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author | Archit Taneja <architt@codeaurora.org> | 2015-11-30 17:47:17 +0530 |
---|---|---|
committer | Rob Clark <robdclark@gmail.com> | 2015-12-14 10:39:59 -0500 |
commit | e6c4c78c10d87a99f298a2455a4aaede5743bb4f (patch) | |
tree | 2ca0933e4373626474320bc287c5fbb9193ed1a5 /drivers/gpu/drm/msm/dsi | |
parent | af6d0423dfe33ca3bb9a0d1f50eb165b087fd88e (diff) | |
download | linux-e6c4c78c10d87a99f298a2455a4aaede5743bb4f.tar.gz linux-e6c4c78c10d87a99f298a2455a4aaede5743bb4f.tar.bz2 linux-e6c4c78c10d87a99f298a2455a4aaede5743bb4f.zip |
drm/msm/dsi: Don't get byte/pixel source clocks from DT
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@kernel.org>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
Diffstat (limited to 'drivers/gpu/drm/msm/dsi')
-rw-r--r-- | drivers/gpu/drm/msm/dsi/dsi_host.c | 15 |
1 files 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 4c49868efcda..aec97c8e5ac4 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: |