drm/hisilicon: Add designware dsi host driver

Add DesignWare dsi host driver for hi6220 SoC.

v8: None.
v7: None.
v6: None.
v5: None.
v4: None.
v3: None.
v2:
- Remove abtraction layer.

Signed-off-by: Xinliang Liu <xinliang.liu@linaro.org>
Signed-off-by: Xinwei Kong <kong.kongxinwei@hisilicon.com>
Reviewed-by: Archit Taneja <architt@codeaurora.org>

diff --git a/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c b/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c
index 1a930b7..ea77118 100644 (file)
--- a/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c
+++ b/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c
@@ -80,6 +80,7 @@ struct dsi_hw_ctx {
 
 struct dw_dsi {
        struct drm_encoder encoder;
+       struct mipi_dsi_host host;
        struct drm_display_mode cur_mode;
        struct dsi_hw_ctx *ctx;
        struct mipi_phy_params phy;
@@ -654,6 +655,51 @@ static int dw_drm_encoder_init(struct device *dev,
        return 0;
 }
 
+static int dsi_host_attach(struct mipi_dsi_host *host,
+                          struct mipi_dsi_device *mdsi)
+{
+       struct dw_dsi *dsi = host_to_dsi(host);
+
+       if (mdsi->lanes < 1 || mdsi->lanes > 4) {
+               DRM_ERROR("dsi device params invalid\n");
+               return -EINVAL;
+       }
+
+       dsi->lanes = mdsi->lanes;
+       dsi->format = mdsi->format;
+       dsi->mode_flags = mdsi->mode_flags;
+
+       return 0;
+}
+
+static int dsi_host_detach(struct mipi_dsi_host *host,
+                          struct mipi_dsi_device *mdsi)
+{
+       /* do nothing */
+       return 0;
+}
+
+static const struct mipi_dsi_host_ops dsi_host_ops = {
+       .attach = dsi_host_attach,
+       .detach = dsi_host_detach,
+};
+
+static int dsi_host_init(struct device *dev, struct dw_dsi *dsi)
+{
+       struct mipi_dsi_host *host = &dsi->host;
+       int ret;
+
+       host->dev = dev;
+       host->ops = &dsi_host_ops;
+       ret = mipi_dsi_host_register(host);
+       if (ret) {
+               DRM_ERROR("failed to register dsi host\n");
+               return ret;
+       }
+
+       return 0;
+}
+
 static int dsi_bind(struct device *dev, struct device *master, void *data)
 {
        struct dsi_data *ddata = dev_get_drvdata(dev);
@@ -665,6 +711,10 @@ static int dsi_bind(struct device *dev, struct device *master, void *data)
        if (ret)
                return ret;
 
+       ret = dsi_host_init(dev, dsi);
+       if (ret)
+               return ret;
+
        return 0;
 }