linux-kernel - [PATCH 05/12] drm/amd/display: Constify raw_edid handling in dm_helpers_parse_edid

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Message-Id: <20240818-amdgpu-drm_edid-v1-5-aea66c1f7cf4@weissschuh.net>
Date: Sun, 18 Aug 2024 12:43:29 +0200
From: Thomas Weißschuh <linux@...ssschuh.net>
To: Harry Wentland <harry.wentland@....com>, Leo Li <sunpeng.li@....com>, 
 Rodrigo Siqueira <Rodrigo.Siqueira@....com>, 
 Alex Deucher <alexander.deucher@....com>, 
 Christian König <christian.koenig@....com>, 
 Xinhui Pan <Xinhui.Pan@....com>, David Airlie <airlied@...il.com>, 
 Daniel Vetter <daniel@...ll.ch>, jinzh <jinzh@...hub.amd.com>, 
 Aric Cyr <Aric.Cyr@....com>, Alan Liu <HaoPing.Liu@....com>, 
 Tony Cheng <Tony.Cheng@....com>, 
 Andrey Grodzovsky <Andrey.Grodzovsky@....com>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>
Cc: amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org, 
 linux-kernel@...r.kernel.org, Harry Wentland <Harry.Wentland@....com>, 
 Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH 05/12] drm/amd/display: Constify raw_edid handling in
 dm_helpers_parse_edid_caps()

The argument edid is passed in as const.
Preserve this constness through the edid_buf variable and the used
helper functions.

Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
index 3cc0808f391a..98d1d5abafa7 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
@@ -45,14 +45,14 @@
 #include "dm_helpers.h"
 #include "ddc_service_types.h"
 
-static u32 edid_extract_panel_id(struct edid *edid)
+static u32 edid_extract_panel_id(const struct edid *edid)
 {
 	return (u32)edid->mfg_id[0] << 24   |
 	       (u32)edid->mfg_id[1] << 16   |
 	       (u32)EDID_PRODUCT_ID(edid);
 }
 
-static void apply_edid_quirks(struct edid *edid, struct dc_edid_caps *edid_caps)
+static void apply_edid_quirks(const struct edid *edid, struct dc_edid_caps *edid_caps)
 {
 	uint32_t panel_id = edid_extract_panel_id(edid);
 
@@ -94,7 +94,7 @@ enum dc_edid_status dm_helpers_parse_edid_caps(
 {
 	struct amdgpu_dm_connector *aconnector = link->priv;
 	struct drm_connector *connector = &aconnector->base;
-	struct edid *edid_buf;
+	const struct edid *edid_buf;
 	struct cea_sad *sads;
 	int sad_count = -1;
 	int sadb_count = -1;
@@ -106,7 +106,7 @@ enum dc_edid_status dm_helpers_parse_edid_caps(
 	if (!edid_caps || !edid)
 		return EDID_BAD_INPUT;
 
-	edid_buf = (struct edid *)edid->raw_edid;
+	edid_buf = (const struct edid *)edid->raw_edid;
 
 	if (!drm_edid_is_valid(edid_buf))
 		result = EDID_BAD_CHECKSUM;

-- 
2.46.0