Initialize clocks only after we get the DSI host version. This will allow
us to get clocks using a pre-defined list based on the DSI major/minor
version of the host. This is required since clock requirements of
different major DSI revisions(v2 vs 6g) aren't the same.
Modify dsi_get_version to get the interface clock, and then put it after
it is used.
Signed-off-by: Archit Taneja <architt@xxxxxxxxxxxxxx>
---
drivers/gpu/drm/msm/dsi/dsi_host.c | 32 ++++++++++++++++++++++----------
1 file changed, 22 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
index 7a365df..f787024 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_host.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
@@ -177,21 +177,31 @@ static const struct msm_dsi_cfg_handler *dsi_get_config(
struct msm_dsi_host *msm_host)
{
const struct msm_dsi_cfg_handler *cfg_hnd = NULL;
+ struct device *dev = &msm_host->pdev->dev;
struct regulator *gdsc_reg;
+ struct clk *ahb_clk;
int ret;
u32 major = 0, minor = 0;
- gdsc_reg = regulator_get(&msm_host->pdev->dev, "gdsc");
+ gdsc_reg = regulator_get(dev, "gdsc");
if (IS_ERR(gdsc_reg)) {
pr_err("%s: cannot get gdsc\n", __func__);
goto exit;
}
+
+ ahb_clk = clk_get(dev, "iface_clk");
+ if (IS_ERR(ahb_clk)) {
+ pr_err("%s: cannot get interface clock\n", __func__);
+ goto put_gdsc;
+ }
+
ret = regulator_enable(gdsc_reg);
if (ret) {
pr_err("%s: unable to enable gdsc\n", __func__);
- goto put_gdsc;
+ goto put_clk;
}
- ret = clk_prepare_enable(msm_host->ahb_clk);
+
+ ret = clk_prepare_enable(ahb_clk);
if (ret) {
pr_err("%s: unable to enable ahb_clk\n", __func__);
goto disable_gdsc;
@@ -208,9 +218,11 @@ static const struct msm_dsi_cfg_handler *dsi_get_config(
DBG("%s: Version %x:%x\n", __func__, major, minor);
disable_clks:
- clk_disable_unprepare(msm_host->ahb_clk);
+ clk_disable_unprepare(ahb_clk);
disable_gdsc:
regulator_disable(gdsc_reg);
+put_clk:
+ clk_put(ahb_clk);
put_gdsc:
regulator_put(gdsc_reg);
exit:
@@ -1417,12 +1429,6 @@ int msm_dsi_host_init(struct msm_dsi *msm_dsi)
goto fail;
}
- ret = dsi_clk_init(msm_host);
- if (ret) {
- pr_err("%s: unable to initialize dsi clks\n", __func__);
- goto fail;
- }
-
msm_host->ctrl_base = msm_ioremap(pdev, "dsi_ctrl", "DSI CTRL");
if (IS_ERR(msm_host->ctrl_base)) {
pr_err("%s: unable to map Dsi ctrl base\n", __func__);
@@ -1446,6 +1452,12 @@ int msm_dsi_host_init(struct msm_dsi *msm_dsi)
goto fail;
}
+ ret = dsi_clk_init(msm_host);
+ if (ret) {
+ pr_err("%s: unable to initialize dsi clks\n", __func__);
+ goto fail;
+ }
+
msm_host->rx_buf = devm_kzalloc(&pdev->dev, SZ_4K, GFP_KERNEL);
if (!msm_host->rx_buf) {
pr_err("%s: alloc rx temp buf failed\n", __func__);
--
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hosted by The Linux Foundation
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