Hi Rahul,
On 02.04.2014 19:13, Rahul Sharma wrote:
From: Rahul Sharma <Rahul.Sharma@xxxxxxxxxxx>
Previous SoCs have hdmi phys which are accessible through
dedicated i2c lines. Newer SoCs have Apb mapped hdmi phys.
Hdmi driver is modified to support apb mapped phys.
Signed-off-by: Rahul Sharma <Rahul.Sharma@xxxxxxxxxxx>
---
drivers/gpu/drm/exynos/exynos_hdmi.c | 142 +++++++++++++++++++++-------------
drivers/gpu/drm/exynos/regs-hdmi.h | 7 ++
2 files changed, 96 insertions(+), 53 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
index 5b2cfe7..5989770 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -33,6 +33,7 @@
#include <linux/regulator/consumer.h>
#include <linux/io.h>
#include <linux/of.h>
+#include <linux/of_address.h>
#include <linux/i2c.h>
#include <linux/of_gpio.h>
#include <linux/hdmi.h>
@@ -68,6 +69,8 @@ enum hdmi_type {
struct hdmi_driver_data {
unsigned int type;
+ const struct hdmiphy_config *phy_confs;
+ unsigned int phy_conf_count;
unsigned int is_apb_phy:1;
};
@@ -196,9 +199,12 @@ struct hdmi_context {
struct hdmi_resources res;
int hpd_gpio;
+ void __iomem *regs_hdmiphy;
struct regmap *pmureg;
enum hdmi_type type;
+ const struct hdmiphy_config *phy_confs;
+ unsigned int phy_conf_count;
};
struct hdmiphy_config {
@@ -206,14 +212,6 @@ struct hdmiphy_config {
u8 conf[32];
};
-struct hdmi_driver_data exynos4212_hdmi_driver_data = {
- .type = HDMI_TYPE14,
-};
-
-struct hdmi_driver_data exynos5_hdmi_driver_data = {
- .type = HDMI_TYPE14,
-};
-
/* list of phy config settings */
static const struct hdmiphy_config hdmiphy_v13_configs[] = {
{
@@ -428,6 +426,21 @@ static const struct hdmiphy_config hdmiphy_v14_configs[] = {
},
};
+
+struct hdmi_driver_data exynos4212_hdmi_driver_data = {
+ .type = HDMI_TYPE14,
+ .phy_confs = hdmiphy_v14_configs,
+ .phy_conf_count = ARRAY_SIZE(hdmiphy_v14_configs),
+ .is_apb_phy = 0,
+};
+
+struct hdmi_driver_data exynos5_hdmi_driver_data = {
+ .type = HDMI_TYPE14,
+ .phy_confs = hdmiphy_v13_configs,
+ .phy_conf_count = ARRAY_SIZE(hdmiphy_v13_configs),
+ .is_apb_phy = 0,
+};
+
static inline u32 hdmi_reg_read(struct hdmi_context *hdata, u32 reg_id)
{
return readl(hdata->regs + reg_id);
@@ -447,6 +460,48 @@ static inline void hdmi_reg_writemask(struct hdmi_context *hdata,
writel(value, hdata->regs + reg_id);
}
+static int hdmiphy_reg_writeb(struct hdmi_context *hdata,
+ u32 reg_offset, u8 value)
+{
+ if (hdata->hdmiphy_port) {
+ u8 buffer[2];
+ int ret;
+
+ buffer[0] = reg_offset;
+ buffer[1] = value;
+
+ ret = i2c_master_send(hdata->hdmiphy_port, buffer, 2);
+ if (ret == 2)
+ return 0;
+ return ret;
+ } else {
+ writeb(value, hdata->regs_hdmiphy + (reg_offset<<2));
+ return 0;
+ }
+}
+
+static int hdmiphy_reg_write_buf(struct hdmi_context *hdata,
+ u32 reg_offset, const u8 *buf, u32 len)
+{
+ if ((reg_offset + len) > 32)
+ return -EINVAL;
+
+ if (hdata->hdmiphy_port) {
+ int ret;
+
+ ret = i2c_master_send(hdata->hdmiphy_port, buf, len);
reg_offset doesn't seem to be used in I2C code path in any way. Are you
sure this is correct?
+ if (ret == len)
+ return 0;
+ return ret;
+ } else {
+ int i;
+ for (i = 0; i < len; i++)
+ writeb(buf[i], hdata->regs_hdmiphy +
+ ((reg_offset + i)<<2));
+ return 0;
+ }
+}
I wonder if those functions couldn't be abstracted as two callbacks in
hdmi_driver_data struct to eliminate such if clauses as above.
--
Best regards,
Tomasz
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