[Intel-gfx] [PATCH v2 8/9] drm/i915: panel power sequencing for VLV eDP
Daniel Vetter
daniel at ffwll.ch
Thu Sep 27 18:59:01 CEST 2012
On Thu, Sep 27, 2012 at 08:26:15AM -0700, Jesse Barnes wrote:
> On Thu, 27 Sep 2012 19:13:08 +0530
> Vijay Purushothaman <vijay.a.purushothaman at intel.com> wrote:
>
> > PPS register offsets have changed in Valleyview.
> >
> > Signed-off-by: Gajanan Bhat <gajanan.bhat at intel.com>
> > Signed-off-by: Vijay Purushothaman <vijay.a.purushothaman at intel.com>
> > Signed-off-by: Ben Widawsky <benjamin.widawsky at intel.com>
> > ---
> > drivers/gpu/drm/i915/i915_reg.h | 9 +++
> > drivers/gpu/drm/i915/intel_dp.c | 122 +++++++++++++++++++++++++++------------
> > 2 files changed, 93 insertions(+), 38 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> > index 0fe4aad..0e6258a 100644
> > --- a/drivers/gpu/drm/i915/i915_reg.h
> > +++ b/drivers/gpu/drm/i915/i915_reg.h
> > @@ -3977,6 +3977,15 @@
> > #define PIPEB_PP_ON_DELAYS 0x61308
> > #define PIPEB_PP_OFF_DELAYS 0x6130c
> > #define PIPEB_PP_DIVISOR 0x61310
> > +#define VLV_PIPE_PP_STATUS(pipe) _PIPE(pipe, PIPEA_PP_STATUS, PIPEB_PP_STATUS)
> > +#define VLV_PIPE_PP_CONTROL(pipe) _PIPE(pipe, PIPEA_PP_CONTROL, PIPEB_PP_CONTROL)
> > +#define VLV_PIPE_PP_ON_DELAYS(pipe) \
> > + _PIPE(pipe, PIPEA_PP_ON_DELAYS, PIPEB_PP_ON_DELAYS)
> > +#define VLV_PIPE_PP_OFF_DELAYS(pipe) \
> > + _PIPE(pipe, PIPEA_PP_OFF_DELAYS, PIPEB_PP_OFF_DELAYS)
> > +#define VLV_PIPE_PP_DIVISOR(pipe) \
> > + _PIPE(pipe, PIPEA_PP_DIVISOR, PIPEB_PP_DIVISOR)
> > +
> >
> > #define PCH_PP_STATUS 0xc7200
> > #define PCH_PP_CONTROL 0xc7204
> > diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> > index 867c568..c58535b 100644
> > --- a/drivers/gpu/drm/i915/intel_dp.c
> > +++ b/drivers/gpu/drm/i915/intel_dp.c
> > @@ -316,16 +316,20 @@ static bool ironlake_edp_have_panel_power(struct intel_dp *intel_dp)
> > {
> > struct drm_device *dev = intel_dp->base.base.dev;
> > struct drm_i915_private *dev_priv = dev->dev_private;
> > + u32 pp_stat_reg;
> >
> > - return (I915_READ(PCH_PP_STATUS) & PP_ON) != 0;
> > + pp_stat_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_STATUS : PCH_PP_STATUS;
> > + return (I915_READ(pp_stat_reg) & PP_ON) != 0;
> > }
> >
> > static bool ironlake_edp_have_panel_vdd(struct intel_dp *intel_dp)
> > {
> > struct drm_device *dev = intel_dp->base.base.dev;
> > struct drm_i915_private *dev_priv = dev->dev_private;
> > + u32 pp_ctrl_reg;
> >
> > - return (I915_READ(PCH_PP_CONTROL) & EDP_FORCE_VDD) != 0;
> > + pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL;
> > + return (I915_READ(pp_ctrl_reg) & EDP_FORCE_VDD) != 0;
> > }
> >
> > static void
> > @@ -333,14 +337,19 @@ intel_dp_check_edp(struct intel_dp *intel_dp)
> > {
> > struct drm_device *dev = intel_dp->base.base.dev;
> > struct drm_i915_private *dev_priv = dev->dev_private;
> > + u32 pp_stat_reg, pp_ctrl_reg;
> >
> > if (!is_edp(intel_dp))
> > return;
> > +
> > + pp_stat_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_STATUS : PCH_PP_STATUS;
> > + pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL;
> > +
> > if (!ironlake_edp_have_panel_power(intel_dp) && !ironlake_edp_have_panel_vdd(intel_dp)) {
> > WARN(1, "eDP powered off while attempting aux channel communication.\n");
> > DRM_DEBUG_KMS("Status 0x%08x Control 0x%08x\n",
> > - I915_READ(PCH_PP_STATUS),
