[Intel-gfx] [PATCH v2 8/9] drm/i915: panel power sequencing for VLV eDP
Jesse Barnes
jbarnes at virtuousgeek.org
Thu Sep 27 17:26:15 CEST 2012
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.
Jesse
--
Jesse Barnes, Intel Open Source Technology Center
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