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Subject[PATCH 3/7] media: atomisp: Add stub for atomisp_mrfld_power
Date
Clang warns:

../drivers/staging/media/atomisp/pci/atomisp_v4l2.c:764:12: warning:
unused function 'atomisp_mrfld_power' [-Wunused-function]
static int atomisp_mrfld_power(struct atomisp_device *isp, bool enable)
^

Use an '#if 0' preprocessor define to hide the broken code, leaving the
FIXME comment intact, and creating an atomisp_mrfld_power stub function
that just returns 0.

Fixes: 95d1f398c4dc ("media: atomisp: keep the ISP powered on when setting it")
Link: https://github.com/ClangBuiltLinux/linux/issues/1036
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
---
drivers/staging/media/atomisp/pci/atomisp_v4l2.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/media/atomisp/pci/atomisp_v4l2.c b/drivers/staging/media/atomisp/pci/atomisp_v4l2.c
index c42999a55303..41aa6018d254 100644
--- a/drivers/staging/media/atomisp/pci/atomisp_v4l2.c
+++ b/drivers/staging/media/atomisp/pci/atomisp_v4l2.c
@@ -736,6 +736,8 @@ static int atomisp_mrfld_pre_power_down(struct atomisp_device *isp)
* WA for DDR DVFS enable/disable
* By default, ISP will force DDR DVFS 1600MHz before disable DVFS
*/
+/* FIXME: at least with ISP2401, the code below causes the driver to break */
+#if 0
static void punit_ddr_dvfs_enable(bool enable)
{
int door_bell = 1 << 8;
@@ -820,20 +822,23 @@ static int atomisp_mrfld_power(struct atomisp_device *isp, bool enable)
dev_err(isp->dev, "IUNIT power-%s timeout.\n", enable ? "on" : "off");
return -EBUSY;
}
+#else
+static int atomisp_mrfld_power(struct atomisp_device *isp, bool enable)
+{
+ return 0;
+}
+#endif

/* Workaround for pmu_nc_set_power_state not ready in MRFLD */
int atomisp_mrfld_power_down(struct atomisp_device *isp)
{
- return 0;
-// FIXME: at least with ISP2401, the code below causes the driver to break
-// return atomisp_mrfld_power(isp, false);
+ return atomisp_mrfld_power(isp, false);
}

/* Workaround for pmu_nc_set_power_state not ready in MRFLD */
int atomisp_mrfld_power_up(struct atomisp_device *isp)
{
return 0;
-// FIXME: at least with ISP2401, the code below causes the driver to break
// return atomisp_mrfld_power(isp, true);
}

--
2.27.0.rc0
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