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Message-Id: <20240616-amdgpu-edid-bios-v1-1-2874f212b365@weissschuh.net>
Date: Sun, 16 Jun 2024 11:12:03 +0200
From: Thomas Weißschuh <linux@...ssschuh.net>
To: Alex Deucher <alexander.deucher@....com>,
Christian König <christian.koenig@....com>,
David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>
Cc: amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
linux-kernel@...r.kernel.org,
Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH] drm/amdgpu: convert bios_hardcoded_edid to drm_edid
Instead of manually passing around 'struct edid *' and its size,
use 'struct drm_edid', which encapsulates a validated combination of
both.
As the drm_edid_ can handle NULL gracefully, the explicit checks can be
dropped.
Also save a few characters by transforming '&array[0]' to the equivalent
'array' and using 'max_t(int, ...)' instead of manual casts.
Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
---
While this patch introduces a new user for drm_edid_raw(),
if amdgpu proper gets migrated to 'struct drm_edid', that usage will go
away.
This is only compile-tested.
I have some more patches for the rest of amdgpu,
to move to 'struct drm_edid'.
This patch is a test-balloon for the general idea.
The same can also be done for drm/radeon.
---
drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c | 6 +-----
drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h | 4 ++--
drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c | 2 +-
drivers/gpu/drm/amd/amdgpu/atombios_encoders.c | 21 +++++++--------------
drivers/gpu/drm/amd/amdgpu/dce_v10_0.c | 2 +-
drivers/gpu/drm/amd/amdgpu/dce_v11_0.c | 2 +-
drivers/gpu/drm/amd/amdgpu/dce_v6_0.c | 2 +-
drivers/gpu/drm/amd/amdgpu/dce_v8_0.c | 2 +-
8 files changed, 15 insertions(+), 26 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c
index 9caba10315a8..f1b11b27cce0 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c
@@ -265,11 +265,7 @@ struct edid *amdgpu_connector_edid(struct drm_connector *connector)
static struct edid *
amdgpu_connector_get_hardcoded_edid(struct amdgpu_device *adev)
{
- if (adev->mode_info.bios_hardcoded_edid) {
- return kmemdup((unsigned char *)adev->mode_info.bios_hardcoded_edid,
- adev->mode_info.bios_hardcoded_edid_size, GFP_KERNEL);
- }
- return NULL;
+ return drm_edid_duplicate(drm_edid_raw(adev->mode_info.bios_hardcoded_edid));
}
static void amdgpu_connector_get_edid(struct drm_connector *connector)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
index 1fe21a70ddd0..928ac3f1e2ba 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
@@ -51,6 +51,7 @@ struct amdgpu_encoder;
struct amdgpu_router;
struct amdgpu_hpd;
struct edid;
+struct drm_edid;
#define to_amdgpu_crtc(x) container_of(x, struct amdgpu_crtc, base)
#define to_amdgpu_connector(x) container_of(x, struct amdgpu_connector, base)
@@ -325,8 +326,7 @@ struct amdgpu_mode_info {
/* FMT dithering */
struct drm_property *dither_property;
/* hardcoded DFP edid from BIOS */
- struct edid *bios_hardcoded_edid;
- int bios_hardcoded_edid_size;
+ const struct drm_edid *bios_hardcoded_edid;
/* firmware flags */
u32 firmware_flags;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c
index e30eecd02ae1..543275db8302 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c
@@ -539,7 +539,7 @@ static int amdgpu_vkms_sw_fini(void *handle)
adev->mode_info.mode_config_initialized = false;
- kfree(adev->mode_info.bios_hardcoded_edid);
+ drm_edid_free(adev->mode_info.bios_hardcoded_edid);
kfree(adev->amdgpu_vkms_output);
return 0;
}
diff --git a/drivers/gpu/drm/amd/amdgpu/atombios_encoders.c b/drivers/gpu/drm/amd/amdgpu/atombios_encoders.c
index 25feab188dfe..90383094ed1e 100644
--- a/drivers/gpu/drm/amd/amdgpu/atombios_encoders.c
+++ b/drivers/gpu/drm/amd/amdgpu/atombios_encoders.c
@@ -2064,20 +2064,13 @@ amdgpu_atombios_encoder_get_lcd_info(struct amdgpu_encoder *encoder)
case LCD_FAKE_EDID_PATCH_RECORD_TYPE:
fake_edid_record = (ATOM_FAKE_EDID_PATCH_RECORD *)record;
if (fake_edid_record->ucFakeEDIDLength) {
- struct edid *edid;
- int edid_size =
- max((int)EDID_LENGTH, (int)fake_edid_record->ucFakeEDIDLength);
- edid = kmalloc(edid_size, GFP_KERNEL);
- if (edid) {
- memcpy((u8 *)edid, (u8 *)&fake_edid_record->ucFakeEDIDString[0],
- fake_edid_record->ucFakeEDIDLength);
-
- if (drm_edid_is_valid(edid)) {
- adev->mode_info.bios_hardcoded_edid = edid;
- adev->mode_info.bios_hardcoded_edid_size = edid_size;
- } else
- kfree(edid);
- }
+ const struct drm_edid *edid;
+ edid = drm_edid_alloc(fake_edid_record->ucFakeEDIDString,
+ max_t(int, EDID_LENGTH, fake_edid_record->ucFakeEDIDLength));
+ if (drm_edid_valid(edid))
+ adev->mode_info.bios_hardcoded_edid = edid;
+ else
+ drm_edid_free(edid);
}
record += fake_edid_record->ucFakeEDIDLength ?
struct_size(fake_edid_record,
diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c
index b44fce44c066..11d648e688ce 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c
@@ -2846,7 +2846,7 @@ static int dce_v10_0_sw_fini(void *handle)
{
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
- kfree(adev->mode_info.bios_hardcoded_edid);
+ drm_edid_free(adev->mode_info.bios_hardcoded_edid);
drm_kms_helper_poll_fini(adev_to_drm(adev));
diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c
index 80b2e7f79acf..01536f523032 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c
@@ -2973,7 +2973,7 @@ static int dce_v11_0_sw_fini(void *handle)
{
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
- kfree(adev->mode_info.bios_hardcoded_edid);
+ drm_edid_free(adev->mode_info.bios_hardcoded_edid);
drm_kms_helper_poll_fini(adev_to_drm(adev));
diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
index db20012600f5..0e5b568a96fc 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
@@ -2745,7 +2745,7 @@ static int dce_v6_0_sw_fini(void *handle)
{
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
- kfree(adev->mode_info.bios_hardcoded_edid);
+ drm_edid_free(adev->mode_info.bios_hardcoded_edid);
drm_kms_helper_poll_fini(adev_to_drm(adev));
diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c
index 5b56100ec902..895f050a3e62 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c
@@ -2766,7 +2766,7 @@ static int dce_v8_0_sw_fini(void *handle)
{
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
- kfree(adev->mode_info.bios_hardcoded_edid);
+ drm_edid_free(adev->mode_info.bios_hardcoded_edid);
drm_kms_helper_poll_fini(adev_to_drm(adev));
---
base-commit: a3e18a540541325a8c8848171f71e0d45ad30b2c
change-id: 20240616-amdgpu-edid-bios-a31aa16b0321
Best regards,
--
Thomas Weißschuh <linux@...ssschuh.net>
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