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drm/i915: split fdi code out from intel_display.c

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This just refactors out the fdi code to a separate file.

Signed-off-by: Dave Airlie <airlied@redhat.com>
[Jani: cleaned up intel_fdi.h a bit.]
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/f9d52c3d91f0973af308ede16e266fc9b753ecf9.1610622609.git.jani.nikula@intel.com
This commit is contained in:
Dave Airlie 2021-01-14 13:13:47 +02:00 committed by Jani Nikula
parent 8cf41f316e
commit 777e687a0c
5 changed files with 718 additions and 682 deletions
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1
drivers/gpu/drm/i915/Makefile
View File

@ -206,6 +206,7 @@ i915-y += \
display/intel_dpll_mgr.o \
display/intel_dsb.o \
display/intel_fbc.o \
display/intel_fdi.o \
display/intel_fifo_underrun.o \
display/intel_frontbuffer.o \
display/intel_global_state.o \

685
drivers/gpu/drm/i915/display/intel_display.c
View File

@ -74,6 +74,7 @@
#include "intel_display_types.h"
#include "intel_dp_link_training.h"
#include "intel_fbc.h"
#include "intel_fdi.h"
#include "intel_fbdev.h"
#include "intel_fifo_underrun.h"
#include "intel_frontbuffer.h"
@ -173,16 +174,6 @@ static void intel_update_czclk(struct drm_i915_private *dev_priv)
dev_priv->czclk_freq);
}
/* units of 100MHz */
static u32 intel_fdi_link_freq(struct drm_i915_private *dev_priv,
const struct intel_crtc_state *pipe_config)
{
if (HAS_DDI(dev_priv))
return pipe_config->port_clock; /* SPLL */
else
return dev_priv->fdi_pll_freq;
}
/* WA Display #0827: Gen9:all */
static void
skl_wa_827(struct drm_i915_private *dev_priv, enum pipe pipe, bool enable)
@ -3727,532 +3718,6 @@ static void icl_set_pipe_chicken(struct intel_crtc *crtc)
intel_de_write(dev_priv, PIPE_CHICKEN(pipe), tmp);
}
static void intel_fdi_normal_train(struct intel_crtc *crtc)
{
struct drm_device *dev = crtc->base.dev;
struct drm_i915_private *dev_priv = to_i915(dev);
enum pipe pipe = crtc->pipe;
i915_reg_t reg;
u32 temp;
/* enable normal train */
reg = FDI_TX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
if (IS_IVYBRIDGE(dev_priv)) {
temp &= ~FDI_LINK_TRAIN_NONE_IVB;
temp |= FDI_LINK_TRAIN_NONE_IVB | FDI_TX_ENHANCE_FRAME_ENABLE;
} else {
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_NONE | FDI_TX_ENHANCE_FRAME_ENABLE;
}
intel_de_write(dev_priv, reg, temp);
reg = FDI_RX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
if (HAS_PCH_CPT(dev_priv)) {
temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
temp |= FDI_LINK_TRAIN_NORMAL_CPT;
} else {
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_NONE;
}
intel_de_write(dev_priv, reg, temp | FDI_RX_ENHANCE_FRAME_ENABLE);
/* wait one idle pattern time */
intel_de_posting_read(dev_priv, reg);
udelay(1000);
/* IVB wants error correction enabled */
if (IS_IVYBRIDGE(dev_priv))
intel_de_write(dev_priv, reg,
intel_de_read(dev_priv, reg) | FDI_FS_ERRC_ENABLE | FDI_FE_ERRC_ENABLE);
}
/* The FDI link training functions for ILK/Ibexpeak. */
static void ilk_fdi_link_train(struct intel_crtc *crtc,
const struct intel_crtc_state *crtc_state)
{
struct drm_device *dev = crtc->base.dev;
struct drm_i915_private *dev_priv = to_i915(dev);
enum pipe pipe = crtc->pipe;
i915_reg_t reg;
u32 temp, tries;
/* FDI needs bits from pipe first */
assert_pipe_enabled(dev_priv, crtc_state->cpu_transcoder);
/* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
for train result */
reg = FDI_RX_IMR(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_RX_SYMBOL_LOCK;
temp &= ~FDI_RX_BIT_LOCK;
intel_de_write(dev_priv, reg, temp);
intel_de_read(dev_priv, reg);
udelay(150);
/* enable CPU FDI TX and PCH FDI RX */
reg = FDI_TX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_DP_PORT_WIDTH_MASK;
temp |= FDI_DP_PORT_WIDTH(crtc_state->fdi_lanes);
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_1;
intel_de_write(dev_priv, reg, temp | FDI_TX_ENABLE);
reg = FDI_RX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_1;
intel_de_write(dev_priv, reg, temp | FDI_RX_ENABLE);
intel_de_posting_read(dev_priv, reg);
udelay(150);
/* Ironlake workaround, enable clock pointer after FDI enable*/
intel_de_write(dev_priv, FDI_RX_CHICKEN(pipe),
FDI_RX_PHASE_SYNC_POINTER_OVR);
intel_de_write(dev_priv, FDI_RX_CHICKEN(pipe),
FDI_RX_PHASE_SYNC_POINTER_OVR | FDI_RX_PHASE_SYNC_POINTER_EN);
reg = FDI_RX_IIR(pipe);
for (tries = 0; tries < 5; tries++) {
temp = intel_de_read(dev_priv, reg);
drm_dbg_kms(&dev_priv->drm, "FDI_RX_IIR 0x%x\n", temp);
if ((temp & FDI_RX_BIT_LOCK)) {
drm_dbg_kms(&dev_priv->drm, "FDI train 1 done.\n");
intel_de_write(dev_priv, reg, temp | FDI_RX_BIT_LOCK);
