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Subject[PATCH v3 063/105] drm/vc4: crtc: Move the CRTC initialisation to a separate function
Date
The upcoming patches to turn the TXP into a full-blown CRTC will have the
same CRTC initialisation code, so let's move it into a separate, public,
function so that we can reuse it later on.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
drivers/gpu/drm/vc4/vc4_crtc.c | 89 ++++++++++++++++++++---------------
drivers/gpu/drm/vc4/vc4_drv.h | 3 +-
2 files changed, 55 insertions(+), 37 deletions(-)

diff --git a/drivers/gpu/drm/vc4/vc4_crtc.c b/drivers/gpu/drm/vc4/vc4_crtc.c
index ee4381c144a5..6d7799ff8f87 100644
--- a/drivers/gpu/drm/vc4/vc4_crtc.c
+++ b/drivers/gpu/drm/vc4/vc4_crtc.c
@@ -1051,16 +1051,59 @@ static void vc4_set_crtc_possible_masks(struct drm_device *drm,
}
}

+int vc4_crtc_init(struct drm_device *drm, struct vc4_crtc *vc4_crtc,
+ const struct drm_crtc_funcs *crtc_funcs,
+ const struct drm_crtc_helper_funcs *crtc_helper_funcs)
+{
+ struct vc4_dev *vc4 = to_vc4_dev(drm);
+ struct drm_crtc *crtc = &vc4_crtc->base;
+ struct drm_plane *primary_plane;
+ unsigned int i;
+
+ /* For now, we create just the primary and the legacy cursor
+ * planes. We should be able to stack more planes on easily,
+ * but to do that we would need to compute the bandwidth
+ * requirement of the plane configuration, and reject ones
+ * that will take too much.
+ */
+ primary_plane = vc4_plane_init(drm, DRM_PLANE_TYPE_PRIMARY);
+ if (IS_ERR(primary_plane)) {
+ dev_err(drm->dev, "failed to construct primary plane\n");
+ return PTR_ERR(primary_plane);
+ }
+
+ drm_crtc_init_with_planes(drm, crtc, primary_plane, NULL,
+ crtc_funcs, NULL);
+ drm_crtc_helper_add(crtc, crtc_helper_funcs);
+
+ if (!vc4->hvs->hvs5) {
+ drm_mode_crtc_set_gamma_size(crtc, ARRAY_SIZE(vc4_crtc->lut_r));
+
+ /* We support CTM, but only for one CRTC at a
+ * time. It's therefore implemented as private driver
+ * state in vc4_kms, not here.
+ */
+ drm_crtc_enable_color_mgmt(crtc, 0, true, crtc->gamma_size);
+ }
+
+ for (i = 0; i < crtc->gamma_size; i++) {
+ vc4_crtc->lut_r[i] = i;
+ vc4_crtc->lut_g[i] = i;
+ vc4_crtc->lut_b[i] = i;
+ }
+
+ return 0;
+}
+
static int vc4_crtc_bind(struct device *dev, struct device *master, void *data)
{
struct platform_device *pdev = to_platform_device(dev);
struct drm_device *drm = dev_get_drvdata(master);
- struct vc4_dev *vc4 = to_vc4_dev(drm);
const struct vc4_pv_data *pv_data;
struct vc4_crtc *vc4_crtc;
struct drm_crtc *crtc;
- struct drm_plane *primary_plane, *destroy_plane, *temp;
- int ret, i;
+ struct drm_plane *destroy_plane, *temp;
+ int ret;

vc4_crtc = devm_kzalloc(dev, sizeof(*vc4_crtc), GFP_KERNEL);
if (!vc4_crtc)
@@ -1081,32 +1124,12 @@ static int vc4_crtc_bind(struct device *dev, struct device *master, void *data)
vc4_crtc->regset.regs = crtc_regs;
vc4_crtc->regset.nregs = ARRAY_SIZE(crtc_regs);

- /* For now, we create just the primary and the legacy cursor
- * planes. We should be able to stack more planes on easily,
- * but to do that we would need to compute the bandwidth
- * requirement of the plane configuration, and reject ones
- * that will take too much.
- */
- primary_plane = vc4_plane_init(drm, DRM_PLANE_TYPE_PRIMARY);
- if (IS_ERR(primary_plane)) {
- dev_err(dev, "failed to construct primary plane\n");
- ret = PTR_ERR(primary_plane);
- goto err;
- }
-
- drm_crtc_init_with_planes(drm, crtc, primary_plane, NULL,
- &vc4_crtc_funcs, NULL);
- drm_crtc_helper_add(crtc, &vc4_crtc_helper_funcs);
-
- if (!vc4->hvs->hvs5) {
- drm_mode_crtc_set_gamma_size(crtc, ARRAY_SIZE(vc4_crtc->lut_r));
+ ret = vc4_crtc_init(drm, vc4_crtc,
+ &vc4_crtc_funcs, &vc4_crtc_helper_funcs);
+ if (ret)
+ return ret;

- /* We support CTM, but only for one CRTC at a
- * time. It's therefore implemented as private driver
- * state in vc4_kms, not here.
- */
- drm_crtc_enable_color_mgmt(crtc, 0, true, crtc->gamma_size);
- }
+ vc4_set_crtc_possible_masks(drm, crtc);

CRTC_WRITE(PV_INTEN, 0);
CRTC_WRITE(PV_INTSTAT, PV_INT_VFP_START);
@@ -1117,14 +1140,6 @@ static int vc4_crtc_bind(struct device *dev, struct device *master, void *data)
if (ret)
goto err_destroy_planes;

- vc4_set_crtc_possible_masks(drm, crtc);
-
- for (i = 0; i < crtc->gamma_size; i++) {
- vc4_crtc->lut_r[i] = i;
- vc4_crtc->lut_g[i] = i;
- vc4_crtc->lut_b[i] = i;
- }
-
platform_set_drvdata(pdev, vc4_crtc);

vc4_debugfs_add_regset32(drm, pv_data->debugfs_name,
@@ -1138,7 +1153,7 @@ static int vc4_crtc_bind(struct device *dev, struct device *master, void *data)
if (destroy_plane->possible_crtcs == drm_crtc_mask(crtc))
destroy_plane->funcs->destroy(destroy_plane);
}
-err:
+
return ret;
}

diff --git a/drivers/gpu/drm/vc4/vc4_drv.h b/drivers/gpu/drm/vc4/vc4_drv.h
index ed09acbc5660..999841b1edd8 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.h
+++ b/drivers/gpu/drm/vc4/vc4_drv.h
@@ -817,6 +817,9 @@ void vc4_bo_remove_from_purgeable_pool(struct vc4_bo *bo);
/* vc4_crtc.c */
extern struct platform_driver vc4_crtc_driver;
int vc4_crtc_disable_at_boot(struct drm_crtc *crtc);
+int vc4_crtc_init(struct drm_device *drm, struct vc4_crtc *vc4_crtc,
+ const struct drm_crtc_funcs *crtc_funcs,
+ const struct drm_crtc_helper_funcs *crtc_helper_funcs);
void vc4_crtc_destroy(struct drm_crtc *crtc);
int vc4_page_flip(struct drm_crtc *crtc,
struct drm_framebuffer *fb,
--
git-series 0.9.1
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