linux-kernel - [PATCH 4/6] drm/msm/dp: Use function arguments for aux writes

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20240326-msm-dp-cleanup-v1-4-e775556ecec0@quicinc.com>
Date: Tue, 26 Mar 2024 08:11:32 -0700
From: Bjorn Andersson <andersson@...nel.org>
To: Rob Clark <robdclark@...il.com>, 
 Abhinav Kumar <quic_abhinavk@...cinc.com>, 
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, Sean Paul <sean@...rly.run>, 
 Marijn Suijten <marijn.suijten@...ainline.org>, 
 David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>
Cc: linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org, 
 freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 Bjorn Andersson <quic_bjorande@...cinc.com>
Subject: [PATCH 4/6] drm/msm/dp: Use function arguments for aux writes

From: Bjorn Andersson <quic_bjorande@...cinc.com>

The dp_aux write operations takes the data to be operated on through a
member of struct dp_catalog, rather than as an argument to the function.

No state is maintained other than across the calling of the functions,
so replace this member with a function argument.

Signed-off-by: Bjorn Andersson <quic_bjorande@...cinc.com>
---
 drivers/gpu/drm/msm/dp/dp_aux.c     | 9 +++------
 drivers/gpu/drm/msm/dp/dp_catalog.c | 8 ++++----
 drivers/gpu/drm/msm/dp/dp_catalog.h | 5 ++---
 3 files changed, 9 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_aux.c b/drivers/gpu/drm/msm/dp/dp_aux.c
index adbd5a367395..2c8bcc60692a 100644
--- a/drivers/gpu/drm/msm/dp/dp_aux.c
+++ b/drivers/gpu/drm/msm/dp/dp_aux.c
@@ -87,8 +87,7 @@ static ssize_t dp_aux_write(struct dp_aux_private *aux,
 		/* index = 0, write */
 		if (i == 0)
 			reg |= DP_AUX_DATA_INDEX_WRITE;
-		aux->catalog->aux_data = reg;
-		dp_catalog_aux_write_data(aux->catalog);
+		dp_catalog_aux_write_data(aux->catalog, reg);
 	}
 
 	dp_catalog_aux_clear_trans(aux->catalog, false);
@@ -106,8 +105,7 @@ static ssize_t dp_aux_write(struct dp_aux_private *aux,
 	}
 
 	reg |= DP_AUX_TRANS_CTRL_GO;
-	aux->catalog->aux_data = reg;
-	dp_catalog_aux_write_trans(aux->catalog);
+	dp_catalog_aux_write_trans(aux->catalog, reg);
 
 	return len;
 }
@@ -145,8 +143,7 @@ static ssize_t dp_aux_cmd_fifo_rx(struct dp_aux_private *aux,
 	data = DP_AUX_DATA_INDEX_WRITE; /* INDEX_WRITE */
 	data |= DP_AUX_DATA_READ;  /* read */
 
-	aux->catalog->aux_data = data;
-	dp_catalog_aux_write_data(aux->catalog);
+	dp_catalog_aux_write_data(aux->catalog, data);
 
 	dp = msg->buffer;
 
diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c
index 55114a6aba7e..295bd4cb72cc 100644
--- a/drivers/gpu/drm/msm/dp/dp_catalog.c
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.c
@@ -169,21 +169,21 @@ u32 dp_catalog_aux_read_data(struct dp_catalog *dp_catalog)
 	return dp_read_aux(catalog, REG_DP_AUX_DATA);
 }
 
-int dp_catalog_aux_write_data(struct dp_catalog *dp_catalog)
+int dp_catalog_aux_write_data(struct dp_catalog *dp_catalog, u32 data)
 {
 	struct dp_catalog_private *catalog = container_of(dp_catalog,
 				struct dp_catalog_private, dp_catalog);
 
-	dp_write_aux(catalog, REG_DP_AUX_DATA, dp_catalog->aux_data);
+	dp_write_aux(catalog, REG_DP_AUX_DATA, data);
 	return 0;
 }
 
-int dp_catalog_aux_write_trans(struct dp_catalog *dp_catalog)
+int dp_catalog_aux_write_trans(struct dp_catalog *dp_catalog, u32 data)
 {
 	struct dp_catalog_private *catalog = container_of(dp_catalog,
 				struct dp_catalog_private, dp_catalog);
 
-	dp_write_aux(catalog, REG_DP_AUX_TRANS_CTRL, dp_catalog->aux_data);
+	dp_write_aux(catalog, REG_DP_AUX_TRANS_CTRL, data);
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h b/drivers/gpu/drm/msm/dp/dp_catalog.h
index 2c2dbeee7634..290ef8180c12 100644
--- a/drivers/gpu/drm/msm/dp/dp_catalog.h
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.h
@@ -48,7 +48,6 @@ enum dp_catalog_audio_header_type {
 };
 
 struct dp_catalog {
-	u32 aux_data;
 	u32 total;
 	u32 sync_start;
 	u32 width_blanking;
@@ -64,8 +63,8 @@ void dp_catalog_snapshot(struct dp_catalog *dp_catalog, struct msm_disp_state *d
 
 /* AUX APIs */
 u32 dp_catalog_aux_read_data(struct dp_catalog *dp_catalog);
-int dp_catalog_aux_write_data(struct dp_catalog *dp_catalog);
-int dp_catalog_aux_write_trans(struct dp_catalog *dp_catalog);
+int dp_catalog_aux_write_data(struct dp_catalog *dp_catalog, u32 data);
+int dp_catalog_aux_write_trans(struct dp_catalog *dp_catalog, u32 data);
 int dp_catalog_aux_clear_trans(struct dp_catalog *dp_catalog, bool read);
 int dp_catalog_aux_clear_hw_interrupts(struct dp_catalog *dp_catalog);
 void dp_catalog_aux_reset(struct dp_catalog *dp_catalog);

-- 
2.43.0