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authorBenjamin Gaignard <benjamin.gaignard@linaro.org>2014-12-04 11:17:32 +0100
committerBenjamin Gaignard <benjamin.gaignard@linaro.org>2014-12-04 11:40:34 +0100
commit515a1c8416fd9e0ea542be2658625c366f4ba51b (patch)
treecd83604ad3c11ce7b4066d72895969495e948636
parentd33a38169be154920f411467a308573410b1c635 (diff)
downloadkernel-515a1c8416fd9e0ea542be2658625c366f4ba51b.tar.gz
drm: sti: clear all mixer control
Make sure that mixer control register is correctly reset before use it. Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
-rw-r--r--drivers/gpu/drm/sti/sti_drm_crtc.c2
-rw-r--r--drivers/gpu/drm/sti/sti_mixer.c9
-rw-r--r--drivers/gpu/drm/sti/sti_mixer.h1
3 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/sti/sti_drm_crtc.c b/drivers/gpu/drm/sti/sti_drm_crtc.c
index d2ae0c0e13be..e1e55503b92d 100644
--- a/drivers/gpu/drm/sti/sti_drm_crtc.c
+++ b/drivers/gpu/drm/sti/sti_drm_crtc.c
@@ -37,6 +37,8 @@ static void sti_drm_crtc_prepare(struct drm_crtc *crtc)
if (clk_prepare_enable(compo->clk_compo_aux))
DRM_INFO("Failed to prepare/enable compo_aux clk\n");
}
+
+ sti_mixer_clear_all_layers(mixer);
}
static void sti_drm_crtc_commit(struct drm_crtc *crtc)
diff --git a/drivers/gpu/drm/sti/sti_mixer.c b/drivers/gpu/drm/sti/sti_mixer.c
index 79f369db9fb6..6bcdf3f86d22 100644
--- a/drivers/gpu/drm/sti/sti_mixer.c
+++ b/drivers/gpu/drm/sti/sti_mixer.c
@@ -215,6 +215,15 @@ int sti_mixer_set_layer_status(struct sti_mixer *mixer,
return 0;
}
+void sti_mixer_clear_all_layers(struct sti_mixer *mixer)
+{
+ u32 val;
+
+ DRM_DEBUG_DRIVER("%s clear all layer\n", sti_mixer_to_str(mixer));
+ val = sti_mixer_reg_read(mixer, GAM_MIXER_CTL) & 0xFFFF0000;
+ sti_mixer_reg_write(mixer, GAM_MIXER_CTL, val);
+}
+
void sti_mixer_set_matrix(struct sti_mixer *mixer)
{
unsigned int i;
diff --git a/drivers/gpu/drm/sti/sti_mixer.h b/drivers/gpu/drm/sti/sti_mixer.h
index 874372102e52..750e1fd5a8ce 100644
--- a/drivers/gpu/drm/sti/sti_mixer.h
+++ b/drivers/gpu/drm/sti/sti_mixer.h
@@ -39,6 +39,7 @@ struct sti_mixer *sti_mixer_create(struct device *dev, int id,
int sti_mixer_set_layer_status(struct sti_mixer *mixer,
struct sti_layer *layer, bool status);
+void sti_mixer_clear_all_layers(struct sti_mixer *mixer);
int sti_mixer_set_layer_depth(struct sti_mixer *mixer, struct sti_layer *layer);
int sti_mixer_active_video_area(struct sti_mixer *mixer,
struct drm_display_mode *mode);