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2b1c6b21b5
As usual these patches were extracted and rebased from the raspberry pi repo: https://github.com/raspberrypi/linux/tree/rpi-4.4.y Also adds support for Raspberry Pi Compute Module 3 (untested). Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
107 lines
3.5 KiB
Diff
107 lines
3.5 KiB
Diff
From dfda3a55b70ee0b1227ec4551d6376d463dd14b9 Mon Sep 17 00:00:00 2001
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From: Eric Anholt <eric@anholt.net>
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Date: Tue, 20 Oct 2015 14:18:56 +0100
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Subject: [PATCH] drm/vc4: Add more display planes to each CRTC.
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Previously we only did the primary and cursor plane, but overlay
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planes are useful and just require this setup to add, since all planes
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go into the HVS display list in the same way.
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Signed-off-by: Eric Anholt <eric@anholt.net>
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(cherry picked from commit fc2d6f1eabee9d971453da2a27a72471c2a347dd)
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---
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drivers/gpu/drm/vc4/vc4_crtc.c | 56 ++++++++++++++++++++++++++++++------------
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1 file changed, 40 insertions(+), 16 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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@@ -677,9 +677,9 @@ static int vc4_crtc_bind(struct device *
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struct vc4_dev *vc4 = to_vc4_dev(drm);
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struct vc4_crtc *vc4_crtc;
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struct drm_crtc *crtc;
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- struct drm_plane *primary_plane, *cursor_plane;
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+ struct drm_plane *primary_plane, *cursor_plane, *destroy_plane, *temp;
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const struct of_device_id *match;
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- int ret;
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+ int ret, i;
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vc4_crtc = devm_kzalloc(dev, sizeof(*vc4_crtc), GFP_KERNEL);
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if (!vc4_crtc)
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@@ -708,27 +708,49 @@ static int vc4_crtc_bind(struct device *
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goto err;
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}
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- cursor_plane = vc4_plane_init(drm, DRM_PLANE_TYPE_CURSOR);
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- if (IS_ERR(cursor_plane)) {
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- dev_err(dev, "failed to construct cursor plane\n");
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- ret = PTR_ERR(cursor_plane);
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- goto err_primary;
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- }
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-
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- drm_crtc_init_with_planes(drm, crtc, primary_plane, cursor_plane,
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+ drm_crtc_init_with_planes(drm, crtc, primary_plane, NULL,
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&vc4_crtc_funcs);
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drm_crtc_helper_add(crtc, &vc4_crtc_helper_funcs);
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primary_plane->crtc = crtc;
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- cursor_plane->crtc = crtc;
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vc4->crtc[drm_crtc_index(crtc)] = vc4_crtc;
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vc4_crtc->channel = vc4_crtc->data->hvs_channel;
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+ /* Set up some arbitrary number of planes. We're not limited
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+ * by a set number of physical registers, just the space in
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+ * the HVS (16k) and how small an plane can be (28 bytes).
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+ * However, each plane we set up takes up some memory, and
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+ * increases the cost of looping over planes, which atomic
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+ * modesetting does quite a bit. As a result, we pick a
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+ * modest number of planes to expose, that should hopefully
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+ * still cover any sane usecase.
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+ */
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+ for (i = 0; i < 8; i++) {
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+ struct drm_plane *plane =
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+ vc4_plane_init(drm, DRM_PLANE_TYPE_OVERLAY);
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+
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+ if (IS_ERR(plane))
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+ continue;
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+
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+ plane->possible_crtcs = 1 << drm_crtc_index(crtc);
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+ }
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+
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+ /* Set up the legacy cursor after overlay initialization,
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+ * since we overlay planes on the CRTC in the order they were
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+ * initialized.
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+ */
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+ cursor_plane = vc4_plane_init(drm, DRM_PLANE_TYPE_CURSOR);
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+ if (!IS_ERR(cursor_plane)) {
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+ cursor_plane->possible_crtcs = 1 << drm_crtc_index(crtc);
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+ cursor_plane->crtc = crtc;
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+ crtc->cursor = cursor_plane;
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+ }
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+
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CRTC_WRITE(PV_INTEN, 0);
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CRTC_WRITE(PV_INTSTAT, PV_INT_VFP_START);
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ret = devm_request_irq(dev, platform_get_irq(pdev, 0),
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vc4_crtc_irq_handler, 0, "vc4 crtc", vc4_crtc);
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if (ret)
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- goto err_cursor;
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+ goto err_destroy_planes;
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vc4_set_crtc_possible_masks(drm, crtc);
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@@ -736,10 +758,12 @@ static int vc4_crtc_bind(struct device *
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return 0;
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-err_cursor:
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- cursor_plane->funcs->destroy(cursor_plane);
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-err_primary:
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- primary_plane->funcs->destroy(primary_plane);
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+err_destroy_planes:
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+ list_for_each_entry_safe(destroy_plane, temp,
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+ &drm->mode_config.plane_list, head) {
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+ if (destroy_plane->possible_crtcs == 1 << drm_crtc_index(crtc))
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+ destroy_plane->funcs->destroy(destroy_plane);
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+ }
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err:
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return ret;
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}
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