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drm/nouveau/dp: make functions for executing various bios tables 

More code to do the same thing, but will make it easier to handle various
changes that could possibly happen the the VBIOS tables.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2012-03-09 15:22:19 +10:00
parent c11dd0da52
commit 8c1dcb6573
1 changed files with 46 additions and 9 deletions
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55
drivers/gpu/drm/nouveau/nouveau_dp.c
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@ -554,6 +554,49 @@ dp_link_train_eq(struct drm_device *dev, struct dp_state *dp)
return eq_done ? 0 : -1;
}
static void
dp_set_downspread(struct drm_device *dev, struct dp_state *dp, bool enable)
{
u16 script = 0x0000;
u8 *entry, *table = nouveau_dp_bios_data(dev, dp->dcb, &entry);
if (table) {
if (table[0] >= 0x20 && table[0] <= 0x30) {
if (enable)
script = ROM16(entry[12]);
else
script = ROM16(entry[14]);
}
}
nouveau_bios_run_init_table(dev, script, dp->dcb, dp->crtc);
}
static void
dp_link_train_init(struct drm_device *dev, struct dp_state *dp)
{
u16 script = 0x0000;
u8 *entry, *table = nouveau_dp_bios_data(dev, dp->dcb, &entry);
if (table) {
if (table[0] >= 0x20 && table[0] <= 0x30)
script = ROM16(entry[6]);
}
nouveau_bios_run_init_table(dev, script, dp->dcb, dp->crtc);
}
static void
dp_link_train_fini(struct drm_device *dev, struct dp_state *dp)
{
u16 script = 0x0000;
u8 *entry, *table = nouveau_dp_bios_data(dev, dp->dcb, &entry);
if (table) {
if (table[0] >= 0x20 && table[0] <= 0x30)
script = ROM16(entry[8]);
}
nouveau_bios_run_init_table(dev, script, dp->dcb, dp->crtc);
}
bool
nouveau_dp_link_train(struct drm_encoder *encoder, u32 datarate)
{
@ -589,16 +632,10 @@ nouveau_dp_link_train(struct drm_encoder *encoder, u32 datarate)
nouveau_gpio_irq(dev, 0, nv_connector->hpd, 0xff, false);
/* enable down-spreading, if possible */
if (dp.table[1] >= 16) {
u16 script = ROM16(dp.entry[14]);
if (nv_encoder->dp.dpcd[3] & 1)
script = ROM16(dp.entry[12]);
nouveau_bios_run_init_table(dev, script, dp.dcb, dp.crtc);
}
dp_set_downspread(dev, &dp, nv_encoder->dp.dpcd[3] & 1);
/* execute pre-train script from vbios */
nouveau_bios_run_init_table(dev, ROM16(dp.entry[6]), dp.dcb, dp.crtc);
dp_link_train_init(dev, &dp);
/* start off at highest link rate supported by encoder and display */
while (*link_bw > nv_encoder->dp.link_bw)
@ -632,7 +669,7 @@ nouveau_dp_link_train(struct drm_encoder *encoder, u32 datarate)
dp_set_training_pattern(dev, &dp, DP_TRAINING_PATTERN_DISABLE);
/* execute post-train script from vbios */
nouveau_bios_run_init_table(dev, ROM16(dp.entry[8]), dp.dcb, dp.crtc);
dp_link_train_fini(dev, &dp);
/* re-enable hotplug detect */
nouveau_gpio_irq(dev, 0, nv_connector->hpd, 0xff, true);