DRM: Armada: add support for drm tda19988 driver

Add support for TDA998x output via the slave driver in the kernel.

Reviewed-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 51 insertions, 0 deletions

diff --git a/drivers/gpu/drm/armada/Kconfig b/drivers/gpu/drm/armada/Kconfig
index c7a0a944acfe..87e62dd4431d 100644
--- a/drivers/gpu/drm/armada/Kconfig
+++ b/drivers/gpu/drm/armada/Kconfig
@@ -13,3 +13,12 @@ config DRM_ARMADA
           This driver provides no built-in acceleration; acceleration is
           performed by other IP found on the SoC.  This driver provides
           kernel mode setting and buffer management to userspace.
+
+config DRM_ARMADA_TDA1998X
+        bool "Support TDA1998X HDMI output"
+        depends on DRM_ARMADA != n
+        depends on I2C && DRM_I2C_NXP_TDA998X = y
+        default y
+        help
+          Support the TDA1998x HDMI output device found on the Solid-Run
+          CuBox.
diff --git a/drivers/gpu/drm/armada/armada_drv.c b/drivers/gpu/drm/armada/armada_drv.c
index 7bfab9a286ae..7aede900a221 100644
--- a/drivers/gpu/drm/armada/armada_drv.c
+++ b/drivers/gpu/drm/armada/armada_drv.c
@@ -16,6 +16,42 @@
 #include <drm/armada_drm.h>
 #include "armada_ioctlP.h"
 
+#ifdef CONFIG_DRM_ARMADA_TDA1998X
+#include <drm/i2c/tda998x.h>
+#include "armada_slave.h"
+
+static struct tda998x_encoder_params params = {
+        /* With 0x24, there is no translation between vp_out and int_vp
+        FB      LCD out Pins    VIP     Int Vp
+        R:23:16 R:7:0   VPC7:0  7:0     7:0[R]
+        G:15:8  G:15:8  VPB7:0  23:16   23:16[G]
+        B:7:0   B:23:16 VPA7:0  15:8    15:8[B]
+        */
+        .swap_a = 2,
+        .swap_b = 3,
+        .swap_c = 4,
+        .swap_d = 5,
+        .swap_e = 0,
+        .swap_f = 1,
+        .audio_cfg = BIT(2),
+        .audio_frame[1] = 1,
+        .audio_format = AFMT_SPDIF,
+        .audio_sample_rate = 44100,
+};
+
+static const struct armada_drm_slave_config tda19988_config = {
+        .i2c_adapter_id = 0,
+        .crtcs = 1 << 0, /* Only LCD0 at the moment */
+        .polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT,
+        .interlace_allowed = true,
+        .info = {
+                .type = "tda998x",
+                .addr = 0x70,
+                .platform_data = &params,
+        },
+};
+#endif
+
 static void armada_drm_unref_work(struct work_struct *work)
 {
         struct armada_private *priv =
@@ -134,6 +170,12 @@ static int armada_drm_load(struct drm_device *dev, unsigned long flags)
                         goto err_kms;
         }
 
+#ifdef CONFIG_DRM_ARMADA_TDA1998X
+        ret = armada_drm_connector_slave_create(dev, &tda19988_config);
+        if (ret)
+                goto err_kms;
+#endif
+
         ret = drm_vblank_init(dev, n);
         if (ret)
                 goto err_kms;