[PATCH v2 2/2] drm/radeon: convert bios_hardcoded_edid to drm_edid

Alex Deucher alexdeucher at gmail.com
Fri Jul 26 14:24:44 UTC 2024


Applied the series.  Thanks!

Alex

On Fri, Jul 26, 2024 at 9:40 AM Thomas Weißschuh <linux at weissschuh.net> wrote:
>
> 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 at weissschuh.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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