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path: root/drivers/gpu/drm/nouveau/dispnv50/disp.c
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Diffstat (limited to 'drivers/gpu/drm/nouveau/dispnv50/disp.c')
-rw-r--r--drivers/gpu/drm/nouveau/dispnv50/disp.c42
1 files changed, 40 insertions, 2 deletions
diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
index 041e7daf8a33..6bb78076b5b5 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
@@ -36,6 +36,7 @@
#include <drm/drm_dp_helper.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_plane_helper.h>
+#include <drm/drm_scdc_helper.h>
#include <drm/drm_edid.h>
#include <nvif/class.h>
@@ -531,6 +532,7 @@ nv50_hdmi_disable(struct drm_encoder *encoder, struct nouveau_crtc *nv_crtc)
static void
nv50_hdmi_enable(struct drm_encoder *encoder, struct drm_display_mode *mode)
{
+ struct nouveau_drm *drm = nouveau_drm(encoder->dev);
struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
struct nouveau_crtc *nv_crtc = nouveau_crtc(encoder->crtc);
struct nv50_disp *disp = nv50_disp(encoder->dev);
@@ -548,9 +550,12 @@ nv50_hdmi_enable(struct drm_encoder *encoder, struct drm_display_mode *mode)
.pwr.rekey = 56, /* binary driver, and tegra, constant */
};
struct nouveau_connector *nv_connector;
+ struct drm_hdmi_info *hdmi;
u32 max_ac_packet;
union hdmi_infoframe avi_frame;
union hdmi_infoframe vendor_frame;
+ bool scdc_supported, high_tmds_clock_ratio = false, scrambling = false;
+ u8 config;
int ret;
int size;
@@ -558,8 +563,11 @@ nv50_hdmi_enable(struct drm_encoder *encoder, struct drm_display_mode *mode)
if (!drm_detect_hdmi_monitor(nv_connector->edid))
return;
+ hdmi = &nv_connector->base.display_info.hdmi;
+ scdc_supported = hdmi->scdc.supported;
+
ret = drm_hdmi_avi_infoframe_from_display_mode(&avi_frame.avi, mode,
- false);
+ scdc_supported);
if (!ret) {
/* We have an AVI InfoFrame, populate it to the display */
args.pwr.avi_infoframe_length
@@ -582,12 +590,42 @@ nv50_hdmi_enable(struct drm_encoder *encoder, struct drm_display_mode *mode)
max_ac_packet -= 18; /* constant from tegra */
args.pwr.max_ac_packet = max_ac_packet / 32;
+ if (hdmi->scdc.scrambling.supported) {
+ high_tmds_clock_ratio = mode->clock > 340000;
+ scrambling = high_tmds_clock_ratio ||
+ hdmi->scdc.scrambling.low_rates;
+ }
+
+ args.pwr.scdc =
+ NV50_DISP_SOR_HDMI_PWR_V0_SCDC_SCRAMBLE * scrambling |
+ NV50_DISP_SOR_HDMI_PWR_V0_SCDC_DIV_BY_4 * high_tmds_clock_ratio;
+
size = sizeof(args.base)
+ sizeof(args.pwr)
+ args.pwr.avi_infoframe_length
+ args.pwr.vendor_infoframe_length;
nvif_mthd(&disp->disp->object, 0, &args, size);
+
nv50_audio_enable(encoder, mode);
+
+ /* If SCDC is supported by the downstream monitor, update
+ * divider / scrambling settings to what we programmed above.
+ */
+ if (!hdmi->scdc.scrambling.supported)
+ return;
+
+ ret = drm_scdc_readb(nv_encoder->i2c, SCDC_TMDS_CONFIG, &config);
+ if (ret < 0) {
+ NV_ERROR(drm, "Failure to read SCDC_TMDS_CONFIG: %d\n", ret);
+ return;
+ }
+ config &= ~(SCDC_TMDS_BIT_CLOCK_RATIO_BY_40 | SCDC_SCRAMBLING_ENABLE);
+ config |= SCDC_TMDS_BIT_CLOCK_RATIO_BY_40 * high_tmds_clock_ratio;
+ config |= SCDC_SCRAMBLING_ENABLE * scrambling;
+ ret = drm_scdc_writeb(nv_encoder->i2c, SCDC_TMDS_CONFIG, config);
+ if (ret < 0)
+ NV_ERROR(drm, "Failure to write SCDC_TMDS_CONFIG = 0x%02x: %d\n",
+ config, ret);
}
/******************************************************************************
@@ -2218,7 +2256,7 @@ nv50_display_create(struct drm_device *dev)
nouveau_display(dev)->fini = nv50_display_fini;
disp->disp = &nouveau_display(dev)->disp;
dev->mode_config.funcs = &nv50_disp_func;
- dev->driver->driver_features |= DRIVER_PREFER_XBGR_30BPP;
+ dev->mode_config.quirk_addfb_prefer_xbgr_30bpp = true;
/* small shared memory area we use for notifiers and semaphores */
ret = nouveau_bo_new(&drm->client, 4096, 0x1000, TTM_PL_FLAG_VRAM,