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39 lines
1.4 KiB
Diff
39 lines
1.4 KiB
Diff
From bce8c3dc146e3287519d5f6bb965dc2458e6684d Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.org>
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Date: Thu, 30 May 2019 15:55:15 +0100
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Subject: [PATCH] drm/vc4: Max resolution of 7680 is conditional on
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being Pi4
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The max resolution had been increased from 2048 to 7680 for all
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platforms. This code is common with Pi0-3 which have a max render
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target for GL of 2048, therefore the increased resolution has to
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be conditional on the platform.
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Switch based on whether the bcm2835-v3d node is found, as that is
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not present on Pi4. (There is a potential configuration on Pi0-3
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with no v3d, but this is very unlikely).
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
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---
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drivers/gpu/drm/vc4/vc4_kms.c | 10 ++++++++--
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1 file changed, 8 insertions(+), 2 deletions(-)
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--- a/drivers/gpu/drm/vc4/vc4_kms.c
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+++ b/drivers/gpu/drm/vc4/vc4_kms.c
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@@ -429,8 +429,14 @@ int vc4_kms_load(struct drm_device *dev)
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return ret;
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}
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- dev->mode_config.max_width = 7680;
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- dev->mode_config.max_height = 7680;
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+ if (!drm_core_check_feature(dev, DRIVER_RENDER)) {
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+ /* No V3D as part of vc4. Assume this is Pi4. */
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+ dev->mode_config.max_width = 7680;
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+ dev->mode_config.max_height = 7680;
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+ } else {
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+ dev->mode_config.max_width = 2048;
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+ dev->mode_config.max_height = 2048;
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+ }
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dev->mode_config.funcs = &vc4_mode_funcs;
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dev->mode_config.preferred_depth = 24;
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dev->mode_config.async_page_flip = true;
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