Re: [PATCH 02/12] drm/edid: Fix add_cea_modes() style issues

Ville Syrjälä
2013-08-14T10:16:25Z

On Wed, Aug 14, 2013 at 12:17:18AM +0100, Damien Lespiau wrote:
> A few styles issues have crept in here, fix them before touching this
> code again.
>
> v2: constify arguments that can be (Ville Syrjälä)
>
> Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
> ---
> drivers/gpu/drm/drm_edid.c | 15 ++++++++-------
> 1 file changed, 8 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index e014785..9e9b6ed 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -2301,7 +2301,7 @@ add_detailed_modes(struct drm_connector *connector, struct edid *edid,
> /*
> * Search EDID for CEA extension block.
> */
> -static u8 *drm_find_cea_extension(struct edid *edid)
> +static u8 *drm_find_cea_extension(const struct edid *edid)

This guy still casts away the const internally. Not sure if something
will complain about that. So maybe just drop this bit for now.

A long time ago I posted a big contify everything in drm_edid.c patch,
and it did in a way that didn't ad new warnings even w/ -Wcast-qual.
Maybe I should resurrect it.

> {
> u8 *edid_ext = NULL;
> int i;
> @@ -2441,10 +2441,11 @@ add_alternate_cea_modes(struct drm_connector *connector, struct edid *edid)
> }
>
> static int
> -do_cea_modes (struct drm_connector *connector, u8 *db, u8 len)
> +do_cea_modes(struct drm_connector *connector, const u8 *db, u8 len)
> {
> struct drm_device *dev = connector->dev;
> - u8 * mode, cea_mode;
> + const u8 *mode;
> + u8 cea_mode;
> int modes = 0;
>
> for (mode = db; mode < db + len; mode++) {
> @@ -2499,10 +2500,10 @@ cea_db_offsets(const u8 *cea, int *start, int *end)
> for ((i) = (start); (i) < (end) && (i) + cea_db_payload_len(&(cea)[(i)]) < (end); (i) += cea_db_payload_len(&(cea)[(i)]) + 1)
>
> static int
> -add_cea_modes(struct drm_connector *connector, struct edid *edid)
> +add_cea_modes(struct drm_connector *connector, const struct edid *edid)
> {
> - u8 * cea = drm_find_cea_extension(edid);
> - u8 * db, dbl;
> + u8 *cea = drm_find_cea_extension(edid);
> + u8 *db, dbl;

cea and db could be const here.

> int modes = 0;
>
> if (cea && cea_revision(cea) >= 3) {
> @@ -2516,7 +2517,7 @@ add_cea_modes(struct drm_connector *connector, struct edid *edid)
> dbl = cea_db_payload_len(db);
>
> if (cea_db_tag(db) == VIDEO_BLOCK)
> - modes += do_cea_modes (connector, db+1, dbl);
> + modes += do_cea_modes(connector, db + 1, dbl);
> }
> }
>
> --
> 1.8.3.1
>
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--
Ville Syrjälä
Intel OTC