linux-kernel - [PATCH 2/5] drm/meson: Use common drm_fixed_16

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Date:   Wed,  1 Sep 2021 13:54:28 -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>,
        linux-amlogic@...ts.infradead.org
Subject: [PATCH 2/5] drm/meson: 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>
Cc: linux-amlogic@...ts.infradead.org
---
 drivers/gpu/drm/meson/meson_overlay.c | 7 +++----
 drivers/gpu/drm/meson/meson_plane.c   | 5 ++---
 2 files changed, 5 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/meson/meson_overlay.c b/drivers/gpu/drm/meson/meson_overlay.c
index dfef8afcc245..d8fc6bbb332f 100644
--- a/drivers/gpu/drm/meson/meson_overlay.c
+++ b/drivers/gpu/drm/meson/meson_overlay.c
@@ -15,6 +15,7 @@
 #include <drm/drm_gem_atomic_helper.h>
 #include <drm/drm_gem_cma_helper.h>
 #include <drm/drm_plane_helper.h>
+#include <drm/drm_fixed.h>
 
 #include "meson_overlay.h"
 #include "meson_registers.h"
@@ -162,8 +163,6 @@ struct meson_overlay {
 };
 #define to_meson_overlay(x) container_of(x, struct meson_overlay, base)
 
-#define FRAC_16_16(mult, div)    (((mult) << 16) / (div))
-
 static int meson_overlay_atomic_check(struct drm_plane *plane,
 				      struct drm_atomic_state *state)
 {
@@ -181,8 +180,8 @@ static int meson_overlay_atomic_check(struct drm_plane *plane,
 
 	return drm_atomic_helper_check_plane_state(new_plane_state,
 						   crtc_state,
-						   FRAC_16_16(1, 5),
-						   FRAC_16_16(5, 1),
+						   drm_fixed_16_16(1, 5),
+						   drm_fixed_16_16(5, 1),
 						   true, true);
 }
 
diff --git a/drivers/gpu/drm/meson/meson_plane.c b/drivers/gpu/drm/meson/meson_plane.c
index 8640a8a8a469..4fae9ebbf178 100644
--- a/drivers/gpu/drm/meson/meson_plane.c
+++ b/drivers/gpu/drm/meson/meson_plane.c
@@ -19,6 +19,7 @@
 #include <drm/drm_gem_atomic_helper.h>
 #include <drm/drm_gem_cma_helper.h>
 #include <drm/drm_plane_helper.h>
+#include <drm/drm_fixed.h>
 
 #include "meson_plane.h"
 #include "meson_registers.h"
@@ -68,8 +69,6 @@ struct meson_plane {
 };
 #define to_meson_plane(x) container_of(x, struct meson_plane, base)
 
-#define FRAC_16_16(mult, div)    (((mult) << 16) / (div))
-
 static int meson_plane_atomic_check(struct drm_plane *plane,
 				    struct drm_atomic_state *state)
 {
@@ -92,7 +91,7 @@ static int meson_plane_atomic_check(struct drm_plane *plane,
 	 */
 	return drm_atomic_helper_check_plane_state(new_plane_state,
 						   crtc_state,
-						   FRAC_16_16(1, 5),
+						   drm_fixed_16_16(1, 5),
 						   DRM_PLANE_HELPER_NO_SCALING,
 						   false, true);
 }
-- 
2.30.2