From 6a4f1880fdd114ea413f57ae395daf7373bb8588 Mon Sep 17 00:00:00 2001 From: Elws. Starnight From: Elws. Starnight Date: Tue, 27 Nov 2018 17:52:32 +0100 Subject: [PATCH] radeon.hdmimhz parameter introduced * proven to work for a radeon XFX R5 230 card with radeon.hdmimhz=297 3840x2160@30 is offered automatically and can be set successfully with an AOC u2868pqu as well as an iiyama X4071UHSU monitor; no heat issues in the long term (cooler moderately warm after running half a day) * radeon_encoders.c: radeon_dig_monitor_is_duallink must always return false otherwise screen stays black for the settings described above --- drivers/gpu/drm/radeon/radeon.h | 1 + drivers/gpu/drm/radeon/radeon_connectors.c | 16 ++++++++++------ drivers/gpu/drm/radeon/radeon_drv.c | 4 ++++ drivers/gpu/drm/radeon/radeon_encoders.c | 3 +++ 4 files changed, 18 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h index 1a6f6edb3515..843e051e526d 100644 --- a/drivers/gpu/drm/radeon/radeon.h +++ b/drivers/gpu/drm/radeon/radeon.h @@ -112,6 +112,7 @@ extern int radeon_use_pflipirq; extern int radeon_bapm; extern int radeon_backlight; extern int radeon_auxch; +extern int radeon_hdmimhz; extern int radeon_mst; extern int radeon_uvd; extern int radeon_vce; diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c index 414642e5b7a3..1930ba7c35c1 100644 --- a/drivers/gpu/drm/radeon/radeon_connectors.c +++ b/drivers/gpu/drm/radeon/radeon_connectors.c @@ -1480,6 +1480,7 @@ static enum drm_mode_status radeon_dvi_mode_valid(struct drm_connector *connecto struct drm_device *dev = connector->dev; struct radeon_device *rdev = dev->dev_private; struct radeon_connector *radeon_connector = to_radeon_connector(connector); + int mode_valid = MODE_OK; /* XXX check mode bandwidth */ @@ -1487,7 +1488,7 @@ static enum drm_mode_status radeon_dvi_mode_valid(struct drm_connector *connecto if (radeon_connector->use_digital && (rdev->family == CHIP_RV100) && (mode->clock > 135000)) - return MODE_CLOCK_HIGH; + return MODE_CLOCK_HIGH; // never override since this is a known issue if (radeon_connector->use_digital && (mode->clock > 165000)) { if ((radeon_connector->connector_object_id == CONNECTOR_OBJECT_ID_DUAL_LINK_DVI_I) || @@ -1497,19 +1498,22 @@ static enum drm_mode_status radeon_dvi_mode_valid(struct drm_connector *connecto else if (ASIC_IS_DCE6(rdev) && drm_detect_hdmi_monitor(radeon_connector_edid(connector))) { /* HDMI 1.3+ supports max clock of 340 Mhz */ if (mode->clock > 340000) - return MODE_CLOCK_HIGH; + mode_valid = MODE_CLOCK_HIGH; else return MODE_OK; } else { - return MODE_CLOCK_HIGH; + mode_valid = MODE_CLOCK_HIGH; } } + if ( radeon_hdmimhz > 0 && ( mode->clock <= radeon_hdmimhz * 1000 ) ) + mode_valid = MODE_OK; + /* check against the max pixel clock */ - if ((mode->clock / 10) > rdev->clock.max_pixel_clock) - return MODE_CLOCK_HIGH; + if ( mode_valid == MODE_OK && (mode->clock / 10) > rdev->clock.max_pixel_clock ) + mode_valid = MODE_CLOCK_HIGH; - return MODE_OK; + return mode_valid; } static const struct drm_connector_helper_funcs radeon_dvi_connector_helper_funcs = { diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c index 99c63eeb2866..b62ac35c7eb4 100644 --- a/drivers/gpu/drm/radeon/radeon_drv.c +++ b/drivers/gpu/drm/radeon/radeon_drv.c @@ -198,6 +198,7 @@ int radeon_use_pflipirq = 2; int radeon_bapm = -1; int radeon_backlight = -1; int radeon_auxch = -1; +int radeon_hdmimhz = 0; int radeon_mst = 0; int radeon_uvd = 1; int radeon_vce = 1; @@ -289,6 +290,9 @@ module_param_named(backlight, radeon_backlight, int, 0444); MODULE_PARM_DESC(auxch, "Use native auxch experimental support (1 = enable, 0 = disable, -1 = auto)"); 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(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 c341fb2a5b56..219b2dc038bc 100644 --- a/drivers/gpu/drm/radeon/radeon_encoders.c +++ b/drivers/gpu/drm/radeon/radeon_encoders.c @@ -372,6 +372,9 @@ 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) + return false; + connector = radeon_get_connector_for_encoder(encoder); /* if we don't have an active device yet, just use one of * the connectors tied to the encoder. -- 2.11.0