break;
}
}
if (tries == 5)
drm_err(&dev_priv->drm, "FDI train 1 fail!\n");
/* Train 2 */
reg = FDI_TX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_2;
intel_de_write(dev_priv, reg, temp);
reg = FDI_RX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_2;
intel_de_write(dev_priv, reg, temp);
intel_de_posting_read(dev_priv, reg);
udelay(150);
reg = FDI_RX_IIR(pipe);
for (tries = 0; tries < 5; tries++) {
temp = intel_de_read(dev_priv, reg);
drm_dbg_kms(&dev_priv->drm, "FDI_RX_IIR 0x%x\n", temp);
if (temp & FDI_RX_SYMBOL_LOCK) {
intel_de_write(dev_priv, reg,
temp | FDI_RX_SYMBOL_LOCK);
drm_dbg_kms(&dev_priv->drm, "FDI train 2 done.\n");
break;
}
}
if (tries == 5)
drm_err(&dev_priv->drm, "FDI train 2 fail!\n");
drm_dbg_kms(&dev_priv->drm, "FDI train done\n");
}
static const int snb_b_fdi_train_param[] = {
FDI_LINK_TRAIN_400MV_0DB_SNB_B,
FDI_LINK_TRAIN_400MV_6DB_SNB_B,
FDI_LINK_TRAIN_600MV_3_5DB_SNB_B,
FDI_LINK_TRAIN_800MV_0DB_SNB_B,
};
/* The FDI link training functions for SNB/Cougarpoint. */
static void gen6_fdi_link_train(struct intel_crtc *crtc,
const struct intel_crtc_state *crtc_state)
{
struct drm_device *dev = crtc->base.dev;
struct drm_i915_private *dev_priv = to_i915(dev);
enum pipe pipe = crtc->pipe;
i915_reg_t reg;
u32 temp, i, retry;
/* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
for train result */
reg = FDI_RX_IMR(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_RX_SYMBOL_LOCK;
temp &= ~FDI_RX_BIT_LOCK;
intel_de_write(dev_priv, reg, temp);
intel_de_posting_read(dev_priv, reg);
udelay(150);
/* enable CPU FDI TX and PCH FDI RX */
reg = FDI_TX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_DP_PORT_WIDTH_MASK;
temp |= FDI_DP_PORT_WIDTH(crtc_state->fdi_lanes);
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_1;
temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
/* SNB-B */
temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
intel_de_write(dev_priv, reg, temp | FDI_TX_ENABLE);
intel_de_write(dev_priv, FDI_RX_MISC(pipe),
FDI_RX_TP1_TO_TP2_48 | FDI_RX_FDI_DELAY_90);
reg = FDI_RX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
if (HAS_PCH_CPT(dev_priv)) {
temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
} else {
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_1;
}
intel_de_write(dev_priv, reg, temp | FDI_RX_ENABLE);
intel_de_posting_read(dev_priv, reg);
udelay(150);
for (i = 0; i < 4; i++) {
reg = FDI_TX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
temp |= snb_b_fdi_train_param[i];
intel_de_write(dev_priv, reg, temp);
intel_de_posting_read(dev_priv, reg);
udelay(500);
for (retry = 0; retry < 5; retry++) {
reg = FDI_RX_IIR(pipe);
temp = intel_de_read(dev_priv, reg);
drm_dbg_kms(&dev_priv->drm, "FDI_RX_IIR 0x%x\n", temp);
if (temp & FDI_RX_BIT_LOCK) {
intel_de_write(dev_priv, reg,
temp | FDI_RX_BIT_LOCK);
drm_dbg_kms(&dev_priv->drm,
"FDI train 1 done.\n");
break;
}
udelay(50);
}
if (retry < 5)
break;
}
if (i == 4)
drm_err(&dev_priv->drm, "FDI train 1 fail!\n");
/* Train 2 */
reg = FDI_TX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_2;
if (IS_GEN(dev_priv, 6)) {
temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
/* SNB-B */
temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
}
intel_de_write(dev_priv, reg, temp);
reg = FDI_RX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
if (HAS_PCH_CPT(dev_priv)) {
temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
temp |= FDI_LINK_TRAIN_PATTERN_2_CPT;
} else {
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_2;
}
intel_de_write(dev_priv, reg, temp);
intel_de_posting_read(dev_priv, reg);
udelay(150);
for (i = 0; i < 4; i++) {
reg = FDI_TX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
temp |= snb_b_fdi_train_param[i];
intel_de_write(dev_priv, reg, temp);
intel_de_posting_read(dev_priv, reg);
udelay(500);
for (retry = 0; retry < 5; retry++) {
reg = FDI_RX_IIR(pipe);
temp = intel_de_read(dev_priv, reg);
drm_dbg_kms(&dev_priv->drm, "FDI_RX_IIR 0x%x\n", temp);
if (temp & FDI_RX_SYMBOL_LOCK) {
intel_de_write(dev_priv, reg,
temp | FDI_RX_SYMBOL_LOCK);
drm_dbg_kms(&dev_priv->drm,
"FDI train 2 done.\n");
break;
}
udelay(50);
}
if (retry < 5)
break;
}
if (i == 4)
drm_err(&dev_priv->drm, "FDI train 2 fail!\n");
drm_dbg_kms(&dev_priv->drm, "FDI train done.\n");
}
/* Manual link training for Ivy Bridge A0 parts */
static void ivb_manual_fdi_link_train(struct intel_crtc *crtc,
const struct intel_crtc_state *crtc_state)
{
struct drm_device *dev = crtc->base.dev;
struct drm_i915_private *dev_priv = to_i915(dev);
enum pipe pipe = crtc->pipe;
i915_reg_t reg;
u32 temp, i, j;
/* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
for train result */
reg = FDI_RX_IMR(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_RX_SYMBOL_LOCK;
temp &= ~FDI_RX_BIT_LOCK;
intel_de_write(dev_priv, reg, temp);
intel_de_posting_read(dev_priv, reg);
udelay(150);
drm_dbg_kms(&dev_priv->drm, "FDI_RX_IIR before link train 0x%x\n",
intel_de_read(dev_priv, FDI_RX_IIR(pipe)));
/* Try each vswing and preemphasis setting twice before moving on */
for (j = 0; j < ARRAY_SIZE(snb_b_fdi_train_param) * 2; j++) {
/* disable first in case we need to retry */
reg = FDI_TX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~(FDI_LINK_TRAIN_AUTO | FDI_LINK_TRAIN_NONE_IVB);
temp &= ~FDI_TX_ENABLE;
intel_de_write(dev_priv, reg, temp);
reg = FDI_RX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_LINK_TRAIN_AUTO;
temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
temp &= ~FDI_RX_ENABLE;
intel_de_write(dev_priv, reg, temp);
/* enable CPU FDI TX and PCH FDI RX */
reg = FDI_TX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_DP_PORT_WIDTH_MASK;
temp |= FDI_DP_PORT_WIDTH(crtc_state->fdi_lanes);
temp |= FDI_LINK_TRAIN_PATTERN_1_IVB;
temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
temp |= snb_b_fdi_train_param[j/2];
temp |= FDI_COMPOSITE_SYNC;
intel_de_write(dev_priv, reg, temp | FDI_TX_ENABLE);
intel_de_write(dev_priv, FDI_RX_MISC(pipe),
FDI_RX_TP1_TO_TP2_48 | FDI_RX_FDI_DELAY_90);
reg = FDI_RX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
temp |= FDI_COMPOSITE_SYNC;
intel_de_write(dev_priv, reg, temp | FDI_RX_ENABLE);
intel_de_posting_read(dev_priv, reg);
udelay(1); /* should be 0.5us */
for (i = 0; i < 4; i++) {
reg = FDI_RX_IIR(pipe);
temp = intel_de_read(dev_priv, reg);
drm_dbg_kms(&dev_priv->drm, "FDI_RX_IIR 0x%x\n", temp);
if (temp & FDI_RX_BIT_LOCK ||
(intel_de_read(dev_priv, reg) & FDI_RX_BIT_LOCK)) {
intel_de_write(dev_priv, reg,
temp | FDI_RX_BIT_LOCK);
drm_dbg_kms(&dev_priv->drm,
"FDI train 1 done, level %i.\n",
i);
break;
}
udelay(1); /* should be 0.5us */
}
if (i == 4) {
drm_dbg_kms(&dev_priv->drm,
"FDI train 1 fail on vswing %d\n", j / 2);
continue;
}
/* Train 2 */
reg = FDI_TX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_LINK_TRAIN_NONE_IVB;
temp |= FDI_LINK_TRAIN_PATTERN_2_IVB;
intel_de_write(dev_priv, reg, temp);
reg = FDI_RX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
temp |= FDI_LINK_TRAIN_PATTERN_2_CPT;
intel_de_write(dev_priv, reg, temp);
intel_de_posting_read(dev_priv, reg);
udelay(2); /* should be 1.5us */
for (i = 0; i < 4; i++) {
reg = FDI_RX_IIR(pipe);
temp = intel_de_read(dev_priv, reg);
drm_dbg_kms(&dev_priv->drm, "FDI_RX_IIR 0x%x\n", temp);
if (temp & FDI_RX_SYMBOL_LOCK ||
(intel_de_read(dev_priv, reg) & FDI_RX_SYMBOL_LOCK)) {
intel_de_write(dev_priv, reg,
temp | FDI_RX_SYMBOL_LOCK);
drm_dbg_kms(&dev_priv->drm,
"FDI train 2 done, level %i.\n",
i);
goto train_done;
}
udelay(2); /* should be 1.5us */
}
if (i == 4)
drm_dbg_kms(&dev_priv->drm,
"FDI train 2 fail on vswing %d\n", j / 2);
}
train_done:
drm_dbg_kms(&dev_priv->drm, "FDI train done.\n");
}
static void ilk_fdi_pll_enable(const struct intel_crtc_state *crtc_state)
{
struct intel_crtc *intel_crtc = to_intel_crtc(crtc_state->uapi.crtc);
struct drm_i915_private *dev_priv = to_i915(intel_crtc->base.dev);
enum pipe pipe = intel_crtc->pipe;
i915_reg_t reg;
u32 temp;
/* enable PCH FDI RX PLL, wait warmup plus DMI latency */
reg = FDI_RX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~(FDI_DP_PORT_WIDTH_MASK | (0x7 << 16));
temp |= FDI_DP_PORT_WIDTH(crtc_state->fdi_lanes);
temp |= (intel_de_read(dev_priv, PIPECONF(pipe)) & PIPECONF_BPC_MASK) << 11;
intel_de_write(dev_priv, reg, temp | FDI_RX_PLL_ENABLE);
intel_de_posting_read(dev_priv, reg);
udelay(200);
/* Switch from Rawclk to PCDclk */
temp = intel_de_read(dev_priv, reg);
intel_de_write(dev_priv, reg, temp | FDI_PCDCLK);
intel_de_posting_read(dev_priv, reg);
udelay(200);
/* Enable CPU FDI TX PLL, always on for Ironlake */
reg = FDI_TX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
if ((temp & FDI_TX_PLL_ENABLE) == 0) {
intel_de_write(dev_priv, reg, temp | FDI_TX_PLL_ENABLE);
intel_de_posting_read(dev_priv, reg);
udelay(100);
}
}
static void ilk_fdi_pll_disable(struct intel_crtc *intel_crtc)
{
struct drm_device *dev = intel_crtc->base.dev;
struct drm_i915_private *dev_priv = to_i915(dev);
enum pipe pipe = intel_crtc->pipe;
i915_reg_t reg;
u32 temp;
/* Switch from PCDclk to Rawclk */
reg = FDI_RX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
intel_de_write(dev_priv, reg, temp & ~FDI_PCDCLK);
/* Disable CPU FDI TX PLL */
reg = FDI_TX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