> > - I915_READ(PCH_PP_CONTROL));
> > + I915_READ(pp_stat_reg),
> > + I915_READ(pp_ctrl_reg));
> > }
> > }
> >
> > @@ -944,16 +953,20 @@ static void ironlake_wait_panel_status(struct intel_dp *intel_dp,
> > {
> > struct drm_device *dev = intel_dp->base.base.dev;
> > struct drm_i915_private *dev_priv = dev->dev_private;
> > + u32 pp_stat_reg, pp_ctrl_reg;
> > +
> > + pp_stat_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_STATUS : PCH_PP_STATUS;
> > + pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL;
> >
> > DRM_DEBUG_KMS("mask %08x value %08x status %08x control %08x\n",
> > - mask, value,
> > - I915_READ(PCH_PP_STATUS),
> > - I915_READ(PCH_PP_CONTROL));
> > + mask, value,
> > + I915_READ(pp_stat_reg),
> > + I915_READ(pp_ctrl_reg));
> >
> > - if (_wait_for((I915_READ(PCH_PP_STATUS) & mask) == value, 5000, 10)) {
> > + if (_wait_for((I915_READ(pp_stat_reg) & mask) == value, 5000, 10)) {
> > DRM_ERROR("Panel status timeout: status %08x control %08x\n",
> > - I915_READ(PCH_PP_STATUS),
> > - I915_READ(PCH_PP_CONTROL));
> > + I915_READ(pp_stat_reg),
> > + I915_READ(pp_ctrl_reg));
> > }
> > }
> >
> > @@ -980,9 +993,15 @@ static void ironlake_wait_panel_power_cycle(struct intel_dp *intel_dp)
> > * is locked
> > */
> >
> > -static u32 ironlake_get_pp_control(struct drm_i915_private *dev_priv)
> > +static u32 ironlake_get_pp_control(struct intel_dp *intel_dp)
> > {
> > - u32 control = I915_READ(PCH_PP_CONTROL);
> > + struct drm_device *dev = intel_dp->base.base.dev;
> > + struct drm_i915_private *dev_priv = dev->dev_private;
> > + u32 control;
> > + u32 pp_ctrl_reg;
> > +
> > + pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL;
> > + control = I915_READ(pp_ctrl_reg);
> >
> > control &= ~PANEL_UNLOCK_MASK;
> > control |= PANEL_UNLOCK_REGS;
> > @@ -994,6 +1013,7 @@ static void ironlake_edp_panel_vdd_on(struct intel_dp *intel_dp)
> > struct drm_device *dev = intel_dp->base.base.dev;
> > struct drm_i915_private *dev_priv = dev->dev_private;
> > u32 pp;
> > + u32 pp_stat_reg, pp_ctrl_reg;
> >
> > if (!is_edp(intel_dp))
> > return;
> > @@ -1012,13 +1032,16 @@ static void ironlake_edp_panel_vdd_on(struct intel_dp *intel_dp)
> > if (!ironlake_edp_have_panel_power(intel_dp))
> > ironlake_wait_panel_power_cycle(intel_dp);
> >
> > - pp = ironlake_get_pp_control(dev_priv);
> > + pp = ironlake_get_pp_control(intel_dp);
> > pp |= EDP_FORCE_VDD;
> > - I915_WRITE(PCH_PP_CONTROL, pp);
> > - POSTING_READ(PCH_PP_CONTROL);
> > - DRM_DEBUG_KMS("PCH_PP_STATUS: 0x%08x PCH_PP_CONTROL: 0x%08x\n",
> > - I915_READ(PCH_PP_STATUS), I915_READ(PCH_PP_CONTROL));
> >
> > + pp_stat_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_STATUS : PCH_PP_STATUS;
> > + pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL;
> > +
> > + I915_WRITE(pp_ctrl_reg, pp);
> > + POSTING_READ(pp_ctrl_reg);
> > + DRM_DEBUG_KMS("PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
> > + I915_READ(pp_stat_reg), I915_READ(pp_ctrl_reg));
> > /*
> > * If the panel wasn't on, delay before accessing aux channel
> > */
> > @@ -1033,17 +1056,21 @@ static void ironlake_panel_vdd_off_sync(struct intel_dp *intel_dp)
> > struct drm_device *dev = intel_dp->base.base.dev;
> > struct drm_i915_private *dev_priv = dev->dev_private;
> > u32 pp;
> > + u32 pp_stat_reg, pp_ctrl_reg;
> >
> > if (!intel_dp->want_panel_vdd && ironlake_edp_have_panel_vdd(intel_dp)) {
