Re: [PATCH v6 08/11] drm/hisilicon: Add designware dsi host driver

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On 2/26/2016 2:10 PM, Xinliang Liu wrote:
Add DesignWare dsi host driver for hi6220 SoC.

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

Reviewed-by: Archit Taneja <architt@xxxxxxxxxxxxxx>


Signed-off-by: Xinliang Liu <xinliang.liu@xxxxxxxxxx>
---
  drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c | 50 ++++++++++++++++++++++++++++
  1 file changed, 50 insertions(+)

diff --git a/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c b/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c
index 8329148cc89d..f15798b61451 100644
--- a/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c
+++ b/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c
@@ -79,6 +79,7 @@ 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;
@@ -642,6 +643,51 @@ 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);
@@ -653,6 +699,10 @@ 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;
  }



--
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a Linux Foundation Collaborative Project
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