We retrieve the byte and pixel source clocks (RCG clocks) in the dsi
driver via DT. These are needed so that we can re-parent these source
clocks if we want to drive it using a different DSI PLL.
We shouldn't get these via DT because they aren't clocks that directly
serve as inputs to the dsi host.
Fortunately, there is a static parent-child link between the
byte_clk_src/pixel_clk_src and byte_clk/pixel_clk clocks. So, we can
retrieve the source clocks via clk_get_parent.
Do this instead of retrieving via DT.
Cc: Rob Herring <robh at kernel.org>
Cc: Stephen Boyd <sboyd at codeaurora.org>
Signed-off-by: Archit Taneja <architt at codeaurora.org>
---
drivers/gpu/drm/msm/dsi/dsi_host.c | 15 ++++++---------
1 file changed, 6 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c
b/drivers/gpu/drm/msm/dsi/dsi_host.c
index 4c49868..aec97c8 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_host.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
@@ -356,20 +356,17 @@ static int dsi_clk_init(struct msm_dsi_host *msm_host)
goto exit;
}
- msm_host->byte_clk_src = devm_clk_get(dev, "byte_clk_src");
- if (IS_ERR(msm_host->byte_clk_src)) {
- ret = PTR_ERR(msm_host->byte_clk_src);
+ msm_host->byte_clk_src = clk_get_parent(msm_host->byte_clk);
+ if (!msm_host->byte_clk_src) {
+ ret = -ENODEV;
pr_err("%s: can't find byte_clk_src. ret=%d\n", __func__, ret);
- msm_host->byte_clk_src = NULL;
goto exit;
}
- msm_host->pixel_clk_src = devm_clk_get(dev, "pixel_clk_src");
- if (IS_ERR(msm_host->pixel_clk_src)) {
- ret = PTR_ERR(msm_host->pixel_clk_src);
+ msm_host->pixel_clk_src = clk_get_parent(msm_host->pixel_clk);
+ if (!msm_host->pixel_clk_src) {
+ ret = -ENODEV;
pr_err("%s: can't find pixel_clk_src. ret=%d\n", __func__, ret);
- msm_host->pixel_clk_src = NULL;
- goto exit;
}
exit:
--
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