diff options
| author | Jyri Sarha <jsarha@ti.com> | 2016-09-05 20:39:32 +0300 |
|---|---|---|
| committer | Jyri Sarha <jsarha@ti.com> | 2016-09-07 15:54:40 +0300 |
| commit | a6b7ebaadb5c8d869908e803e5616922a5096253 (patch) | |
| tree | 7783e40634979d49117e430435a089c0c00019b1 /drivers/gpu/drm/tilcdc/tilcdc_drv.c | |
| parent | c56653855250ca6072d6e0ad7fe537c1a6628c70 (diff) | |
| download | linux-a6b7ebaadb5c8d869908e803e5616922a5096253.tar.xz | |
drm/tilcdc: Take crtc modeset lock while updating the crtc clock rate
Take crtc modeset lock while updating the crtc clock rate. To avoid a
race in tilcdc_crtc_update_clk(), we do not want crtc mode to change
while we update crtc clock.
Signed-off-by: Jyri Sarha <jsarha@ti.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Diffstat (limited to 'drivers/gpu/drm/tilcdc/tilcdc_drv.c')
| -rw-r--r-- | drivers/gpu/drm/tilcdc/tilcdc_drv.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c index f8892e9ad169..b1ac61eac056 100644 --- a/drivers/gpu/drm/tilcdc/tilcdc_drv.c +++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c @@ -184,10 +184,13 @@ static int cpufreq_transition(struct notifier_block *nb, { struct tilcdc_drm_private *priv = container_of(nb, struct tilcdc_drm_private, freq_transition); + if (val == CPUFREQ_POSTCHANGE) { if (priv->lcd_fck_rate != clk_get_rate(priv->clk)) { + drm_modeset_lock_crtc(priv->crtc, NULL); priv->lcd_fck_rate = clk_get_rate(priv->clk); tilcdc_crtc_update_clk(priv->crtc); + drm_modeset_unlock_crtc(priv->crtc); } } |