> > - pp = ironlake_get_pp_control(dev_priv);
> > + pp = ironlake_get_pp_control(intel_dp);
> > pp &= ~EDP_FORCE_VDD;
> > - I915_WRITE(PCH_PP_CONTROL, pp);
> > - POSTING_READ(PCH_PP_CONTROL);
> >
> > - /* Make sure sequencer is idle before allowing subsequent activity */
> > - DRM_DEBUG_KMS("PCH_PP_STATUS: 0x%08x PCH_PP_CONTROL: 0x%08x\n",
> > - I915_READ(PCH_PP_STATUS), I915_READ(PCH_PP_CONTROL));
> > + pp_stat_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_STATUS : PCH_PP_STATUS;
> > + pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL;
> >
> > + I915_WRITE(pp_ctrl_reg, pp);
> > + POSTING_READ(pp_ctrl_reg);
> > +
> > + /* Make sure sequencer is idle before allowing subsequent activity */
> > + DRM_DEBUG_KMS("PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
> > + I915_READ(pp_stat_reg), I915_READ(pp_ctrl_reg));
> > msleep(intel_dp->panel_power_down_delay);
> > }
> > }
> > @@ -1087,6 +1114,7 @@ static void ironlake_edp_panel_on(struct intel_dp *intel_dp)
> > struct drm_device *dev = intel_dp->base.base.dev;
> > struct drm_i915_private *dev_priv = dev->dev_private;
> > u32 pp;
> > + u32 pp_ctrl_reg;
> >
> > if (!is_edp(intel_dp))
> > return;
> > @@ -1100,7 +1128,7 @@ static void ironlake_edp_panel_on(struct intel_dp *intel_dp)
> >
> > ironlake_wait_panel_power_cycle(intel_dp);
> >
> > - pp = ironlake_get_pp_control(dev_priv);
> > + pp = ironlake_get_pp_control(intel_dp);
> > if (IS_GEN5(dev)) {
> > /* ILK workaround: disable reset around power sequence */
> > pp &= ~PANEL_POWER_RESET;
> > @@ -1112,8 +1140,10 @@ static void ironlake_edp_panel_on(struct intel_dp *intel_dp)
> > if (!IS_GEN5(dev))
> > pp |= PANEL_POWER_RESET;
> >
> > - I915_WRITE(PCH_PP_CONTROL, pp);
> > - POSTING_READ(PCH_PP_CONTROL);
> > + pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL;
> > +
> > + I915_WRITE(pp_ctrl_reg, pp);
> > + POSTING_READ(pp_ctrl_reg);
> >
> > ironlake_wait_panel_on(intel_dp);
> >
> > @@ -1129,6 +1159,7 @@ static void ironlake_edp_panel_off(struct intel_dp *intel_dp)
> > struct drm_device *dev = intel_dp->base.base.dev;
> > struct drm_i915_private *dev_priv = dev->dev_private;
> > u32 pp;
> > + u32 pp_ctrl_reg;
> >
> > if (!is_edp(intel_dp))
> > return;
> > @@ -1137,12 +1168,15 @@ static void ironlake_edp_panel_off(struct intel_dp *intel_dp)
> >
> > WARN(!intel_dp->want_panel_vdd, "Need VDD to turn off panel\n");
> >
> > - pp = ironlake_get_pp_control(dev_priv);
> > + pp = ironlake_get_pp_control(intel_dp);
> > /* We need to switch off panel power _and_ force vdd, for otherwise some
> > * panels get very unhappy and cease to work. */
> > pp &= ~(POWER_TARGET_ON | EDP_FORCE_VDD | PANEL_POWER_RESET | EDP_BLC_ENABLE);
> > - I915_WRITE(PCH_PP_CONTROL, pp);
> > - POSTING_READ(PCH_PP_CONTROL);
> > +
> > + pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL;
> > +
> > + I915_WRITE(pp_ctrl_reg, pp);
> > + POSTING_READ(pp_ctrl_reg);
> >
> > intel_dp->want_panel_vdd = false;
> >
> > @@ -1154,6 +1188,7 @@ static void ironlake_edp_backlight_on(struct intel_dp *intel_dp)
> > struct drm_device *dev = intel_dp->base.base.dev;
> > struct drm_i915_private *dev_priv = dev->dev_private;
> > u32 pp;
> > + u32 pp_ctrl_reg;
> >
> > if (!is_edp(intel_dp))
> > return;
> > @@ -1166,10 +1201,13 @@ static void ironlake_edp_backlight_on(struct intel_dp *intel_dp)
> > * allowing it to appear.