intel_de_write(dev_priv, reg, temp & ~FDI_TX_PLL_ENABLE);
intel_de_posting_read(dev_priv, reg);
udelay(100);
reg = FDI_RX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
intel_de_write(dev_priv, reg, temp & ~FDI_RX_PLL_ENABLE);
/* Wait for the clocks to turn off. */
intel_de_posting_read(dev_priv, reg);
udelay(100);
}
static void ilk_fdi_disable(struct intel_crtc *crtc)
{
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
enum pipe pipe = crtc->pipe;
i915_reg_t reg;
u32 temp;
/* disable CPU FDI tx and PCH FDI rx */
reg = FDI_TX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
intel_de_write(dev_priv, reg, temp & ~FDI_TX_ENABLE);
intel_de_posting_read(dev_priv, reg);
reg = FDI_RX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~(0x7 << 16);
temp |= (intel_de_read(dev_priv, PIPECONF(pipe)) & PIPECONF_BPC_MASK) << 11;
intel_de_write(dev_priv, reg, temp & ~FDI_RX_ENABLE);
intel_de_posting_read(dev_priv, reg);
udelay(100);
/* Ironlake workaround, disable clock pointer after downing FDI */
if (HAS_PCH_IBX(dev_priv))
intel_de_write(dev_priv, FDI_RX_CHICKEN(pipe),
FDI_RX_PHASE_SYNC_POINTER_OVR);
/* still set train pattern 1 */
reg = FDI_TX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_1;
intel_de_write(dev_priv, reg, temp);
reg = FDI_RX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
if (HAS_PCH_CPT(dev_priv)) {
temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
} else {
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_1;
}
/* BPC in FDI rx is consistent with that in PIPECONF */
temp &= ~(0x07 << 16);
temp |= (intel_de_read(dev_priv, PIPECONF(pipe)) & PIPECONF_BPC_MASK) << 11;
intel_de_write(dev_priv, reg, temp);
intel_de_posting_read(dev_priv, reg);
udelay(100);
}
bool intel_has_pending_fb_unpin(struct drm_i915_private *dev_priv)
{
struct drm_crtc *crtc;
@ -6659,143 +6124,6 @@ static void intel_connector_verify_state(struct intel_crtc_state *crtc_state,
}
}
static int pipe_required_fdi_lanes(struct intel_crtc_state *crtc_state)
{
if (crtc_state->hw.enable && crtc_state->has_pch_encoder)
return crtc_state->fdi_lanes;
return 0;
}
static int ilk_check_fdi_lanes(struct drm_device *dev, enum pipe pipe,
struct intel_crtc_state *pipe_config)
{
struct drm_i915_private *dev_priv = to_i915(dev);
struct drm_atomic_state *state = pipe_config->uapi.state;
struct intel_crtc *other_crtc;
struct intel_crtc_state *other_crtc_state;
drm_dbg_kms(&dev_priv->drm,
"checking fdi config on pipe %c, lanes %i\n",
pipe_name(pipe), pipe_config->fdi_lanes);
if (pipe_config->fdi_lanes > 4) {
drm_dbg_kms(&dev_priv->drm,
"invalid fdi lane config on pipe %c: %i lanes\n",
pipe_name(pipe), pipe_config->fdi_lanes);
return -EINVAL;
}
if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
if (pipe_config->fdi_lanes > 2) {
drm_dbg_kms(&dev_priv->drm,
"only 2 lanes on haswell, required: %i lanes\n",
pipe_config->fdi_lanes);
return -EINVAL;
} else {
return 0;
}
}
if (INTEL_NUM_PIPES(dev_priv) == 2)
return 0;
/* Ivybridge 3 pipe is really complicated */
switch (pipe) {
case PIPE_A:
return 0;
case PIPE_B:
if (pipe_config->fdi_lanes <= 2)
return 0;
other_crtc = intel_get_crtc_for_pipe(dev_priv, PIPE_C);
other_crtc_state =
intel_atomic_get_crtc_state(state, other_crtc);
if (IS_ERR(other_crtc_state))
return PTR_ERR(other_crtc_state);
if (pipe_required_fdi_lanes(other_crtc_state) > 0) {
drm_dbg_kms(&dev_priv->drm,
"invalid shared fdi lane config on pipe %c: %i lanes\n",
pipe_name(pipe), pipe_config->fdi_lanes);
return -EINVAL;
}
return 0;
case PIPE_C:
if (pipe_config->fdi_lanes > 2) {
drm_dbg_kms(&dev_priv->drm,
"only 2 lanes on pipe %c: required %i lanes\n",
pipe_name(pipe), pipe_config->fdi_lanes);
return -EINVAL;
}
other_crtc = intel_get_crtc_for_pipe(dev_priv, PIPE_B);
other_crtc_state =
intel_atomic_get_crtc_state(state, other_crtc);
if (IS_ERR(other_crtc_state))
return PTR_ERR(other_crtc_state);
if (pipe_required_fdi_lanes(other_crtc_state) > 2) {
drm_dbg_kms(&dev_priv->drm,
"fdi link B uses too many lanes to enable link C\n");
return -EINVAL;
}
return 0;
default:
BUG();
}
}
#define RETRY 1
static int ilk_fdi_compute_config(struct intel_crtc *intel_crtc,
struct intel_crtc_state *pipe_config)
{
struct drm_device *dev = intel_crtc->base.dev;
struct drm_i915_private *i915 = to_i915(dev);
const struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode;
int lane, link_bw, fdi_dotclock, ret;
bool needs_recompute = false;
retry:
/* FDI is a binary signal running at ~2.7GHz, encoding
* each output octet as 10 bits. The actual frequency
* is stored as a divider into a 100MHz clock, and the
* mode pixel clock is stored in units of 1KHz.
