Received-SPF: pass (google.com: domain of linux-kernel+bounces-45191-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.80.249 as permitted sender) client-ip=147.75.80.249;
Received-SPF: Pass (protection.outlook.com: domain of amd.com designates
 165.204.84.17 as permitted sender) receiver=protection.outlook.com;
 client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C
From: Mario Limonciello <mario.limonciello@amd.com>
To: <amd-gfx@lists.freedesktop.org>, Alex Deucher <alexander.deucher@amd.com>,
	Harry Wentland <harry.wentland@amd.com>, "Rafael J . Wysocki"
	<rafael@kernel.org>, Hans de Goede <hdegoede@redhat.com>
CC: "open list:ACPI" <linux-acpi@vger.kernel.org>, open list
	<linux-kernel@vger.kernel.org>, "open list:DRM DRIVERS"
	<dri-devel@lists.freedesktop.org>, Melissa Wen <mwen@igalia.com>, "Mark
 Pearson" <mpearson-lenovo@squebb.ca>, Mario Limonciello
	<mario.limonciello@amd.com>
Subject: [PATCH v2 4/4] drm/nouveau: Use drm_get_acpi_edid() helper
Date: Tue, 30 Jan 2024 13:26:08 -0600
Message-ID: <20240130192608.11666-5-mario.limonciello@amd.com>
In-Reply-To: <20240130192608.11666-1-mario.limonciello@amd.com>
References: <20240130192608.11666-1-mario.limonciello@amd.com>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Content-Type: text/plain
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Jan 2024 19:26:41.1672
 (UTC)
X-MS-Exchange-CrossTenant-Network-Message-Id: 8cb3eb7d-1312-4a82-b5d1-08dc21c96311
X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d
X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com]
X-MS-Exchange-CrossTenant-AuthSource:
	MWH0EPF000971E7.namprd02.prod.outlook.com
X-MS-Exchange-CrossTenant-AuthAs: Anonymous
X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem
X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ2PR12MB7823

Rather than inventing a wrapper to acpi_video_get_edid() use the
one provided by drm. This fixes two problems:
1. A memory leak that the memory provided by the ACPI call was
   never freed.
2. Validation of the BIOS provided blob.

Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
---
v1->v2:
 * New patch
---
 drivers/gpu/drm/nouveau/nouveau_acpi.c      | 27 ---------------------
 drivers/gpu/drm/nouveau/nouveau_acpi.h      |  2 --
 drivers/gpu/drm/nouveau/nouveau_connector.c |  2 +-
 3 files changed, 1 insertion(+), 30 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c b/drivers/gpu/drm/nouveau/nouveau_acpi.c
index 8f0c69aad248..de9daafb3fbb 100644
--- a/drivers/gpu/drm/nouveau/nouveau_acpi.c
+++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c
@@ -360,33 +360,6 @@ void nouveau_unregister_dsm_handler(void) {}
 void nouveau_switcheroo_optimus_dsm(void) {}
 #endif
 
-void *
-nouveau_acpi_edid(struct drm_device *dev, struct drm_connector *connector)
-{
-	struct acpi_device *acpidev;
-	int type, ret;
-	void *edid;
-
-	switch (connector->connector_type) {
-	case DRM_MODE_CONNECTOR_LVDS:
-	case DRM_MODE_CONNECTOR_eDP:
-		type = ACPI_VIDEO_DISPLAY_LCD;
-		break;
-	default:
-		return NULL;
-	}
-
-	acpidev = ACPI_COMPANION(dev->dev);
-	if (!acpidev)
-		return NULL;
-
-	ret = acpi_video_get_edid(acpidev, type, -1, &edid);
-	if (ret < 0)
-		return NULL;
-
-	return kmemdup(edid, EDID_LENGTH, GFP_KERNEL);
-}
-
 bool nouveau_acpi_video_backlight_use_native(void)
 {
 	return acpi_video_backlight_use_native();
diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.h b/drivers/gpu/drm/nouveau/nouveau_acpi.h
index e39dd8b94b8b..6a3def8e6cca 100644
--- a/drivers/gpu/drm/nouveau/nouveau_acpi.h
+++ b/drivers/gpu/drm/nouveau/nouveau_acpi.h
@@ -10,7 +10,6 @@ bool nouveau_is_v1_dsm(void);
 void nouveau_register_dsm_handler(void);
 void nouveau_unregister_dsm_handler(void);
 void nouveau_switcheroo_optimus_dsm(void);
-void *nouveau_acpi_edid(struct drm_device *, struct drm_connector *);
 bool nouveau_acpi_video_backlight_use_native(void);
 void nouveau_acpi_video_register_backlight(void);
 #else
@@ -19,7 +18,6 @@ static inline bool nouveau_is_v1_dsm(void) { return false; };
 static inline void nouveau_register_dsm_handler(void) {}
 static inline void nouveau_unregister_dsm_handler(void) {}
 static inline void nouveau_switcheroo_optimus_dsm(void) {}
-static inline void *nouveau_acpi_edid(struct drm_device *dev, struct drm_connector *connector) { return NULL; }
 static inline bool nouveau_acpi_video_backlight_use_native(void) { return true; }
 static inline void nouveau_acpi_video_register_backlight(void) {}
 #endif
diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
index 856b3ef5edb8..746571d4cac0 100644
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -713,7 +713,7 @@ nouveau_connector_detect_lvds(struct drm_connector *connector, bool force)
 	 * valid - it's not (rh#613284)
 	 */
 	if (nv_encoder->dcb->lvdsconf.use_acpi_for_edid) {
-		edid = nouveau_acpi_edid(dev, connector);
+		edid = drm_get_acpi_edid(connector);
 		if (edid) {
 			status = connector_status_connected;
 			goto out;
-- 
2.34.1