linux-kernel - [PATCH 5/5] drm/zte: Use common drm_fixed_16

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Date:   Wed,  1 Sep 2021 13:54:31 -0400
From:   Alyssa Rosenzweig <alyssa@...enzweig.io>
To:     dri-devel@...ts.freedesktop.org
Cc:     Neil Armstrong <narmstrong@...libre.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
        Sandy Huang <hjc@...k-chips.com>,
        Heiko Stübner <heiko@...ech.de>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Abhinav Kumar <abhinavk@...eaurora.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Lee Jones <lee.jones@...aro.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Kalyan Thota <kalyan_t@...eaurora.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Ville Syrjälä 
        <ville.syrjala@...ux.intel.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Alyssa Rosenzweig <alyssa@...enzweig.io>
Subject: [PATCH 5/5] drm/zte: Use common drm_fixed_16_16 helper

Replace our open-coded FRAC_16_16 with the common drm_fixed_16_16
helper to reduce code duplication between drivers.

Signed-off-by: Alyssa Rosenzweig <alyssa@...enzweig.io>
---
 drivers/gpu/drm/zte/zx_plane.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/zte/zx_plane.c b/drivers/gpu/drm/zte/zx_plane.c
index 93bcca428e35..80f61d79be83 100644
--- a/drivers/gpu/drm/zte/zx_plane.c
+++ b/drivers/gpu/drm/zte/zx_plane.c
@@ -11,6 +11,7 @@
 #include <drm/drm_gem_cma_helper.h>
 #include <drm/drm_modeset_helper_vtables.h>
 #include <drm/drm_plane_helper.h>
+#include <drm/drm_fixed.h>
 
 #include "zx_common_regs.h"
 #include "zx_drm_drv.h"
@@ -43,8 +44,6 @@ static const uint32_t vl_formats[] = {
 	 */
 };
 
-#define FRAC_16_16(mult, div)    (((mult) << 16) / (div))
-
 static int zx_vl_plane_atomic_check(struct drm_plane *plane,
 				    struct drm_atomic_state *state)
 {
@@ -53,8 +52,8 @@ static int zx_vl_plane_atomic_check(struct drm_plane *plane,
 	struct drm_framebuffer *fb = plane_state->fb;
 	struct drm_crtc *crtc = plane_state->crtc;
 	struct drm_crtc_state *crtc_state;
-	int min_scale = FRAC_16_16(1, 8);
-	int max_scale = FRAC_16_16(8, 1);
+	int min_scale = drm_fixed_16_16(1, 8);
+	int max_scale = drm_fixed_16_16(8, 1);
 
 	if (!crtc || WARN_ON(!fb))
 		return 0;
-- 
2.30.2