* Hence the bw of each lane in terms of the mode signal
* is:
*/
link_bw = intel_fdi_link_freq(i915, pipe_config);
fdi_dotclock = adjusted_mode->crtc_clock;
lane = ilk_get_lanes_required(fdi_dotclock, link_bw,
pipe_config->pipe_bpp);
pipe_config->fdi_lanes = lane;
intel_link_compute_m_n(pipe_config->pipe_bpp, lane, fdi_dotclock,
link_bw, &pipe_config->fdi_m_n, false, false);
ret = ilk_check_fdi_lanes(dev, intel_crtc->pipe, pipe_config);
if (ret == -EDEADLK)
return ret;
if (ret == -EINVAL && pipe_config->pipe_bpp > 6*3) {
pipe_config->pipe_bpp -= 2*3;
drm_dbg_kms(&i915->drm,
"fdi link bw constraint, reducing pipe bpp to %i\n",
pipe_config->pipe_bpp);
needs_recompute = true;
pipe_config->bw_constrained = true;
goto retry;
}
if (needs_recompute)
return RETRY;
return ret;
}
bool hsw_crtc_state_ips_capable(const struct intel_crtc_state *crtc_state)
{
struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
@ -11320,7 +10648,7 @@ encoder_retry:
return ret;
}
if (ret == RETRY) {
if (ret == I915_DISPLAY_CONFIG_RETRY) {
if (drm_WARN(&i915->drm, !retry,
"loop in pipe configuration computation\n"))
return -EINVAL;
@ -15119,14 +14447,7 @@ void intel_init_display_hooks(struct drm_i915_private *dev_priv)
dev_priv->display.crtc_disable = i9xx_crtc_disable;
}
if (IS_GEN(dev_priv, 5)) {
dev_priv->display.fdi_link_train = ilk_fdi_link_train;
} else if (IS_GEN(dev_priv, 6)) {
dev_priv->display.fdi_link_train = gen6_fdi_link_train;
} else if (IS_IVYBRIDGE(dev_priv)) {
/* FIXME: detect B0+ stepping and use auto training */
dev_priv->display.fdi_link_train = ivb_manual_fdi_link_train;
}
intel_fdi_init_hook(dev_priv);
if (INTEL_GEN(dev_priv) >= 9) {
dev_priv->display.commit_modeset_enables = skl_commit_modeset_enables;

9
drivers/gpu/drm/i915/display/intel_display_types.h
View File

@ -1852,4 +1852,13 @@ static inline u32 i9xx_dpll_compute_fp(struct dpll *dpll)
return dpll->n << 16 | dpll->m1 << 8 | dpll->m2;
}
static inline u32 intel_fdi_link_freq(struct drm_i915_private *dev_priv,
const struct intel_crtc_state *pipe_config)
{
if (HAS_DDI(dev_priv))
return pipe_config->port_clock; /* SPLL */
else
return dev_priv->fdi_pll_freq;
}
#endif /* __INTEL_DISPLAY_TYPES_H__ */

683
drivers/gpu/drm/i915/display/intel_fdi.c Normal file
View File

@ -0,0 +1,683 @@
// SPDX-License-Identifier: MIT
/*
* Copyright © 2020 Intel Corporation
*/
#include "intel_atomic.h"
#include "intel_display_types.h"
#include "intel_fdi.h"
/* units of 100MHz */
static int pipe_required_fdi_lanes(struct intel_crtc_state *crtc_state)
{
if (crtc_state->hw.enable && crtc_state->has_pch_encoder)
return crtc_state->fdi_lanes;
return 0;
}
static int ilk_check_fdi_lanes(struct drm_device *dev, enum pipe pipe,
struct intel_crtc_state *pipe_config)
{
struct drm_i915_private *dev_priv = to_i915(dev);
struct drm_atomic_state *state = pipe_config->uapi.state;
struct intel_crtc *other_crtc;
struct intel_crtc_state *other_crtc_state;
drm_dbg_kms(&dev_priv->drm,
"checking fdi config on pipe %c, lanes %i\n",
pipe_name(pipe), pipe_config->fdi_lanes);
if (pipe_config->fdi_lanes > 4) {
drm_dbg_kms(&dev_priv->drm,
"invalid fdi lane config on pipe %c: %i lanes\n",
pipe_name(pipe), pipe_config->fdi_lanes);
return -EINVAL;
}
if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
if (pipe_config->fdi_lanes > 2) {
drm_dbg_kms(&dev_priv->drm,
"only 2 lanes on haswell, required: %i lanes\n",
pipe_config->fdi_lanes);
return -EINVAL;
} else {
return 0;
}
}
if (INTEL_NUM_PIPES(dev_priv) == 2)
return 0;
/* Ivybridge 3 pipe is really complicated */
switch (pipe) {
case PIPE_A:
return 0;
case PIPE_B:
if (pipe_config->fdi_lanes <= 2)
return 0;
other_crtc = intel_get_crtc_for_pipe(dev_priv, PIPE_C);
other_crtc_state =
intel_atomic_get_crtc_state(state, other_crtc);
if (IS_ERR(other_crtc_state))
return PTR_ERR(other_crtc_state);
if (pipe_required_fdi_lanes(other_crtc_state) > 0) {
drm_dbg_kms(&dev_priv->drm,
"invalid shared fdi lane config on pipe %c: %i lanes\n",
pipe_name(pipe), pipe_config->fdi_lanes);
return -EINVAL;
}
return 0;
case PIPE_C:
if (pipe_config->fdi_lanes > 2) {
drm_dbg_kms(&dev_priv->drm,
"only 2 lanes on pipe %c: required %i lanes\n",
pipe_name(pipe), pipe_config->fdi_lanes);
return -EINVAL;
}
other_crtc = intel_get_crtc_for_pipe(dev_priv, PIPE_B);
other_crtc_state =
intel_atomic_get_crtc_state(state, other_crtc);
if (IS_ERR(other_crtc_state))
return PTR_ERR(other_crtc_state);
if (pipe_required_fdi_lanes(other_crtc_state) > 2) {
drm_dbg_kms(&dev_priv->drm,
"fdi link B uses too many lanes to enable link C\n");
return -EINVAL;
}
return 0;
default:
BUG();
}
}
int ilk_fdi_compute_config(struct intel_crtc *intel_crtc,
struct intel_crtc_state *pipe_config)
{
struct drm_device *dev = intel_crtc->base.dev;
struct drm_i915_private *i915 = to_i915(dev);
const struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode;
int lane, link_bw, fdi_dotclock, ret;
bool needs_recompute = false;
retry:
/* FDI is a binary signal running at ~2.7GHz, encoding
* each output octet as 10 bits. The actual frequency
* is stored as a divider into a 100MHz clock, and the
* mode pixel clock is stored in units of 1KHz.
