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drm/i915: Add Display Port support
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Signed-off-by: Keith Packard <keithp@keithp.com>
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Keith Packard committed Jun 18, 2009
1 parent c31c4ba commit a4fc5ed
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Showing 8 changed files with 1,668 additions and 6 deletions.
2 changes: 2 additions & 0 deletions drivers/gpu/drm/i915/Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,8 @@ i915-y := i915_drv.o i915_dma.o i915_irq.o i915_mem.o \
intel_crt.o \
intel_lvds.o \
intel_bios.o \
intel_dp.o \
intel_dp_i2c.o \
intel_hdmi.o \
intel_sdvo.o \
intel_modes.o \
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12 changes: 12 additions & 0 deletions drivers/gpu/drm/i915/i915_drv.h
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Original file line number Diff line number Diff line change
Expand Up @@ -306,6 +306,17 @@ typedef struct drm_i915_private {
u32 saveCURBPOS;
u32 saveCURBBASE;
u32 saveCURSIZE;
u32 saveDP_B;
u32 saveDP_C;
u32 saveDP_D;
u32 savePIPEA_GMCH_DATA_M;
u32 savePIPEB_GMCH_DATA_M;
u32 savePIPEA_GMCH_DATA_N;
u32 savePIPEB_GMCH_DATA_N;
u32 savePIPEA_DP_LINK_M;
u32 savePIPEB_DP_LINK_M;
u32 savePIPEA_DP_LINK_N;
u32 savePIPEB_DP_LINK_N;

struct {
struct drm_mm gtt_space;
Expand Down Expand Up @@ -857,6 +868,7 @@ extern int i915_wait_ring(struct drm_device * dev, int n, const char *caller);
#define HAS_128_BYTE_Y_TILING(dev) (IS_I9XX(dev) && !(IS_I915G(dev) || \
IS_I915GM(dev)))
#define SUPPORTS_INTEGRATED_HDMI(dev) (IS_G4X(dev) || IS_IGDNG(dev))
#define SUPPORTS_INTEGRATED_DP(dev) (IS_G4X(dev) || IS_IGDNG(dev))
#define I915_HAS_HOTPLUG(dev) (IS_I945G(dev) || IS_I945GM(dev) || IS_I965G(dev))

#define PRIMARY_RINGBUFFER_SIZE (128*1024)
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34 changes: 33 additions & 1 deletion drivers/gpu/drm/i915/i915_suspend.c
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Original file line number Diff line number Diff line change
Expand Up @@ -322,6 +322,20 @@ int i915_save_state(struct drm_device *dev)
dev_priv->savePP_OFF_DELAYS = I915_READ(PP_OFF_DELAYS);
dev_priv->savePP_DIVISOR = I915_READ(PP_DIVISOR);

/* Display Port state */
if (SUPPORTS_INTEGRATED_DP(dev)) {
dev_priv->saveDP_B = I915_READ(DP_B);
dev_priv->saveDP_C = I915_READ(DP_C);
dev_priv->saveDP_D = I915_READ(DP_D);
dev_priv->savePIPEA_GMCH_DATA_M = I915_READ(PIPEA_GMCH_DATA_M);
dev_priv->savePIPEB_GMCH_DATA_M = I915_READ(PIPEB_GMCH_DATA_M);
dev_priv->savePIPEA_GMCH_DATA_N = I915_READ(PIPEA_GMCH_DATA_N);
dev_priv->savePIPEB_GMCH_DATA_N = I915_READ(PIPEB_GMCH_DATA_N);
dev_priv->savePIPEA_DP_LINK_M = I915_READ(PIPEA_DP_LINK_M);
dev_priv->savePIPEB_DP_LINK_M = I915_READ(PIPEB_DP_LINK_M);
dev_priv->savePIPEA_DP_LINK_N = I915_READ(PIPEA_DP_LINK_N);
dev_priv->savePIPEB_DP_LINK_N = I915_READ(PIPEB_DP_LINK_N);
}
/* FIXME: save TV & SDVO state */

/* FBC state */
Expand Down Expand Up @@ -404,7 +418,19 @@ int i915_restore_state(struct drm_device *dev)
for (i = 0; i < 8; i++)
I915_WRITE(FENCE_REG_945_8 + (i * 4), dev_priv->saveFENCE[i+8]);
}


