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Message-Id: <20240726-amdgpu-edid-bios-v2-2-8a0326654253@weissschuh.net>
Date: Fri, 26 Jul 2024 15:40:16 +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>,
Xinhui Pan <Xinhui.Pan@....com>
Cc: amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
linux-kernel@...r.kernel.org,
Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH v2 2/2] drm/radeon: 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>
---
drivers/gpu/drm/radeon/radeon_atombios.c | 17 ++++++-----------
drivers/gpu/drm/radeon/radeon_combios.c | 26 +++++---------------------
drivers/gpu/drm/radeon/radeon_connectors.c | 4 ++--
drivers/gpu/drm/radeon/radeon_display.c | 2 +-
drivers/gpu/drm/radeon/radeon_mode.h | 4 ++--
5 files changed, 16 insertions(+), 37 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c
index 168f3f94003b..81a0a91921b9 100644
--- a/drivers/gpu/drm/radeon/radeon_atombios.c
+++ b/drivers/gpu/drm/radeon/radeon_atombios.c
@@ -1716,23 +1716,18 @@ struct radeon_encoder_atom_dig *radeon_atombios_get_lvds_info(struct
case LCD_FAKE_EDID_PATCH_RECORD_TYPE:
fake_edid_record = (ATOM_FAKE_EDID_PATCH_RECORD *)record;
if (fake_edid_record->ucFakeEDIDLength) {
- struct edid *edid;
+ const struct drm_edid *edid;
int edid_size;
if (fake_edid_record->ucFakeEDIDLength == 128)
edid_size = fake_edid_record->ucFakeEDIDLength;
else
edid_size = fake_edid_record->ucFakeEDIDLength * 128;
- edid = kmemdup(&fake_edid_record->ucFakeEDIDString[0],
- edid_size, GFP_KERNEL);
- if (edid) {
- if (drm_edid_is_valid(edid)) {
- rdev->mode_info.bios_hardcoded_edid = edid;
- rdev->mode_info.bios_hardcoded_edid_size = edid_size;
- } else {
- kfree(edid);
- }
- }
+ edid = drm_edid_alloc(fake_edid_record->ucFakeEDIDString, edid_size);
+ if (drm_edid_valid(edid))
+ rdev->mode_info.bios_hardcoded_edid = edid;
+ else
+ drm_edid_free(edid);
record += struct_size(fake_edid_record,
ucFakeEDIDString,
edid_size);
diff --git a/drivers/gpu/drm/radeon/radeon_combios.c b/drivers/gpu/drm/radeon/radeon_combios.c
index 41ddc576f8f8..df8d7f56b028 100644
--- a/drivers/gpu/drm/radeon/radeon_combios.c
+++ b/drivers/gpu/drm/radeon/radeon_combios.c
@@ -370,7 +370,7 @@ static uint16_t combios_get_table_offset(struct drm_device *dev,
bool radeon_combios_check_hardcoded_edid(struct radeon_device *rdev)
{
int edid_info, size;
- struct edid *edid;
+ const struct drm_edid *edid;
unsigned char *raw;
edid_info = combios_get_table_offset(rdev_to_drm(rdev), COMBIOS_HARDCODED_EDID_TABLE);
if (!edid_info)
@@ -378,19 +378,14 @@ bool radeon_combios_check_hardcoded_edid(struct radeon_device *rdev)
raw = rdev->bios + edid_info;
size = EDID_LENGTH * (raw[0x7e] + 1);
- edid = kmalloc(size, GFP_KERNEL);
- if (edid == NULL)
- return false;
-
- memcpy((unsigned char *)edid, raw, size);
+ edid = drm_edid_alloc(raw, size);
- if (!drm_edid_is_valid(edid)) {
- kfree(edid);
+ if (!drm_edid_valid(edid)) {
+ drm_edid_free(edid);
return false;
}
rdev->mode_info.bios_hardcoded_edid = edid;
- rdev->mode_info.bios_hardcoded_edid_size = size;
return true;
}
@@ -398,18 +393,7 @@ bool radeon_combios_check_hardcoded_edid(struct radeon_device *rdev)
struct edid *
radeon_bios_get_hardcoded_edid(struct radeon_device *rdev)
{
- struct edid *edid;
-
- if (rdev->mode_info.bios_hardcoded_edid) {
- edid = kmalloc(rdev->mode_info.bios_hardcoded_edid_size, GFP_KERNEL);
- if (edid) {
- memcpy((unsigned char *)edid,
- (unsigned char *)rdev->mode_info.bios_hardcoded_edid,
- rdev->mode_info.bios_hardcoded_edid_size);
- return edid;
- }
- }
- return NULL;
+ return drm_edid_duplicate(drm_edid_raw(rdev->mode_info.bios_hardcoded_edid));
}
static struct radeon_i2c_bus_rec combios_setup_i2c_bus(struct radeon_device *rdev,
diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c
index 880edabfc9e3..528a8f3677c2 100644
--- a/drivers/gpu/drm/radeon/radeon_connectors.c
+++ b/drivers/gpu/drm/radeon/radeon_connectors.c
@@ -1059,7 +1059,7 @@ radeon_vga_detect(struct drm_connector *connector, bool force)
*/
if ((!rdev->is_atom_bios) &&
(ret == connector_status_disconnected) &&
- rdev->mode_info.bios_hardcoded_edid_size) {
+ rdev->mode_info.bios_hardcoded_edid) {
ret = connector_status_connected;
}
@@ -1392,7 +1392,7 @@ radeon_dvi_detect(struct drm_connector *connector, bool force)
out:
if ((!rdev->is_atom_bios) &&
(ret == connector_status_disconnected) &&
- rdev->mode_info.bios_hardcoded_edid_size) {
+ rdev->mode_info.bios_hardcoded_edid) {
radeon_connector->use_digital = true;
ret = connector_status_connected;
}
diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index 10fd58f400bc..8f5f8abcb1b4 100644
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -1658,7 +1658,7 @@ void radeon_modeset_fini(struct radeon_device *rdev)
rdev->mode_info.mode_config_initialized = false;
}
- kfree(rdev->mode_info.bios_hardcoded_edid);
+ drm_edid_free(rdev->mode_info.bios_hardcoded_edid);
/* free i2c buses */
radeon_i2c_fini(rdev);
diff --git a/drivers/gpu/drm/radeon/radeon_mode.h b/drivers/gpu/drm/radeon/radeon_mode.h
index e0a5af180801..421c83fc70dc 100644
--- a/drivers/gpu/drm/radeon/radeon_mode.h
+++ b/drivers/gpu/drm/radeon/radeon_mode.h
@@ -39,6 +39,7 @@
#include <linux/i2c-algo-bit.h>
struct edid;
+struct drm_edid;
struct radeon_bo;
struct radeon_device;
@@ -262,8 +263,7 @@ struct radeon_mode_info {
/* Output CSC */
struct drm_property *output_csc_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 */
u16 firmware_flags;
--
2.45.2
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