video: dw_hdmi: support SoC specific read/write ops

Some IPs like the meson VPU have a specific way to write to dw_hdmi
registers. Make it configurable.

Signed-off-by: Jorge Ramirez-Ortiz <jramirez@baylibre.com>
[added commit description]
Signed-off-by: Maxime Jourdan <mjourdan@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Anatolij Gustschin <agust@denx.de>

diff --git a/drivers/video/dw_hdmi.c b/drivers/video/dw_hdmi.c
index 229bd63c97c8222b3ddbfbbb1985ddca47140a0b..e03f24fa983c2d6fc5f58b08067671e1839b1250 100644 (file)
--- a/drivers/video/dw_hdmi.c
+++ b/drivers/video/dw_hdmi.c
@@ -52,7 +52,7 @@ static const struct tmds_n_cts n_cts_table[] = {
        }
 };
 
-static void hdmi_write(struct dw_hdmi *hdmi, u8 val, int offset)
+static void dw_hdmi_write(struct dw_hdmi *hdmi, u8 val, int offset)
 {
        switch (hdmi->reg_io_width) {
        case 1:
@@ -67,7 +67,7 @@ static void hdmi_write(struct dw_hdmi *hdmi, u8 val, int offset)
        }
 }
 
-static u8 hdmi_read(struct dw_hdmi *hdmi, int offset)
+static u8 dw_hdmi_read(struct dw_hdmi *hdmi, int offset)
 {
        switch (hdmi->reg_io_width) {
        case 1:
@@ -82,6 +82,10 @@ static u8 hdmi_read(struct dw_hdmi *hdmi, int offset)
        return 0;
 }
 
+static u8 (*hdmi_read)(struct dw_hdmi *hdmi, int offset) = dw_hdmi_read;
+static void (*hdmi_write)(struct dw_hdmi *hdmi, u8 val, int offset) =
+                                                                dw_hdmi_write;
+
 static void hdmi_mod(struct dw_hdmi *hdmi, unsigned reg, u8 mask, u8 data)
 {
        u8 val = hdmi_read(hdmi, reg) & ~mask;
@@ -754,6 +758,12 @@ void dw_hdmi_init(struct dw_hdmi *hdmi)
                  HDMI_IH_MUTE_MUTE_WAKEUP_INTERRUPT |
                  HDMI_IH_MUTE_MUTE_ALL_INTERRUPT;
 
+       if (hdmi->write_reg)
+               hdmi_write = hdmi->write_reg;
+
+       if (hdmi->read_reg)
+               hdmi_read = hdmi->read_reg;
+
        hdmi_write(hdmi, ih_mute, HDMI_IH_MUTE);
 
        /* enable i2c master done irq */

diff --git a/include/dw_hdmi.h b/include/dw_hdmi.h
index 23088ec768765cb3dd601ed0a54c0c7b04742468..35edc189c0ee9d7c857ba00445ad8a0afbb64e7e 100644 (file)
--- a/include/dw_hdmi.h
+++ b/include/dw_hdmi.h
@@ -472,6 +472,8 @@ struct dw_hdmi {
        u8 reg_io_width;
 
        int (*phy_set)(struct dw_hdmi *hdmi, uint mpixelclock);
+       void (*write_reg)(struct dw_hdmi *hdmi, u8 val, int offset);
+       u8 (*read_reg)(struct dw_hdmi *hdmi, int offset);
 };
 
 int dw_hdmi_phy_cfg(struct dw_hdmi *hdmi, uint mpixelclock);