diff mbox

[16/19] drm/i915: don't touch the VDD when disabling the panel

Message ID 1385048853-1579-17-git-send-email-przanoni@gmail.com (mailing list archive)
State New, archived
Headers show

Commit Message

Paulo Zanoni Nov. 21, 2013, 3:47 p.m. UTC
From: Paulo Zanoni <paulo.r.zanoni@intel.com>

I don't see a reason to touch VDD when we're disabling the panel:
since the panel is enabled, we don't need VDD. This saves a few sleep
calls from the vdd_on and vdd_off functions at every modeset.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
---
 drivers/gpu/drm/i915/intel_ddi.c |  1 -
 drivers/gpu/drm/i915/intel_dp.c  | 10 +---------
 2 files changed, 1 insertion(+), 10 deletions(-)

Comments

Rodrigo Vivi Nov. 29, 2013, 2:41 p.m. UTC | #1
with or without my bikeshed on patch 10 and with same regress concern
than patch 15,
feel free to use  Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>


On Thu, Nov 21, 2013 at 1:47 PM, Paulo Zanoni <przanoni@gmail.com> wrote:
> From: Paulo Zanoni <paulo.r.zanoni@intel.com>
>
> I don't see a reason to touch VDD when we're disabling the panel:
> since the panel is enabled, we don't need VDD. This saves a few sleep
> calls from the vdd_on and vdd_off functions at every modeset.
>
> Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
> ---
>  drivers/gpu/drm/i915/intel_ddi.c |  1 -
>  drivers/gpu/drm/i915/intel_dp.c  | 10 +---------
>  2 files changed, 1 insertion(+), 10 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
> index e868f5f..5fc4b9e 100644
> --- a/drivers/gpu/drm/i915/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/intel_ddi.c
> @@ -1165,7 +1165,6 @@ static void intel_ddi_post_disable(struct intel_encoder *intel_encoder)
>
>         if (type == INTEL_OUTPUT_DISPLAYPORT || type == INTEL_OUTPUT_EDP) {
>                 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
> -               ironlake_edp_panel_vdd_on(intel_dp);
>                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
>                 ironlake_edp_panel_off(intel_dp);
>         }
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index 9e9e3d6..c2a89b2 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -1237,24 +1237,17 @@ void ironlake_edp_panel_off(struct intel_dp *intel_dp)
>
>         DRM_DEBUG_KMS("Turn eDP power off\n");
>
> -       WARN(!intel_dp->want_panel_vdd, "Need VDD to turn off panel\n");
> -
>         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);
> +       pp &= ~(POWER_TARGET_ON | PANEL_POWER_RESET | EDP_BLC_ENABLE);
>
>         pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
>
>         I915_WRITE(pp_ctrl_reg, pp);
>         POSTING_READ(pp_ctrl_reg);
>
> -       intel_dp->want_panel_vdd = false;
> -
>         ironlake_wait_panel_off(intel_dp);
> -
> -       /* We got a reference when we enabled the VDD. */
> -       intel_runtime_pm_put(dev_priv);
>  }
>
>  void ironlake_edp_backlight_on(struct intel_dp *intel_dp)
> @@ -1779,7 +1772,6 @@ static void intel_disable_dp(struct intel_encoder *encoder)
>
>         /* Make sure the panel is off before trying to change the mode. But also
>          * ensure that we have vdd while we switch off the panel. */
> -       ironlake_edp_panel_vdd_on(intel_dp);
>         ironlake_edp_backlight_off(intel_dp);
>         intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
>         ironlake_edp_panel_off(intel_dp);
> --
> 1.8.3.1
>
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
diff mbox

Patch

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index e868f5f..5fc4b9e 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -1165,7 +1165,6 @@  static void intel_ddi_post_disable(struct intel_encoder *intel_encoder)
 
 	if (type == INTEL_OUTPUT_DISPLAYPORT || type == INTEL_OUTPUT_EDP) {
 		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
-		ironlake_edp_panel_vdd_on(intel_dp);
 		intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
 		ironlake_edp_panel_off(intel_dp);
 	}
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 9e9e3d6..c2a89b2 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1237,24 +1237,17 @@  void ironlake_edp_panel_off(struct intel_dp *intel_dp)
 
 	DRM_DEBUG_KMS("Turn eDP power off\n");
 
-	WARN(!intel_dp->want_panel_vdd, "Need VDD to turn off panel\n");
-
 	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);
+	pp &= ~(POWER_TARGET_ON | PANEL_POWER_RESET | EDP_BLC_ENABLE);
 
 	pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
 
 	I915_WRITE(pp_ctrl_reg, pp);
 	POSTING_READ(pp_ctrl_reg);
 
-	intel_dp->want_panel_vdd = false;
-
 	ironlake_wait_panel_off(intel_dp);
-
-	/* We got a reference when we enabled the VDD. */
-	intel_runtime_pm_put(dev_priv);
 }
 
 void ironlake_edp_backlight_on(struct intel_dp *intel_dp)
@@ -1779,7 +1772,6 @@  static void intel_disable_dp(struct intel_encoder *encoder)
 
 	/* Make sure the panel is off before trying to change the mode. But also
 	 * ensure that we have vdd while we switch off the panel. */
-	ironlake_edp_panel_vdd_on(intel_dp);
 	ironlake_edp_backlight_off(intel_dp);
 	intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
 	ironlake_edp_panel_off(intel_dp);