linux-kernel - [PATCH v2 2/7] drm: atmel-hlcdc: avoid initializing cfg with zero

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Message-ID: <1551780434-4580-3-git-send-email-claudiu.beznea@microchip.com>
Date:   Tue, 5 Mar 2019 10:07:43 +0000
From:   <Claudiu.Beznea@...rochip.com>
To:     <lee.jones@...aro.org>, <robh+dt@...nel.org>,
        <mark.rutland@....com>, <Nicolas.Ferre@...rochip.com>,
        <alexandre.belloni@...tlin.com>, <Ludovic.Desroches@...rochip.com>,
        <bbrezillon@...nel.org>, <airlied@...ux.ie>, <daniel@...ll.ch>,
        <thierry.reding@...il.com>
CC:     <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
        <linux-pwm@...r.kernel.org>, <Claudiu.Beznea@...rochip.com>
Subject: [PATCH v2 2/7] drm: atmel-hlcdc: avoid initializing cfg with zero

From: Claudiu Beznea <claudiu.beznea@...rochip.com>

Remove cfg initialization with zero and read state with
drm_crtc_state_to_atmel_hlcdc_crtc_state() so that cfg to be initialized
with state's output_mode.

Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
Reviewed-by: Sam Ravnborg <sam@...nborg.org>
---
 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
index 957e6d2fb00f..81c50772df05 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
@@ -138,7 +138,8 @@ static void atmel_hlcdc_crtc_mode_set_nofb(struct drm_crtc *c)
 
 	regmap_update_bits(regmap, ATMEL_HLCDC_CFG(0), mask, cfg);
 
-	cfg = 0;
+	state = drm_crtc_state_to_atmel_hlcdc_crtc_state(c->state);
+	cfg = state->output_mode << 8;
 
 	if (adj->flags & DRM_MODE_FLAG_NVSYNC)
 		cfg |= ATMEL_HLCDC_VSPOL;
@@ -146,9 +147,6 @@ static void atmel_hlcdc_crtc_mode_set_nofb(struct drm_crtc *c)
 	if (adj->flags & DRM_MODE_FLAG_NHSYNC)
 		cfg |= ATMEL_HLCDC_HSPOL;
 
-	state = drm_crtc_state_to_atmel_hlcdc_crtc_state(c->state);
-	cfg |= state->output_mode << 8;
-
 	regmap_update_bits(regmap, ATMEL_HLCDC_CFG(5),
 			   ATMEL_HLCDC_HSPOL | ATMEL_HLCDC_VSPOL |
 			   ATMEL_HLCDC_VSPDLYS | ATMEL_HLCDC_VSPDLYE |
-- 
2.7.4