* Hence the bw of each lane in terms of the mode signal
* is:
*/
link_bw = intel_fdi_link_freq(i915, pipe_config);
fdi_dotclock = adjusted_mode->crtc_clock;
lane = ilk_get_lanes_required(fdi_dotclock, link_bw,
pipe_config->pipe_bpp);
pipe_config->fdi_lanes = lane;
intel_link_compute_m_n(pipe_config->pipe_bpp, lane, fdi_dotclock,
link_bw, &pipe_config->fdi_m_n, false, false);
ret = ilk_check_fdi_lanes(dev, intel_crtc->pipe, pipe_config);
if (ret == -EDEADLK)
return ret;
if (ret == -EINVAL && pipe_config->pipe_bpp > 6*3) {
pipe_config->pipe_bpp -= 2*3;
drm_dbg_kms(&i915->drm,
"fdi link bw constraint, reducing pipe bpp to %i\n",
pipe_config->pipe_bpp);
needs_recompute = true;
pipe_config->bw_constrained = true;
goto retry;
}
if (needs_recompute)
return I915_DISPLAY_CONFIG_RETRY;
return ret;
}
void intel_fdi_normal_train(struct intel_crtc *crtc)
{
struct drm_device *dev = crtc->base.dev;
struct drm_i915_private *dev_priv = to_i915(dev);
enum pipe pipe = crtc->pipe;
i915_reg_t reg;
u32 temp;
/* enable normal train */
reg = FDI_TX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
if (IS_IVYBRIDGE(dev_priv)) {
temp &= ~FDI_LINK_TRAIN_NONE_IVB;
temp |= FDI_LINK_TRAIN_NONE_IVB | FDI_TX_ENHANCE_FRAME_ENABLE;
} else {
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_NONE | FDI_TX_ENHANCE_FRAME_ENABLE;
}
intel_de_write(dev_priv, reg, temp);
reg = FDI_RX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
if (HAS_PCH_CPT(dev_priv)) {
temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
temp |= FDI_LINK_TRAIN_NORMAL_CPT;
} else {
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_NONE;
}
intel_de_write(dev_priv, reg, temp | FDI_RX_ENHANCE_FRAME_ENABLE);
/* wait one idle pattern time */
intel_de_posting_read(dev_priv, reg);
udelay(1000);
/* IVB wants error correction enabled */
if (IS_IVYBRIDGE(dev_priv))
intel_de_write(dev_priv, reg,
intel_de_read(dev_priv, reg) | FDI_FS_ERRC_ENABLE | FDI_FE_ERRC_ENABLE);
}
/* The FDI link training functions for ILK/Ibexpeak. */
static void ilk_fdi_link_train(struct intel_crtc *crtc,
const struct intel_crtc_state *crtc_state)
{
struct drm_device *dev = crtc->base.dev;
struct drm_i915_private *dev_priv = to_i915(dev);
enum pipe pipe = crtc->pipe;
i915_reg_t reg;
u32 temp, tries;
/* FDI needs bits from pipe first */
assert_pipe_enabled(dev_priv, crtc_state->cpu_transcoder);
/* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
for train result */
reg = FDI_RX_IMR(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_RX_SYMBOL_LOCK;
temp &= ~FDI_RX_BIT_LOCK;
intel_de_write(dev_priv, reg, temp);
intel_de_read(dev_priv, reg);
udelay(150);
/* enable CPU FDI TX and PCH FDI RX */
reg = FDI_TX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_DP_PORT_WIDTH_MASK;
temp |= FDI_DP_PORT_WIDTH(crtc_state->fdi_lanes);
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_1;
intel_de_write(dev_priv, reg, temp | FDI_TX_ENABLE);
reg = FDI_RX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_1;
intel_de_write(dev_priv, reg, temp | FDI_RX_ENABLE);
intel_de_posting_read(dev_priv, reg);
udelay(150);
/* Ironlake workaround, enable clock pointer after FDI enable*/
intel_de_write(dev_priv, FDI_RX_CHICKEN(pipe),
FDI_RX_PHASE_SYNC_POINTER_OVR);
intel_de_write(dev_priv, FDI_RX_CHICKEN(pipe),
FDI_RX_PHASE_SYNC_POINTER_OVR | FDI_RX_PHASE_SYNC_POINTER_EN);
reg = FDI_RX_IIR(pipe);
for (tries = 0; tries < 5; tries++) {
temp = intel_de_read(dev_priv, reg);
drm_dbg_kms(&dev_priv->drm, "FDI_RX_IIR 0x%x\n", temp);
if ((temp & FDI_RX_BIT_LOCK)) {
drm_dbg_kms(&dev_priv->drm, "FDI train 1 done.\n");
intel_de_write(dev_priv, reg, temp | FDI_RX_BIT_LOCK);
break;
}
}
if (tries == 5)
drm_err(&dev_priv->drm, "FDI train 1 fail!\n");
/* Train 2 */
reg = FDI_TX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_2;
intel_de_write(dev_priv, reg, temp);
reg = FDI_RX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_2;
intel_de_write(dev_priv, reg, temp);
intel_de_posting_read(dev_priv, reg);
udelay(150);
reg = FDI_RX_IIR(pipe);
for (tries = 0; tries < 5; tries++) {
temp = intel_de_read(dev_priv, reg);
drm_dbg_kms(&dev_priv->drm, "FDI_RX_IIR 0x%x\n", temp);
if (temp & FDI_RX_SYMBOL_LOCK) {
intel_de_write(dev_priv, reg,
temp | FDI_RX_SYMBOL_LOCK);
drm_dbg_kms(&dev_priv->drm, "FDI train 2 done.\n");
break;
}
}
if (tries == 5)
drm_err(&dev_priv->drm, "FDI train 2 fail!\n");
drm_dbg_kms(&dev_priv->drm, "FDI train done\n");
}
static const int snb_b_fdi_train_param[] = {
FDI_LINK_TRAIN_400MV_0DB_SNB_B,
FDI_LINK_TRAIN_400MV_6DB_SNB_B,
FDI_LINK_TRAIN_600MV_3_5DB_SNB_B,
FDI_LINK_TRAIN_800MV_0DB_SNB_B,
};
/* The FDI link training functions for SNB/Cougarpoint. */
static void gen6_fdi_link_train(struct intel_crtc *crtc,
const struct intel_crtc_state *crtc_state)
{
struct drm_device *dev = crtc->base.dev;
struct drm_i915_private *dev_priv = to_i915(dev);
enum pipe pipe = crtc->pipe;
i915_reg_t reg;
u32 temp, i, retry;
/* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
for train result */
reg = FDI_RX_IMR(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_RX_SYMBOL_LOCK;
temp &= ~FDI_RX_BIT_LOCK;
intel_de_write(dev_priv, reg, temp);
intel_de_posting_read(dev_priv, reg);
udelay(150);
/* enable CPU FDI TX and PCH FDI RX */
