| Message ID | 20210217221134.2606-4-andrey.konovalov@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | media: qcom: camss: V4L2_CID_PIXEL_RATE/LINK_FREQ fixes | expand |
Hi Andrey, On Thu, Feb 18, 2021 at 01:11:34AM +0300, Andrey Konovalov wrote: > From: Vladimir Lypak <junak.pub@gmail.com> > > Because of u32 type being used to store pixel clock rate, expression used > to calculate pipeline clocks (pixel_clock * bpp) produces wrong value due > to integer overflow. This patch changes data type used to store, pass and > retrieve pixel_clock from u32 to u64 to make this mistake less likely to > be repeated in the future. I see this might be the cause for the overflow tmp = pixel_clock[j] * bpp / 64; and anyway PIXEL_RATE is an u64 control, so this seems correct Reviewed-by: Jacopo Mondi <jacopo@jmondi.org> Thanks j > > Signed-off-by: Vladimir Lypak <junak.pub@gmail.com> > Acked-by: Robert Foss <robert.foss@linaro.org> > Signed-off-by: Andrey Konovalov <andrey.konovalov@linaro.org> > --- > drivers/media/platform/qcom/camss/camss-vfe.c | 4 ++-- > drivers/media/platform/qcom/camss/camss.c | 2 +- > drivers/media/platform/qcom/camss/camss.h | 2 +- > 3 files changed, 4 insertions(+), 4 deletions(-) > > diff --git a/drivers/media/platform/qcom/camss/camss-vfe.c b/drivers/media/platform/qcom/camss/camss-vfe.c > index fae2b513b2f9..b2c95b46ce66 100644 > --- a/drivers/media/platform/qcom/camss/camss-vfe.c > +++ b/drivers/media/platform/qcom/camss/camss-vfe.c > @@ -1112,7 +1112,7 @@ static inline void vfe_isr_halt_ack(struct vfe_device *vfe) > static int vfe_set_clock_rates(struct vfe_device *vfe) > { > struct device *dev = vfe->camss->dev; > - u32 pixel_clock[MSM_VFE_LINE_NUM]; > + u64 pixel_clock[MSM_VFE_LINE_NUM]; > int i, j; > int ret; > > @@ -1194,7 +1194,7 @@ static int vfe_set_clock_rates(struct vfe_device *vfe) > */ > static int vfe_check_clock_rates(struct vfe_device *vfe) > { > - u32 pixel_clock[MSM_VFE_LINE_NUM]; > + u64 pixel_clock[MSM_VFE_LINE_NUM]; > int i, j; > int ret; > > diff --git a/drivers/media/platform/qcom/camss/camss.c b/drivers/media/platform/qcom/camss/camss.c > index eb8fb8c34acd..d82bbc2213a6 100644 > --- a/drivers/media/platform/qcom/camss/camss.c > +++ b/drivers/media/platform/qcom/camss/camss.c > @@ -578,7 +578,7 @@ s64 camss_get_link_freq(struct media_entity *entity, unsigned int bpp, > * > * Return 0 on success or a negative error code otherwise > */ > -int camss_get_pixel_clock(struct media_entity *entity, u32 *pixel_clock) > +int camss_get_pixel_clock(struct media_entity *entity, u64 *pixel_clock) > { > struct media_entity *sensor; > struct v4l2_subdev *subdev; > diff --git a/drivers/media/platform/qcom/camss/camss.h b/drivers/media/platform/qcom/camss/camss.h > index 86cdc25189eb..e29466d07ad2 100644 > --- a/drivers/media/platform/qcom/camss/camss.h > +++ b/drivers/media/platform/qcom/camss/camss.h > @@ -110,7 +110,7 @@ void camss_disable_clocks(int nclocks, struct camss_clock *clock); > struct media_entity *camss_find_sensor(struct media_entity *entity); > s64 camss_get_link_freq(struct media_entity *entity, unsigned int bpp, > unsigned int lanes); > -int camss_get_pixel_clock(struct media_entity *entity, u32 *pixel_clock); > +int camss_get_pixel_clock(struct media_entity *entity, u64 *pixel_clock); > int camss_pm_domain_on(struct camss *camss, int id); > void camss_pm_domain_off(struct camss *camss, int id); > void camss_delete(struct camss *camss); > -- > 2.17.1 >
diff --git a/drivers/media/platform/qcom/camss/camss-vfe.c b/drivers/media/platform/qcom/camss/camss-vfe.c index fae2b513b2f9..b2c95b46ce66 100644 --- a/drivers/media/platform/qcom/camss/camss-vfe.c +++ b/drivers/media/platform/qcom/camss/camss-vfe.c @@ -1112,7 +1112,7 @@ static inline void vfe_isr_halt_ack(struct vfe_device *vfe) static int vfe_set_clock_rates(struct vfe_device *vfe) { struct device *dev = vfe->camss->dev; - u32 pixel_clock[MSM_VFE_LINE_NUM]; + u64 pixel_clock[MSM_VFE_LINE_NUM]; int i, j; int ret; @@ -1194,7 +1194,7 @@ static int vfe_set_clock_rates(struct vfe_device *vfe) */ static int vfe_check_clock_rates(struct vfe_device *vfe) { - u32 pixel_clock[MSM_VFE_LINE_NUM]; + u64 pixel_clock[MSM_VFE_LINE_NUM]; int i, j; int ret; diff --git a/drivers/media/platform/qcom/camss/camss.c b/drivers/media/platform/qcom/camss/camss.c index eb8fb8c34acd..d82bbc2213a6 100644 --- a/drivers/media/platform/qcom/camss/camss.c +++ b/drivers/media/platform/qcom/camss/camss.c @@ -578,7 +578,7 @@ s64 camss_get_link_freq(struct media_entity *entity, unsigned int bpp, * * Return 0 on success or a negative error code otherwise */ -int camss_get_pixel_clock(struct media_entity *entity, u32 *pixel_clock) +int camss_get_pixel_clock(struct media_entity *entity, u64 *pixel_clock) { struct media_entity *sensor; struct v4l2_subdev *subdev; diff --git a/drivers/media/platform/qcom/camss/camss.h b/drivers/media/platform/qcom/camss/camss.h index 86cdc25189eb..e29466d07ad2 100644 --- a/drivers/media/platform/qcom/camss/camss.h +++ b/drivers/media/platform/qcom/camss/camss.h @@ -110,7 +110,7 @@ void camss_disable_clocks(int nclocks, struct camss_clock *clock); struct media_entity *camss_find_sensor(struct media_entity *entity); s64 camss_get_link_freq(struct media_entity *entity, unsigned int bpp, unsigned int lanes); -int camss_get_pixel_clock(struct media_entity *entity, u32 *pixel_clock); +int camss_get_pixel_clock(struct media_entity *entity, u64 *pixel_clock); int camss_pm_domain_on(struct camss *camss, int id); void camss_pm_domain_off(struct camss *camss, int id); void camss_delete(struct camss *camss);