diff options
| -rw-r--r-- | drivers/gpu/drm/stm/dw_mipi_dsi-stm.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c b/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c index d8e4a146b320..01db020c8953 100644 --- a/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c +++ b/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c @@ -227,7 +227,6 @@ dw_mipi_dsi_get_lane_mbps(void *priv_data, const struct drm_display_mode *mode, u32 val; /* Update lane capabilities according to hw version */ - dsi->hw_version = dsi_read(dsi, DSI_VERSION) & VERSION; dsi->lane_min_kbps = LANE_MIN_KBPS; dsi->lane_max_kbps = LANE_MAX_KBPS; if (dsi->hw_version == HWVER_131) { @@ -306,6 +305,7 @@ static int dw_mipi_dsi_stm_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct dw_mipi_dsi_stm *dsi; + struct clk *pclk; struct resource *res; int ret; @@ -348,6 +348,28 @@ static int dw_mipi_dsi_stm_probe(struct platform_device *pdev) goto err_clk_get; } + pclk = devm_clk_get(dev, "pclk"); + if (IS_ERR(pclk)) { + ret = PTR_ERR(pclk); + DRM_ERROR("Unable to get peripheral clock: %d\n", ret); + goto err_dsi_probe; + } + + ret = clk_prepare_enable(pclk); + if (ret) { + DRM_ERROR("%s: Failed to enable peripheral clk\n", __func__); + goto err_dsi_probe; + } + + dsi->hw_version = dsi_read(dsi, DSI_VERSION) & VERSION; + clk_disable_unprepare(pclk); + + if (dsi->hw_version != HWVER_130 && dsi->hw_version != HWVER_131) { + ret = -ENODEV; + DRM_ERROR("bad dsi hardware version\n"); + goto err_dsi_probe; + } + dw_mipi_dsi_stm_plat_data.base = dsi->base; dw_mipi_dsi_stm_plat_data.priv_data = dsi; |