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76 lines
2.6 KiB
Diff
76 lines
2.6 KiB
Diff
From 5331cbb3d9cfb172ed134f08a35740e0a52d1107 Mon Sep 17 00:00:00 2001
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From: Maxime Ripard <maxime@cerno.tech>
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Date: Thu, 6 Feb 2020 14:41:41 +0100
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Subject: [PATCH] drm/vc4: plane: Move additional planes creation to
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driver
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So far the plane creation was done when each CRTC was bound, and those
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planes were only tied to the CRTC that was registering them.
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This causes two main issues:
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- The planes in the vc4 hardware are actually not tied to any CRTC, but
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can be used with every combination
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- More importantly, so far, we allocate 10 planes per CRTC, with 3 CRTCs.
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However, the next generation of hardware will have 5 CRTCs, putting us
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well above the maximum of 32 planes currently allowed by DRM.
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This patch is the first one in a series of patches that will take down both
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of these issues so that we can support the next generation of hardware
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while keeping a good amount of planes.
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We start by changing the way the planes are registered to first registering
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the primary planes for each CRTC in the CRTC bind function as we used to,
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but moving the overlay and cursor creation to the main driver bind
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function, after all the CRTCs have been bound.
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This will slightly change the ID order of the planes, since the primary
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planes of all CRTCs will be first, and then a pattern of 8 overlays, 1
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cursor plane for each CRTC.
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This shouldn't cause any trouble since the ordering between the planes is
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preserved though.
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Signed-off-by: Maxime Ripard <maxime@cerno.tech>
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---
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drivers/gpu/drm/vc4/vc4_crtc.c | 4 ----
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drivers/gpu/drm/vc4/vc4_drv.c | 7 +++++++
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2 files changed, 7 insertions(+), 4 deletions(-)
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--- a/drivers/gpu/drm/vc4/vc4_crtc.c
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+++ b/drivers/gpu/drm/vc4/vc4_crtc.c
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@@ -1190,10 +1190,6 @@ static int vc4_crtc_bind(struct device *
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*/
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drm_crtc_enable_color_mgmt(crtc, 0, true, crtc->gamma_size);
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- ret = vc4_plane_create_additional_planes(drm, crtc);
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- if (ret)
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- goto err_destroy_planes;
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-
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vc4_crtc_get_cob_allocation(vc4_crtc);
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CRTC_WRITE(PV_INTEN, 0);
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--- a/drivers/gpu/drm/vc4/vc4_drv.c
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+++ b/drivers/gpu/drm/vc4/vc4_drv.c
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@@ -253,6 +253,7 @@ static int vc4_drm_bind(struct device *d
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct drm_device *drm;
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+ struct drm_crtc *crtc;
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struct vc4_dev *vc4;
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struct device_node *node;
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int ret = 0;
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@@ -291,6 +292,12 @@ static int vc4_drm_bind(struct device *d
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if (ret)
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goto gem_destroy;
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+ drm_for_each_crtc(crtc, drm) {
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+ ret = vc4_plane_create_additional_planes(drm, crtc);
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+ if (ret)
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+ continue;
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+ }
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+
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drm_fb_helper_remove_conflicting_framebuffers(NULL, "vc4drmfb", false);
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ret = vc4_kms_load(drm);
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