drm: mali-dp: add malidp_crtc_state struct

Add a custom CRTC state struct to enable storing driver's private
state. This patch only adds the base drm_crtc_state struct and
the atomic functions that handle it.

Signed-off-by: Mihail Atanassov <mihail.atanassov@arm.com>
Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>

diff --git a/drivers/gpu/drm/arm/malidp_crtc.c b/drivers/gpu/drm/arm/malidp_crtc.c
index fab776c..ec1396f 100644 (file)
--- a/drivers/gpu/drm/arm/malidp_crtc.c
+++ b/drivers/gpu/drm/arm/malidp_crtc.c
@@ -178,6 +178,52 @@ static const struct drm_crtc_helper_funcs malidp_crtc_helper_funcs = {
        .atomic_check = malidp_crtc_atomic_check,
 };
 
+static struct drm_crtc_state *malidp_crtc_duplicate_state(struct drm_crtc *crtc)
+{
+       struct malidp_crtc_state *state;
+
+       if (WARN_ON(!crtc->state))
+               return NULL;
+
+       state = kmalloc(sizeof(*state), GFP_KERNEL);
+       if (!state)
+               return NULL;
+
+       __drm_atomic_helper_crtc_duplicate_state(crtc, &state->base);
+
+       return &state->base;
+}
+
+static void malidp_crtc_reset(struct drm_crtc *crtc)
+{
+       struct malidp_crtc_state *state = NULL;
+
+       if (crtc->state) {
+               state = to_malidp_crtc_state(crtc->state);
+               __drm_atomic_helper_crtc_destroy_state(crtc->state);
+       }
+
+       kfree(state);
+       state = kzalloc(sizeof(*state), GFP_KERNEL);
+       if (state) {
+               crtc->state = &state->base;
+               crtc->state->crtc = crtc;
+       }
+}
+
+static void malidp_crtc_destroy_state(struct drm_crtc *crtc,
+                                     struct drm_crtc_state *state)
+{
+       struct malidp_crtc_state *mali_state = NULL;
+
+       if (state) {
+               mali_state = to_malidp_crtc_state(state);
+               __drm_atomic_helper_crtc_destroy_state(state);
+       }
+
+       kfree(mali_state);
+}
+
 static int malidp_crtc_enable_vblank(struct drm_crtc *crtc)
 {
        struct malidp_drm *malidp = crtc_to_malidp_device(crtc);
@@ -201,9 +247,9 @@ static const struct drm_crtc_funcs malidp_crtc_funcs = {
        .destroy = drm_crtc_cleanup,
        .set_config = drm_atomic_helper_set_config,
        .page_flip = drm_atomic_helper_page_flip,
-       .reset = drm_atomic_helper_crtc_reset,
-       .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
-       .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
+       .reset = malidp_crtc_reset,
+       .atomic_duplicate_state = malidp_crtc_duplicate_state,
+       .atomic_destroy_state = malidp_crtc_destroy_state,
        .enable_vblank = malidp_crtc_enable_vblank,
        .disable_vblank = malidp_crtc_disable_vblank,
 };

diff --git a/drivers/gpu/drm/arm/malidp_drv.h b/drivers/gpu/drm/arm/malidp_drv.h
index cd4c04c..bdc2620 100644 (file)
--- a/drivers/gpu/drm/arm/malidp_drv.h
+++ b/drivers/gpu/drm/arm/malidp_drv.h
@@ -48,6 +48,12 @@ struct malidp_plane_state {
 #define to_malidp_plane(x) container_of(x, struct malidp_plane, base)
 #define to_malidp_plane_state(x) container_of(x, struct malidp_plane_state, base)
 
+struct malidp_crtc_state {
+       struct drm_crtc_state base;
+};
+
+#define to_malidp_crtc_state(x) container_of(x, struct malidp_crtc_state, base)
+
 int malidp_de_planes_init(struct drm_device *drm);
 void malidp_de_planes_destroy(struct drm_device *drm);
 int malidp_crtc_init(struct drm_device *drm);