diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/rockchip/analogix_dp-rockchip.c | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c index 850edc4d99c8..e81e19a660ad 100644 --- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c +++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c @@ -64,6 +64,7 @@ struct rockchip_dp_device { struct drm_display_mode mode; struct clk *pclk; + struct clk *grfclk; struct regmap *grf; struct reset_control *rst; @@ -160,11 +161,17 @@ static void rockchip_dp_drm_encoder_enable(struct drm_encoder *encoder) dev_dbg(dp->dev, "vop %s output to dp\n", (ret) ? "LIT" : "BIG"); - ret = regmap_write(dp->grf, dp->data->lcdsel_grf_reg, val); - if (ret != 0) { - dev_err(dp->dev, "Could not write to GRF: %d\n", ret); + ret = clk_prepare_enable(dp->grfclk); + if (ret < 0) { + dev_err(dp->dev, "failed to enable grfclk %d\n", ret); return; } + + ret = regmap_write(dp->grf, dp->data->lcdsel_grf_reg, val); + if (ret != 0) + dev_err(dp->dev, "Could not write to GRF: %d\n", ret); + + clk_disable_unprepare(dp->grfclk); } static void rockchip_dp_drm_encoder_nop(struct drm_encoder *encoder) @@ -234,6 +241,16 @@ static int rockchip_dp_init(struct rockchip_dp_device *dp) return PTR_ERR(dp->grf); } + dp->grfclk = devm_clk_get(dev, "grf"); + if (PTR_ERR(dp->grfclk) == -ENOENT) { + dp->grfclk = NULL; + } else if (PTR_ERR(dp->grfclk) == -EPROBE_DEFER) { + return -EPROBE_DEFER; + } else if (IS_ERR(dp->grfclk)) { + dev_err(dev, "failed to get grf clock\n"); + return PTR_ERR(dp->grfclk); + } + dp->pclk = devm_clk_get(dev, "pclk"); if (IS_ERR(dp->pclk)) { dev_err(dev, "failed to get pclk property\n"); |