_KMS("%s\n", __FILE__);
pdata = pdev->dev.platform_data;
+ if (pdev->dev.of_node) {
+ mie_bypass_node = of_find_node_by_name(pdev->dev.of_node,
+ "mie-bypass");
+ if (mie_bypass_node) {
+ bypass_data = parse_mie_bypass_for_fimd(&pdev->dev,
+ mie_bypass_node);
+ if (IS_ERR(bypass_data))
+ return PTR_ERR(bypass_data);
+ if (bypass_data->enable_bypass)
+ mie_bypass_for_fimd(bypass_data);
+ }
+ }
if (!pdata) {
dev_err(dev, "no platform data specified\n");
return -EINVAL;
--
1.8.0
--
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