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platform_kernel-5.15
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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>
This commit is contained in:
Xinliang Liu 2015-11-23 10:43:36 +08:00
parent f819b0d4a9
commit 834480d233
1 changed files with 50 additions and 0 deletions
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50
drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c
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@ -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;
}