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drm/sti: do not set gdp pixel clock rate if mode is not set
author
Vincent Abriou
<vincent.abriou@st.com>
Thu, 2 Feb 2017 08:49:02 +0000
(09:49 +0100)
committer
Vincent Abriou
<vincent.abriou@st.com>
Fri, 10 Feb 2017 08:34:39 +0000
(09:34 +0100)
Fix a division by 0 case : in some cases, when the GDP plane is being
disabled atomic_check() is called with "mode->clock = 0".
In that case, do not set parent and pixel clock rate.
Signed-off-by: Vincent Abriou <vincent.abriou@st.com>
drivers/gpu/drm/sti/sti_gdp.c
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diff --git
a/drivers/gpu/drm/sti/sti_gdp.c
b/drivers/gpu/drm/sti/sti_gdp.c
index
7255234
..
7f6d079
100644
(file)
--- a/
drivers/gpu/drm/sti/sti_gdp.c
+++ b/
drivers/gpu/drm/sti/sti_gdp.c
@@
-648,7
+648,7
@@
static int sti_gdp_atomic_check(struct drm_plane *drm_plane,
}
/* Set gdp clock */
- if (gdp->clk_pix) {
+ if (
mode->clock &&
gdp->clk_pix) {
struct clk *clkp;
int rate = mode->clock * 1000;
int res;