/* Display port ratios (must be done before clock is set) */
if (SUPPORTS_INTEGRATED_DP(dev)) {
I915_WRITE(PIPEA_GMCH_DATA_M, dev_priv->savePIPEA_GMCH_DATA_M);
I915_WRITE(PIPEB_GMCH_DATA_M, dev_priv->savePIPEB_GMCH_DATA_M);
I915_WRITE(PIPEA_GMCH_DATA_N, dev_priv->savePIPEA_GMCH_DATA_N);
I915_WRITE(PIPEB_GMCH_DATA_N, dev_priv->savePIPEB_GMCH_DATA_N);
I915_WRITE(PIPEA_DP_LINK_M, dev_priv->savePIPEA_DP_LINK_M);
I915_WRITE(PIPEB_DP_LINK_M, dev_priv->savePIPEB_DP_LINK_M);
I915_WRITE(PIPEA_DP_LINK_N, dev_priv->savePIPEA_DP_LINK_N);
I915_WRITE(PIPEB_DP_LINK_N, dev_priv->savePIPEB_DP_LINK_N);
}

/* Pipe & plane A info */
/* Prime the clock */
if (dev_priv->saveDPLL_A & DPLL_VCO_ENABLE) {
Expand Down Expand Up @@ -518,6 +544,12 @@ int i915_restore_state(struct drm_device *dev)
I915_WRITE(PP_DIVISOR, dev_priv->savePP_DIVISOR);
I915_WRITE(PP_CONTROL, dev_priv->savePP_CONTROL);

/* Display Port state */
if (SUPPORTS_INTEGRATED_DP(dev)) {
I915_WRITE(DP_B, dev_priv->saveDP_B);
I915_WRITE(DP_C, dev_priv->saveDP_C);
I915_WRITE(DP_D, dev_priv->saveDP_D);
}
/* FIXME: restore TV & SDVO state */

/* FBC info */
Expand Down
107 changes: 102 additions & 5 deletions drivers/gpu/drm/i915/intel_display.c
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,7 @@
#include "intel_drv.h"
#include "i915_drm.h"
#include "i915_drv.h"
#include "intel_dp.h"

#include "drm_crtc_helper.h"

Expand Down Expand Up @@ -135,10 +136,11 @@ struct intel_limit {
#define INTEL_LIMIT_G4X_HDMI_DAC 5
#define INTEL_LIMIT_G4X_SINGLE_CHANNEL_LVDS 6
#define INTEL_LIMIT_G4X_DUAL_CHANNEL_LVDS 7
#define INTEL_LIMIT_IGD_SDVO_DAC 8
#define INTEL_LIMIT_IGD_LVDS 9
#define INTEL_LIMIT_IGDNG_SDVO_DAC 10
#define INTEL_LIMIT_IGDNG_LVDS 11
#define INTEL_LIMIT_G4X_DISPLAY_PORT 8
#define INTEL_LIMIT_IGD_SDVO_DAC 9
#define INTEL_LIMIT_IGD_LVDS 10
#define INTEL_LIMIT_IGDNG_SDVO_DAC 11
#define INTEL_LIMIT_IGDNG_LVDS 12

/*The parameter is for SDVO on G4x platform*/
#define G4X_DOT_SDVO_MIN 25000
Expand Down Expand Up @@ -218,6 +220,25 @@ struct intel_limit {
#define G4X_P2_DUAL_CHANNEL_LVDS_FAST 7
#define G4X_P2_DUAL_CHANNEL_LVDS_LIMIT 0

/*The parameter is for DISPLAY PORT on G4x platform*/
#define G4X_DOT_DISPLAY_PORT_MIN 161670
#define G4X_DOT_DISPLAY_PORT_MAX 227000
#define G4X_N_DISPLAY_PORT_MIN 1
#define G4X_N_DISPLAY_PORT_MAX 2
#define G4X_M_DISPLAY_PORT_MIN 97
#define G4X_M_DISPLAY_PORT_MAX 108
#define G4X_M1_DISPLAY_PORT_MIN 0x10
#define G4X_M1_DISPLAY_PORT_MAX 0x12
#define G4X_M2_DISPLAY_PORT_MIN 0x05
#define G4X_M2_DISPLAY_PORT_MAX 0x06
#define G4X_P_DISPLAY_PORT_MIN 10
#define G4X_P_DISPLAY_PORT_MAX 20
#define G4X_P1_DISPLAY_PORT_MIN 1
#define G4X_P1_DISPLAY_PORT_MAX 2
#define G4X_P2_DISPLAY_PORT_SLOW 10
#define G4X_P2_DISPLAY_PORT_FAST 10
#define G4X_P2_DISPLAY_PORT_LIMIT 0