reg = FDI_TX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_DP_PORT_WIDTH_MASK;
temp |= FDI_DP_PORT_WIDTH(crtc_state->fdi_lanes);
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_1;
temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
/* SNB-B */
temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
intel_de_write(dev_priv, reg, temp | FDI_TX_ENABLE);
intel_de_write(dev_priv, FDI_RX_MISC(pipe),
FDI_RX_TP1_TO_TP2_48 | FDI_RX_FDI_DELAY_90);
reg = FDI_RX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
if (HAS_PCH_CPT(dev_priv)) {
temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
} else {
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_1;
}
intel_de_write(dev_priv, reg, temp | FDI_RX_ENABLE);
intel_de_posting_read(dev_priv, reg);
udelay(150);
for (i = 0; i < 4; i++) {
reg = FDI_TX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
temp |= snb_b_fdi_train_param[i];
intel_de_write(dev_priv, reg, temp);
intel_de_posting_read(dev_priv, reg);
udelay(500);
for (retry = 0; retry < 5; retry++) {
reg = FDI_RX_IIR(pipe);
temp = intel_de_read(dev_priv, reg);
drm_dbg_kms(&dev_priv->drm, "FDI_RX_IIR 0x%x\n", temp);
if (temp & FDI_RX_BIT_LOCK) {
intel_de_write(dev_priv, reg,
temp | FDI_RX_BIT_LOCK);
drm_dbg_kms(&dev_priv->drm,
"FDI train 1 done.\n");
break;
}
udelay(50);
}
if (retry < 5)
break;
}
if (i == 4)
drm_err(&dev_priv->drm, "FDI train 1 fail!\n");
/* Train 2 */
reg = FDI_TX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_2;
if (IS_GEN(dev_priv, 6)) {
temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
/* SNB-B */
temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
}
intel_de_write(dev_priv, reg, temp);
reg = FDI_RX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
if (HAS_PCH_CPT(dev_priv)) {
temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
temp |= FDI_LINK_TRAIN_PATTERN_2_CPT;
} else {
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_2;
}
intel_de_write(dev_priv, reg, temp);
intel_de_posting_read(dev_priv, reg);
udelay(150);
for (i = 0; i < 4; i++) {
reg = FDI_TX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
temp |= snb_b_fdi_train_param[i];
intel_de_write(dev_priv, reg, temp);
intel_de_posting_read(dev_priv, reg);
udelay(500);
for (retry = 0; retry < 5; retry++) {
reg = FDI_RX_IIR(pipe);
temp = intel_de_read(dev_priv, reg);
drm_dbg_kms(&dev_priv->drm, "FDI_RX_IIR 0x%x\n", temp);
if (temp & FDI_RX_SYMBOL_LOCK) {
intel_de_write(dev_priv, reg,
temp | FDI_RX_SYMBOL_LOCK);
drm_dbg_kms(&dev_priv->drm,
"FDI train 2 done.\n");
break;
}
udelay(50);
}
if (retry < 5)
break;
}
if (i == 4)
drm_err(&dev_priv->drm, "FDI train 2 fail!\n");
drm_dbg_kms(&dev_priv->drm, "FDI train done.\n");
}
/* Manual link training for Ivy Bridge A0 parts */
static void ivb_manual_fdi_link_train(struct intel_crtc *crtc,
const struct intel_crtc_state *crtc_state)
{
struct drm_device *dev = crtc->base.dev;
struct drm_i915_private *dev_priv = to_i915(dev);
enum pipe pipe = crtc->pipe;
i915_reg_t reg;
u32 temp, i, j;
/* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
for train result */
reg = FDI_RX_IMR(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_RX_SYMBOL_LOCK;
temp &= ~FDI_RX_BIT_LOCK;
intel_de_write(dev_priv, reg, temp);
intel_de_posting_read(dev_priv, reg);
udelay(150);
drm_dbg_kms(&dev_priv->drm, "FDI_RX_IIR before link train 0x%x\n",
intel_de_read(dev_priv, FDI_RX_IIR(pipe)));
/* Try each vswing and preemphasis setting twice before moving on */
for (j = 0; j < ARRAY_SIZE(snb_b_fdi_train_param) * 2; j++) {
/* disable first in case we need to retry */
reg = FDI_TX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~(FDI_LINK_TRAIN_AUTO | FDI_LINK_TRAIN_NONE_IVB);
temp &= ~FDI_TX_ENABLE;
intel_de_write(dev_priv, reg, temp);
reg = FDI_RX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_LINK_TRAIN_AUTO;
temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
temp &= ~FDI_RX_ENABLE;
intel_de_write(dev_priv, reg, temp);
/* enable CPU FDI TX and PCH FDI RX */
reg = FDI_TX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_DP_PORT_WIDTH_MASK;
temp |= FDI_DP_PORT_WIDTH(crtc_state->fdi_lanes);
temp |= FDI_LINK_TRAIN_PATTERN_1_IVB;
temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
temp |= snb_b_fdi_train_param[j/2];
temp |= FDI_COMPOSITE_SYNC;
intel_de_write(dev_priv, reg, temp | FDI_TX_ENABLE);
intel_de_write(dev_priv, FDI_RX_MISC(pipe),
FDI_RX_TP1_TO_TP2_48 | FDI_RX_FDI_DELAY_90);
reg = FDI_RX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
temp |= FDI_COMPOSITE_SYNC;
intel_de_write(dev_priv, reg, temp | FDI_RX_ENABLE);
intel_de_posting_read(dev_priv, reg);
udelay(1); /* should be 0.5us */
for (i = 0; i < 4; i++) {
reg = FDI_RX_IIR(pipe);
temp = intel_de_read(dev_priv, reg);
drm_dbg_kms(&dev_priv->drm, "FDI_RX_IIR 0x%x\n", temp);
if (temp & FDI_RX_BIT_LOCK ||
(intel_de_read(dev_priv, reg) & FDI_RX_BIT_LOCK)) {
intel_de_write(dev_priv, reg,
temp | FDI_RX_BIT_LOCK);
drm_dbg_kms(&dev_priv->drm,
"FDI train 1 done, level %i.\n",
i);
break;
}
udelay(1); /* should be 0.5us */
}
if (i == 4) {
drm_dbg_kms(&dev_priv->drm,
"FDI train 1 fail on vswing %d\n", j / 2);
continue;
}
/* Train 2 */
reg = FDI_TX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_LINK_TRAIN_NONE_IVB;
temp |= FDI_LINK_TRAIN_PATTERN_2_IVB;
