drm/nv17-nv4x: Attempt to init some external TMDS transmitters.
sil164 and friends are the most common, usually they just need to be
poked once because a fixed configuration is enough for any modes and
clocks, so they worked without this patch if the BIOS had done a good
job on POST. Display couldn't survive a suspend/resume cycle though.
Unfortunately, BIOS scripts are useless here.
Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nv04_dfp.c b/drivers/gpu/drm/nouveau/nv04_dfp.c
index 3311f3a..9871570 100644
--- a/drivers/gpu/drm/nouveau/nv04_dfp.c
+++ b/drivers/gpu/drm/nouveau/nv04_dfp.c
@@ -34,6 +34,8 @@
#include "nouveau_hw.h"
#include "nvreg.h"
+#include "i2c/sil164.h"
+
#define FP_TG_CONTROL_ON (NV_PRAMDAC_FP_TG_CONTROL_DISPEN_POS | \
NV_PRAMDAC_FP_TG_CONTROL_HSYNC_POS | \
NV_PRAMDAC_FP_TG_CONTROL_VSYNC_POS)
@@ -429,6 +431,11 @@
else
NVWriteRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL + nv04_dac_output_offset(encoder), 0x00100000);
+ /* Init external transmitters */
+ if (get_slave_funcs(encoder))
+ get_slave_funcs(encoder)->mode_set(encoder, &nv_encoder->mode,
+ &nv_encoder->mode);
+
helper->dpms(encoder, DRM_MODE_DPMS_ON);
NV_INFO(dev, "Output %s is running on CRTC %d using output %c\n",
@@ -550,10 +557,41 @@
NV_DEBUG_KMS(encoder->dev, "\n");
+ if (get_slave_funcs(encoder))
+ get_slave_funcs(encoder)->destroy(encoder);
+
drm_encoder_cleanup(encoder);
kfree(nv_encoder);
}
+static void nv04_tmds_slave_init(struct drm_encoder *encoder)
+{
+ struct drm_device *dev = encoder->dev;
+ struct dcb_entry *dcb = nouveau_encoder(encoder)->dcb;
+ struct nouveau_i2c_chan *i2c = nouveau_i2c_find(dev, 2);
+ struct i2c_board_info info[] = {
+ {
+ .type = "sil164",
+ .addr = (dcb->tmdsconf.slave_addr == 0x7 ? 0x3a : 0x38),
+ .platform_data = &(struct sil164_encoder_params) {
+ SIL164_INPUT_EDGE_RISING
+ }
+ },
+ { }
+ };
+ int type;
+
+ if (!nv_gf4_disp_arch(dev) || !i2c)
+ return;
+
+ type = nouveau_i2c_identify(dev, "TMDS transmitter", info, 2);
+ if (type < 0)
+ return;
+
+ drm_i2c_encoder_init(dev, to_encoder_slave(encoder),
+ &i2c->adapter, &info[type]);
+}
+
static const struct drm_encoder_helper_funcs nv04_lvds_helper_funcs = {
.dpms = nv04_lvds_dpms,
.save = nv04_dfp_save,
@@ -616,6 +654,10 @@
encoder->possible_crtcs = entry->heads;
encoder->possible_clones = 0;
+ if (entry->type == OUTPUT_TMDS &&
+ entry->location != DCB_LOC_ON_CHIP)
+ nv04_tmds_slave_init(encoder);
+
drm_mode_connector_attach_encoder(connector, encoder);
return 0;
}