/* IGDNG */
/* as we calculate clock using (register_value + 2) for
N/M1/M2, so here the range value for them is (actual_value-2).
Expand Down Expand Up @@ -256,6 +277,10 @@ static bool
intel_igdng_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
int target, int refclk, intel_clock_t *best_clock);

static bool
intel_find_pll_g4x_dp(const intel_limit_t *, struct drm_crtc *crtc,
int target, int refclk, intel_clock_t *best_clock);

static const intel_limit_t intel_limits[] = {
{ /* INTEL_LIMIT_I8XX_DVO_DAC */
.dot = { .min = I8XX_DOT_MIN, .max = I8XX_DOT_MAX },
Expand Down Expand Up @@ -389,6 +414,28 @@ static const intel_limit_t intel_limits[] = {
},
.find_pll = intel_g4x_find_best_PLL,
},
{ /* INTEL_LIMIT_G4X_DISPLAY_PORT */
.dot = { .min = G4X_DOT_DISPLAY_PORT_MIN,
.max = G4X_DOT_DISPLAY_PORT_MAX },
.vco = { .min = G4X_VCO_MIN,
.max = G4X_VCO_MAX},
.n = { .min = G4X_N_DISPLAY_PORT_MIN,
.max = G4X_N_DISPLAY_PORT_MAX },
.m = { .min = G4X_M_DISPLAY_PORT_MIN,
.max = G4X_M_DISPLAY_PORT_MAX },
.m1 = { .min = G4X_M1_DISPLAY_PORT_MIN,
.max = G4X_M1_DISPLAY_PORT_MAX },
.m2 = { .min = G4X_M2_DISPLAY_PORT_MIN,
.max = G4X_M2_DISPLAY_PORT_MAX },
.p = { .min = G4X_P_DISPLAY_PORT_MIN,
.max = G4X_P_DISPLAY_PORT_MAX },
.p1 = { .min = G4X_P1_DISPLAY_PORT_MIN,
.max = G4X_P1_DISPLAY_PORT_MAX},
.p2 = { .dot_limit = G4X_P2_DISPLAY_PORT_LIMIT,
.p2_slow = G4X_P2_DISPLAY_PORT_SLOW,
.p2_fast = G4X_P2_DISPLAY_PORT_FAST },
.find_pll = intel_find_pll_g4x_dp,
},
{ /* INTEL_LIMIT_IGD_SDVO */
.dot = { .min = I9XX_DOT_MIN, .max = I9XX_DOT_MAX},
.vco = { .min = IGD_VCO_MIN, .max = IGD_VCO_MAX },
Expand Down Expand Up @@ -478,6 +525,8 @@ static const intel_limit_t *intel_g4x_limit(struct drm_crtc *crtc)
limit = &intel_limits[INTEL_LIMIT_G4X_HDMI_DAC];
} else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_SDVO)) {
limit = &intel_limits[INTEL_LIMIT_G4X_SDVO];
} else if (intel_pipe_has_type (crtc, INTEL_OUTPUT_DISPLAYPORT)) {
limit = &intel_limits[INTEL_LIMIT_G4X_DISPLAY_PORT];
} else /* The option is for other outputs */
limit = &intel_limits[INTEL_LIMIT_I9XX_SDVO_DAC];

Expand Down Expand Up @@ -764,6 +813,35 @@ intel_igdng_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
return found;
}

