From a624f4290ab09e996b1040c3a349241f76742327 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Tue, 1 Jul 2014 11:23:03 -0400 Subject: [PATCH] drm/radeon: add a module parameter to control deep color support Some monitors seem to have problems with deep color enabled, even though they claim to support it. I'm not sure if the monitor need a quirk or if the driver is doing something the monitor doesn't like. At this point lets just disable deep color by default like we did for hdmi audio and work through the bugs so we can eventually enable it by default. bug: https://bugs.freedesktop.org/show_bug.cgi?id=80531 Signed-off-by: Alex Deucher --- drivers/gpu/drm/radeon/radeon.h | 1 + drivers/gpu/drm/radeon/radeon_connectors.c | 3 +++ drivers/gpu/drm/radeon/radeon_drv.c | 4 ++++ 3 files changed, 8 insertions(+) diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h index 4b0bbf8..a2e1ed8 100644 --- a/drivers/gpu/drm/radeon/radeon.h +++ b/drivers/gpu/drm/radeon/radeon.h @@ -102,6 +102,7 @@ extern int radeon_runtime_pm; extern int radeon_hard_reset; extern int radeon_vm_size; extern int radeon_vm_block_size; +extern int radeon_deep_color; /* * Copy from radeon_drv.h so we don't have to include both and have conflicting diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c index 1b9177e..4483119 100644 --- a/drivers/gpu/drm/radeon/radeon_connectors.c +++ b/drivers/gpu/drm/radeon/radeon_connectors.c @@ -199,6 +199,9 @@ int radeon_get_monitor_bpc(struct drm_connector *connector) } } + if ((radeon_deep_color == 0) && (bpc > 8)) + bpc = 8; + DRM_DEBUG("%s: Display bpc=%d, returned bpc=%d\n", connector->name, connector->display_info.bpc, bpc); diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c index 6e30174..cb14213 100644 --- a/drivers/gpu/drm/radeon/radeon_drv.c +++ b/drivers/gpu/drm/radeon/radeon_drv.c @@ -175,6 +175,7 @@ int radeon_runtime_pm = -1; int radeon_hard_reset = 0; int radeon_vm_size = 4096; int radeon_vm_block_size = 9; +int radeon_deep_color = 0; MODULE_PARM_DESC(no_wb, "Disable AGP writeback for scratch registers"); module_param_named(no_wb, radeon_no_wb, int, 0444); @@ -248,6 +249,9 @@ module_param_named(vm_size, radeon_vm_size, int, 0444); MODULE_PARM_DESC(vm_block_size, "VM page table size in bits (default 9)"); module_param_named(vm_block_size, radeon_vm_block_size, int, 0444); +MODULE_PARM_DESC(deep_color, "Deep Color support (1 = enable, 0 = disable (default))"); +module_param_named(deep_color, radeon_deep_color, int, 0444); + static struct pci_device_id pciidlist[] = { radeon_PCI_IDS }; -- 1.8.3.1