intel_de_write(dev_priv, reg, temp);
reg = FDI_RX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
temp |= FDI_LINK_TRAIN_PATTERN_2_CPT;
intel_de_write(dev_priv, reg, temp);
intel_de_posting_read(dev_priv, reg);
udelay(2); /* should be 1.5us */
for (i = 0; i < 4; i++) {
reg = FDI_RX_IIR(pipe);
temp = intel_de_read(dev_priv, reg);
drm_dbg_kms(&dev_priv->drm, "FDI_RX_IIR 0x%x\n", temp);
if (temp & FDI_RX_SYMBOL_LOCK ||
(intel_de_read(dev_priv, reg) & FDI_RX_SYMBOL_LOCK)) {
intel_de_write(dev_priv, reg,
temp | FDI_RX_SYMBOL_LOCK);
drm_dbg_kms(&dev_priv->drm,
"FDI train 2 done, level %i.\n",
i);
goto train_done;
}
udelay(2); /* should be 1.5us */
}
if (i == 4)
drm_dbg_kms(&dev_priv->drm,
"FDI train 2 fail on vswing %d\n", j / 2);
}
train_done:
drm_dbg_kms(&dev_priv->drm, "FDI train done.\n");
}
void ilk_fdi_pll_enable(const struct intel_crtc_state *crtc_state)
{
struct intel_crtc *intel_crtc = to_intel_crtc(crtc_state->uapi.crtc);
struct drm_i915_private *dev_priv = to_i915(intel_crtc->base.dev);
enum pipe pipe = intel_crtc->pipe;
i915_reg_t reg;
u32 temp;
/* enable PCH FDI RX PLL, wait warmup plus DMI latency */
reg = FDI_RX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~(FDI_DP_PORT_WIDTH_MASK | (0x7 << 16));
temp |= FDI_DP_PORT_WIDTH(crtc_state->fdi_lanes);
temp |= (intel_de_read(dev_priv, PIPECONF(pipe)) & PIPECONF_BPC_MASK) << 11;
intel_de_write(dev_priv, reg, temp | FDI_RX_PLL_ENABLE);
intel_de_posting_read(dev_priv, reg);
udelay(200);
/* Switch from Rawclk to PCDclk */
temp = intel_de_read(dev_priv, reg);
intel_de_write(dev_priv, reg, temp | FDI_PCDCLK);
intel_de_posting_read(dev_priv, reg);
udelay(200);
/* Enable CPU FDI TX PLL, always on for Ironlake */
reg = FDI_TX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
if ((temp & FDI_TX_PLL_ENABLE) == 0) {
intel_de_write(dev_priv, reg, temp | FDI_TX_PLL_ENABLE);
intel_de_posting_read(dev_priv, reg);
udelay(100);
}
}
void ilk_fdi_pll_disable(struct intel_crtc *intel_crtc)
{
struct drm_device *dev = intel_crtc->base.dev;
struct drm_i915_private *dev_priv = to_i915(dev);
enum pipe pipe = intel_crtc->pipe;
i915_reg_t reg;
u32 temp;
/* Switch from PCDclk to Rawclk */
reg = FDI_RX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
intel_de_write(dev_priv, reg, temp & ~FDI_PCDCLK);
/* Disable CPU FDI TX PLL */
reg = FDI_TX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
intel_de_write(dev_priv, reg, temp & ~FDI_TX_PLL_ENABLE);
intel_de_posting_read(dev_priv, reg);
udelay(100);
reg = FDI_RX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
intel_de_write(dev_priv, reg, temp & ~FDI_RX_PLL_ENABLE);
/* Wait for the clocks to turn off. */
intel_de_posting_read(dev_priv, reg);
udelay(100);
}
void ilk_fdi_disable(struct intel_crtc *crtc)
{
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
enum pipe pipe = crtc->pipe;
i915_reg_t reg;
u32 temp;
/* disable CPU FDI tx and PCH FDI rx */
reg = FDI_TX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
intel_de_write(dev_priv, reg, temp & ~FDI_TX_ENABLE);
intel_de_posting_read(dev_priv, reg);
reg = FDI_RX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~(0x7 << 16);
temp |= (intel_de_read(dev_priv, PIPECONF(pipe)) & PIPECONF_BPC_MASK) << 11;
intel_de_write(dev_priv, reg, temp & ~FDI_RX_ENABLE);
intel_de_posting_read(dev_priv, reg);
udelay(100);
/* Ironlake workaround, disable clock pointer after downing FDI */
if (HAS_PCH_IBX(dev_priv))
intel_de_write(dev_priv, FDI_RX_CHICKEN(pipe),
FDI_RX_PHASE_SYNC_POINTER_OVR);
/* still set train pattern 1 */
reg = FDI_TX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_1;
intel_de_write(dev_priv, reg, temp);
reg = FDI_RX_CTL(pipe);
temp = intel_de_read(dev_priv, reg);
if (HAS_PCH_CPT(dev_priv)) {
temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
} else {
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_1;
}
/* BPC in FDI rx is consistent with that in PIPECONF */
temp &= ~(0x07 << 16);
temp |= (intel_de_read(dev_priv, PIPECONF(pipe)) & PIPECONF_BPC_MASK) << 11;
intel_de_write(dev_priv, reg, temp);
intel_de_posting_read(dev_priv, reg);
udelay(100);
}
void
intel_fdi_init_hook(struct drm_i915_private *dev_priv)
{
if (IS_GEN(dev_priv, 5)) {
dev_priv->display.fdi_link_train = ilk_fdi_link_train;
} else if (IS_GEN(dev_priv, 6)) {
dev_priv->display.fdi_link_train = gen6_fdi_link_train;
} else if (IS_IVYBRIDGE(dev_priv)) {
/* FIXME: detect B0+ stepping and use auto training */
dev_priv->display.fdi_link_train = ivb_manual_fdi_link_train;
}
}

22
drivers/gpu/drm/i915/display/intel_fdi.h Normal file
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@ -0,0 +1,22 @@
/* SPDX-License-Identifier: MIT */
/*
* Copyright © 2020 Intel Corporation
*/
#ifndef _INTEL_FDI_H_
#define _INTEL_FDI_H_
struct drm_i915_private;
struct intel_crtc;
struct intel_crtc_state;
#define I915_DISPLAY_CONFIG_RETRY 1
int ilk_fdi_compute_config(struct intel_crtc *intel_crtc,
struct intel_crtc_state *pipe_config);
void intel_fdi_normal_train(struct intel_crtc *crtc);
void ilk_fdi_disable(struct intel_crtc *crtc);
void ilk_fdi_pll_disable(struct intel_crtc *intel_crtc);
void ilk_fdi_pll_enable(const struct intel_crtc_state *crtc_state);
void intel_fdi_init_hook(struct drm_i915_private *dev_priv);
#endif