/* DisplayPort has only two frequencies, 162MHz and 270MHz */
static bool
intel_find_pll_g4x_dp(const intel_limit_t *limit, struct drm_crtc *crtc,
int target, int refclk, intel_clock_t *best_clock)
{
intel_clock_t clock;
if (target < 200000) {
clock.dot = 161670;
clock.p = 20;
clock.p1 = 2;
clock.p2 = 10;
clock.n = 0x01;
clock.m = 97;
clock.m1 = 0x10;
clock.m2 = 0x05;
} else {
clock.dot = 270000;
clock.p = 10;
clock.p1 = 1;
clock.p2 = 10;
clock.n = 0x02;
clock.m = 108;
clock.m1 = 0x12;
clock.m2 = 0x06;
}
memcpy(best_clock, &clock, sizeof(intel_clock_t));
return true;
}

void
intel_wait_for_vblank(struct drm_device *dev)
{
Expand Down Expand Up @@ -1541,7 +1619,7 @@ static int intel_crtc_mode_set(struct drm_crtc *crtc,
intel_clock_t clock;
u32 dpll = 0, fp = 0, dspcntr, pipeconf;
bool ok, is_sdvo = false, is_dvo = false;
bool is_crt = false, is_lvds = false, is_tv = false;
bool is_crt = false, is_lvds = false, is_tv = false, is_dp = false;
struct drm_mode_config *mode_config = &dev->mode_config;
struct drm_connector *connector;
const intel_limit_t *limit;
Expand Down Expand Up @@ -1585,6 +1663,9 @@ static int intel_crtc_mode_set(struct drm_crtc *crtc,
case INTEL_OUTPUT_ANALOG:
is_crt = true;
break;
case INTEL_OUTPUT_DISPLAYPORT:
is_dp = true;
break;
}

num_outputs++;
Expand All @@ -1600,6 +1681,7 @@ static int intel_crtc_mode_set(struct drm_crtc *crtc,
} else {
refclk = 48000;
}


/*
* Returns a set of divisors for the desired target clock with the given
Expand Down Expand Up @@ -1662,6 +1744,8 @@ static int intel_crtc_mode_set(struct drm_crtc *crtc,
else if (IS_IGDNG(dev))
dpll |= (sdvo_pixel_multiply - 1) << PLL_REF_SDVO_HDMI_MULTIPLIER_SHIFT;
}
if (is_dp)
dpll |= DPLL_DVO_HIGH_SPEED;

/* compute bitmask from p1 value */
if (IS_IGD(dev))
Expand Down Expand Up @@ -1809,6 +1893,8 @@ static int intel_crtc_mode_set(struct drm_crtc *crtc,
I915_WRITE(lvds_reg, lvds);
I915_READ(lvds_reg);
}
if (is_dp)
intel_dp_set_m_n(crtc, mode, adjusted_mode);

I915_WRITE(fp_reg, fp);
I915_WRITE(dpll_reg, dpll);
Expand Down Expand Up @@ -2475,6 +2561,8 @@ static void intel_setup_outputs(struct drm_device *dev)
found = intel_sdvo_init(dev, SDVOB);
if (!found && SUPPORTS_INTEGRATED_HDMI(dev))
intel_hdmi_init(dev, SDVOB);
if (!found && SUPPORTS_INTEGRATED_DP(dev))
intel_dp_init(dev, DP_B);
}

/* Before G4X SDVOC doesn't have its own detect register */
Expand All @@ -2487,7 +2575,11 @@ static void intel_setup_outputs(struct drm_device *dev)
found = intel_sdvo_init(dev, SDVOC);
if (!found && SUPPORTS_INTEGRATED_HDMI(dev))
intel_hdmi_init(dev, SDVOC);
if (!found && SUPPORTS_INTEGRATED_DP(dev))
intel_dp_init(dev, DP_C);
}
if (SUPPORTS_INTEGRATED_DP(dev) && (I915_READ(DP_D) & DP_DETECTED))
intel_dp_init(dev, DP_D);
} else
intel_dvo_init(dev);

Expand Down Expand Up @@ -2530,6 +2622,11 @@ static void intel_setup_outputs(struct drm_device *dev)
(1 << 1));
clone_mask = (1 << INTEL_OUTPUT_TVOUT);
break;
case INTEL_OUTPUT_DISPLAYPORT:
crtc_mask = ((1 << 0) |
(1 << 1));
clone_mask = (1 << INTEL_OUTPUT_DISPLAYPORT);
break;
}
encoder->possible_crtcs = crtc_mask;
encoder->possible_clones = intel_connector_clones(dev, clone_mask);
Expand Down
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