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From: Lyude Paul <lyude@redhat.com>
To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
	nouveau@lists.freedesktop.org
Cc: Rajeev Nandan <rajeevny@codeaurora.org>,
	greg.depoire@gmail.com, open list <linux-kernel@vger.kernel.org>,
	David Airlie <airlied@linux.ie>,
	Sean Paul <seanpaul@chromium.org>,
	Rodrigo Vivi <rodrigo.vivi@intel.com>
Subject: [PATCH v6 3/9] drm/i915/dpcd_bl: Cleanup intel_dp_aux_vesa_enable_backlight() a bit
Date: Fri, 14 May 2021 14:14:57 -0400	[thread overview]
Message-ID: <20210514181504.565252-4-lyude@redhat.com> (raw)
In-Reply-To: <20210514181504.565252-1-lyude@redhat.com>

Get rid of the extraneous switch case in here, and just open code
edp_backlight_mode as we only ever use it once.

v4:
* Check that backlight mode is DP_EDP_BACKLIGHT_CONTROL_MODE_DPCD, not
  DP_EDP_BACKLIGHT_CONTROL_MODE_MASK - imirkin

Signed-off-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
---
 .../gpu/drm/i915/display/intel_dp_aux_backlight.c | 15 ++-------------
 1 file changed, 2 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
index 1dbe38282ebe..1ab82933afb5 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
@@ -382,7 +382,7 @@ intel_dp_aux_vesa_enable_backlight(const struct intel_crtc_state *crtc_state,
 	struct intel_dp *intel_dp = intel_attached_dp(connector);
 	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
 	struct intel_panel *panel = &connector->panel;
-	u8 dpcd_buf, new_dpcd_buf, edp_backlight_mode;
+	u8 dpcd_buf, new_dpcd_buf;
 	u8 pwmgen_bit_count = panel->backlight.edp.vesa.pwmgen_bit_count;
 
 	if (drm_dp_dpcd_readb(&intel_dp->aux,
@@ -393,12 +393,8 @@ intel_dp_aux_vesa_enable_backlight(const struct intel_crtc_state *crtc_state,
 	}
 
 	new_dpcd_buf = dpcd_buf;
-	edp_backlight_mode = dpcd_buf & DP_EDP_BACKLIGHT_CONTROL_MODE_MASK;
 
-	switch (edp_backlight_mode) {
-	case DP_EDP_BACKLIGHT_CONTROL_MODE_PWM:
-	case DP_EDP_BACKLIGHT_CONTROL_MODE_PRESET:
-	case DP_EDP_BACKLIGHT_CONTROL_MODE_PRODUCT:
+	if ((dpcd_buf & DP_EDP_BACKLIGHT_CONTROL_MODE_MASK) != DP_EDP_BACKLIGHT_CONTROL_MODE_DPCD) {
 		new_dpcd_buf &= ~DP_EDP_BACKLIGHT_CONTROL_MODE_MASK;
 		new_dpcd_buf |= DP_EDP_BACKLIGHT_CONTROL_MODE_DPCD;
 
@@ -406,13 +402,6 @@ intel_dp_aux_vesa_enable_backlight(const struct intel_crtc_state *crtc_state,
 				       pwmgen_bit_count) != 1)
 			drm_dbg_kms(&i915->drm,
 				    "Failed to write aux pwmgen bit count\n");
-
-		break;
-
-	/* Do nothing when it is already DPCD mode */
-	case DP_EDP_BACKLIGHT_CONTROL_MODE_DPCD:
-	default:
-		break;
 	}
 
 	if (panel->backlight.edp.vesa.pwm_freq_pre_divider) {
-- 
2.31.1


  parent reply	other threads:[~2021-05-14 18:15 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-14 18:14 [PATCH v6 0/9] drm: Extract DPCD backlight helpers from i915, add support in nouveau Lyude Paul
2021-05-14 18:14 ` [PATCH v6 1/9] drm/i915/dpcd_bl: Remove redundant AUX backlight frequency calculations Lyude Paul
2021-05-21 20:03   ` Rodrigo Vivi
2021-06-01 19:13     ` Jani Nikula
2021-05-14 18:14 ` [PATCH v6 2/9] drm/i915/dpcd_bl: Handle drm_dpcd_read/write() return values correctly Lyude Paul
2021-05-14 18:14 ` Lyude Paul [this message]
2021-05-14 18:14 ` [PATCH v6 4/9] drm/i915/dpcd_bl: Cache some backlight capabilities in intel_panel.backlight Lyude Paul
2021-05-14 18:14 ` [PATCH v6 5/9] drm/i915/dpcd_bl: Move VESA backlight enabling code closer together Lyude Paul
2021-05-14 18:15 ` [PATCH v6 6/9] drm/i915/dpcd_bl: Return early in vesa_calc_max_backlight if we can't read PWMGEN_BIT_COUNT Lyude Paul
2021-05-14 18:15 ` [PATCH v6 7/9] drm/i915/dpcd_bl: Print return codes for VESA backlight failures Lyude Paul
2021-05-14 18:15 ` [PATCH v6 8/9] drm/dp: Extract i915's eDP backlight code into DRM helpers Lyude Paul
2021-05-21 20:02   ` Rodrigo Vivi
2021-05-14 18:15 ` [PATCH v6 9/9] drm/nouveau/kms/nv50-: Add basic DPCD backlight support for nouveau Lyude Paul

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