From 1a0c96c075bb4517d4ce4fb6750ee0a3cf38714c Mon Sep 17 00:00:00 2001 From: Ilia Mirkin Date: Tue, 3 Nov 2015 21:00:11 -0500 Subject: [PATCH] drm/nouveau/kms: allow 225/297MHz pixel clocks for HDMI on Fermi/Kepler Some Fermi's apparently alow allow 297MHz clocks, so create a parameter which allows end-users to set it themselves until we have a reliable way to determine the board's maximum pixel clocks. Signed-off-by: Ilia Mirkin Signed-off-by: Ben Skeggs --- drivers/gpu/drm/nouveau/nouveau_connector.c | 24 ++++++++++++++++++--- 1 file changed, 21 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c index 5dd1d0111cac..8d00d006fcde 100644 --- a/drivers/gpu/drm/nouveau/nouveau_connector.c +++ b/drivers/gpu/drm/nouveau/nouveau_connector.c @@ -56,6 +56,10 @@ MODULE_PARM_DESC(duallink, "Allow dual-link TMDS (default: enabled)"); int nouveau_duallink = 1; module_param_named(duallink, nouveau_duallink, int, 0400); +MODULE_PARM_DESC(hdmimhz, "Force a maximum HDMI pixel clock (in MHz)"); +int nouveau_hdmimhz = 0; +module_param_named(hdmimhz, nouveau_hdmimhz, int, 0400); + struct nouveau_encoder * find_encoder(struct drm_connector *connector, int type) { @@ -809,12 +813,23 @@ nouveau_connector_get_modes(struct drm_connector *connector) } static unsigned -get_tmds_link_bandwidth(struct drm_connector *connector) +get_tmds_link_bandwidth(struct drm_connector *connector, bool hdmi) { struct nouveau_connector *nv_connector = nouveau_connector(connector); struct nouveau_drm *drm = nouveau_drm(connector->dev); struct dcb_output *dcb = nv_connector->detected_encoder->dcb; + if (hdmi) { + if (nouveau_hdmimhz > 0) + return nouveau_hdmimhz * 1000; + /* Note: these limits are conservative, some Fermi's + * can do 297 MHz. Unclear how this can be determined. + */ + if (drm->device.info.family >= NV_DEVICE_INFO_V0_KEPLER) + return 297000; + if (drm->device.info.family >= NV_DEVICE_INFO_V0_FERMI) + return 225000; + } if (dcb->location != DCB_LOC_ON_CHIP || drm->device.info.chipset >= 0x46) return 165000; @@ -835,6 +850,7 @@ nouveau_connector_mode_valid(struct drm_connector *connector, struct drm_encoder *encoder = to_drm_encoder(nv_encoder); unsigned min_clock = 25000, max_clock = min_clock; unsigned clock = mode->clock; + bool hdmi; switch (nv_encoder->dcb->type) { case DCB_OUTPUT_LVDS: @@ -847,8 +863,10 @@ nouveau_connector_mode_valid(struct drm_connector *connector, max_clock = 400000; break; case DCB_OUTPUT_TMDS: - max_clock = get_tmds_link_bandwidth(connector); - if (nouveau_duallink && nv_encoder->dcb->duallink_possible) + hdmi = drm_detect_hdmi_monitor(nv_connector->edid); + max_clock = get_tmds_link_bandwidth(connector, hdmi); + if (!hdmi && nouveau_duallink && + nv_encoder->dcb->duallink_possible) max_clock *= 2; break; case DCB_OUTPUT_ANALOG: -- 2.20.1