> > */
> > msleep(intel_dp->backlight_on_delay);
> > - pp = ironlake_get_pp_control(dev_priv);
> > + pp = ironlake_get_pp_control(intel_dp);
> > pp |= EDP_BLC_ENABLE;
> > - I915_WRITE(PCH_PP_CONTROL, pp);
> > - POSTING_READ(PCH_PP_CONTROL);
> > +
> > + pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL;
> > +
> > + I915_WRITE(pp_ctrl_reg, pp);
> > + POSTING_READ(pp_ctrl_reg);
> > }
> >
> > static void ironlake_edp_backlight_off(struct intel_dp *intel_dp)
> > @@ -1177,15 +1215,17 @@ static void ironlake_edp_backlight_off(struct intel_dp *intel_dp)
> > struct drm_device *dev = intel_dp->base.base.dev;
> > struct drm_i915_private *dev_priv = dev->dev_private;
> > u32 pp;
> > + u32 pp_ctrl_reg;
> >
> > if (!is_edp(intel_dp))
> > return;
> >
> > DRM_DEBUG_KMS("\n");
> > - pp = ironlake_get_pp_control(dev_priv);
> > + pp = ironlake_get_pp_control(intel_dp);
> > pp &= ~EDP_BLC_ENABLE;
> > - I915_WRITE(PCH_PP_CONTROL, pp);
> > - POSTING_READ(PCH_PP_CONTROL);
> > + pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL;
> > + I915_WRITE(pp_ctrl_reg, pp);
> > + POSTING_READ(pp_ctrl_reg);
> > msleep(intel_dp->backlight_off_delay);
> > }
> >
> > @@ -2547,9 +2587,15 @@ intel_dp_init(struct drm_device *dev, int output_reg, enum port port)
> > u32 pp_on, pp_off, pp_div;
> > struct edid *edid;
> >
> > - pp_on = I915_READ(PCH_PP_ON_DELAYS);
> > - pp_off = I915_READ(PCH_PP_OFF_DELAYS);
> > - pp_div = I915_READ(PCH_PP_DIVISOR);
> > + if (IS_VALLEYVIEW(dev)) {
> > + pp_on = I915_READ(PIPEA_PP_ON_DELAYS);
> > + pp_off = I915_READ(PIPEA_PP_OFF_DELAYS);
> > + pp_div = I915_READ(PIPEA_PP_DIVISOR);
> > + } else {
> > + pp_on = I915_READ(PCH_PP_ON_DELAYS);
> > + pp_off = I915_READ(PCH_PP_OFF_DELAYS);
> > + pp_div = I915_READ(PCH_PP_DIVISOR);
> > + }
> >
> > if (!pp_on || !pp_off || !pp_div) {
> > DRM_INFO("bad panel power sequencing delays, disabling panel\n");
>
> I think Daniel's right that it would be good to abstract this a bit.
> Pretty sure people are building machines with multiple embedded panels
> and using some i2c interface for doing the secondary sequence. A good
> abstraction would help with that too.
I'll happily reiterate that I prefer abstraction once we actually have
more than one user, so I don't mind merging this here ...
-Daniel
--
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
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