Add DesignWare dsi host driver for hi6220 SoC.
Signed-off-by: Xinliang Liu xinliang.liu@linaro.org
v3: None. v2: - Remove abtraction layer.
--- 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 7c9423537b71..2837af01e935 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; }