From a76c9eb8cde6725ba8db6c1f78df4bf6582082fb Mon Sep 17 00:00:00 2001 From: Elws. Starnight From: Elws. Starnight Date: Tue, 27 Nov 2018 18:03:33 +0100 Subject: [PATCH] radeon.duallink parameter introduced * has only effect when radeon.hdmimhz != 0; it allows for duallink if the driver decides so * may be useful when connecting over a dual-link-DVI * as expected it was detremential with the R5 230 card for 3840x2160@30 over HDMI 1.4 --- drivers/gpu/drm/radeon/radeon.h | 1 + drivers/gpu/drm/radeon/radeon_drv.c | 4 ++++ drivers/gpu/drm/radeon/radeon_encoders.c | 2 +- 3 files changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h index 843e051e526d..120bc523e370 100644 --- a/drivers/gpu/drm/radeon/radeon.h +++ b/drivers/gpu/drm/radeon/radeon.h @@ -113,6 +113,7 @@ extern int radeon_bapm; extern int radeon_backlight; extern int radeon_auxch; extern int radeon_hdmimhz; +extern int radeon_duallink; extern int radeon_mst; extern int radeon_uvd; extern int radeon_vce; diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c index b62ac35c7eb4..b394736031c2 100644 --- a/drivers/gpu/drm/radeon/radeon_drv.c +++ b/drivers/gpu/drm/radeon/radeon_drv.c @@ -199,6 +199,7 @@ int radeon_bapm = -1; int radeon_backlight = -1; int radeon_auxch = -1; int radeon_hdmimhz = 0; +int radeon_duallink = 0; int radeon_mst = 0; int radeon_uvd = 1; int radeon_vce = 1; @@ -293,6 +294,9 @@ module_param_named(auxch, radeon_auxch, int, 0444); MODULE_PARM_DESC(hdmimhz, "Force a maximum HDMI pixel clock (in MHz); try 165/225/297/330 to overclock your TMDS for gaining a higher resolution."); module_param_named(hdmimhz, radeon_hdmimhz, int, 0444); +MODULE_PARM_DESC(duallink, "Allow for the dual link feature when overclocking with radeon.hdmimhz."); +module_param_named(duallink, radeon_duallink, int, 0444); + MODULE_PARM_DESC(mst, "DisplayPort MST experimental support (1 = enable, 0 = disable)"); module_param_named(mst, radeon_mst, int, 0444); diff --git a/drivers/gpu/drm/radeon/radeon_encoders.c b/drivers/gpu/drm/radeon/radeon_encoders.c index 219b2dc038bc..a034d5080a54 100644 --- a/drivers/gpu/drm/radeon/radeon_encoders.c +++ b/drivers/gpu/drm/radeon/radeon_encoders.c @@ -372,7 +372,7 @@ bool radeon_dig_monitor_is_duallink(struct drm_encoder *encoder, struct radeon_connector *radeon_connector; struct radeon_connector_atom_dig *dig_connector; - if(radeon_hdmimhz > 0) + if( radeon_hdmimhz > 0 && !radeon_duallink ) return false; connector = radeon_get_connector_for_encoder(encoder); -- 2.11.0