[Intel-gfx] [PATCH v2 1/8] drm/edid: make a number of functions, parameters and variables const
Jani Nikula
jani.nikula at intel.com
Mon Mar 29 13:37:15 UTC 2021
If there's no need to change it, it should be const. There's more to be
done, but start off with changes that make follow-up work easier. No
functional changes.
Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula at intel.com>
---
drivers/gpu/drm/drm_edid.c | 58 ++++++++++++++++++-------------------
include/drm/drm_displayid.h | 4 +--
2 files changed, 31 insertions(+), 31 deletions(-)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index c2bbe7bee7b6..d510b827a1f8 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -1585,7 +1585,7 @@ module_param_named(edid_fixup, edid_fixup, int, 0400);
MODULE_PARM_DESC(edid_fixup,
"Minimum number of valid EDID header bytes (0-8, default 6)");
-static int validate_displayid(u8 *displayid, int length, int idx);
+static int validate_displayid(const u8 *displayid, int length, int idx);
static int drm_edid_block_checksum(const u8 *raw_edid)
{
@@ -3241,10 +3241,10 @@ add_detailed_modes(struct drm_connector *connector, struct edid *edid,
/*
* Search EDID for CEA extension block.
*/
-static u8 *drm_find_edid_extension(const struct edid *edid,
- int ext_id, int *ext_index)
+static const u8 *drm_find_edid_extension(const struct edid *edid,
+ int ext_id, int *ext_index)
{
- u8 *edid_ext = NULL;
+ const u8 *edid_ext = NULL;
int i;
/* No EDID or EDID extensions */
@@ -3253,7 +3253,7 @@ static u8 *drm_find_edid_extension(const struct edid *edid,
/* Find CEA extension */
for (i = *ext_index; i < edid->extensions; i++) {
- edid_ext = (u8 *)edid + EDID_LENGTH * (i + 1);
+ edid_ext = (const u8 *)edid + EDID_LENGTH * (i + 1);
if (edid_ext[0] == ext_id)
break;
}
@@ -3267,12 +3267,12 @@ static u8 *drm_find_edid_extension(const struct edid *edid,
}
-static u8 *drm_find_displayid_extension(const struct edid *edid,
- int *length, int *idx,
- int *ext_index)
+static const u8 *drm_find_displayid_extension(const struct edid *edid,
+ int *length, int *idx,
+ int *ext_index)
{
- u8 *displayid = drm_find_edid_extension(edid, DISPLAYID_EXT, ext_index);
- struct displayid_hdr *base;
+ const u8 *displayid = drm_find_edid_extension(edid, DISPLAYID_EXT, ext_index);
+ const struct displayid_hdr *base;
int ret;
if (!displayid)
@@ -3286,18 +3286,18 @@ static u8 *drm_find_displayid_extension(const struct edid *edid,
if (ret)
return NULL;
- base = (struct displayid_hdr *)&displayid[*idx];
+ base = (const struct displayid_hdr *)&displayid[*idx];
*length = *idx + sizeof(*base) + base->bytes;
return displayid;
}
-static u8 *drm_find_cea_extension(const struct edid *edid)
+static const u8 *drm_find_cea_extension(const struct edid *edid)
{
int length, idx;
- struct displayid_block *block;
- u8 *cea;
- u8 *displayid;
+ const struct displayid_block *block;
+ const u8 *cea;
+ const u8 *displayid;
int ext_index;
/* Look for a top level CEA extension block */
@@ -3318,7 +3318,7 @@ static u8 *drm_find_cea_extension(const struct edid *edid)
idx += sizeof(struct displayid_hdr);
for_each_displayid_db(displayid, block, idx, length) {
if (block->tag == DATA_BLOCK_CTA)
- return (u8 *)block;
+ return (const u8 *)block;
}
}
@@ -4503,8 +4503,8 @@ static void clear_eld(struct drm_connector *connector)
static void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
{
uint8_t *eld = connector->eld;
- u8 *cea;
- u8 *db;
+ const u8 *cea;
+ const u8 *db;
int total_sad_count = 0;
int mnl;
int dbl;
@@ -4600,7 +4600,7 @@ int drm_edid_to_sad(struct edid *edid, struct cea_sad **sads)
{
int count = 0;
int i, start, end, dbl;
- u8 *cea;
+ const u8 *cea;
cea = drm_find_cea_extension(edid);
if (!cea) {
@@ -4619,7 +4619,7 @@ int drm_edid_to_sad(struct edid *edid, struct cea_sad **sads)
}
for_each_cea_db(cea, i, start, end) {
- u8 *db = &cea[i];
+ const u8 *db = &cea[i];
if (cea_db_tag(db) == AUDIO_BLOCK) {
int j;
@@ -4631,7 +4631,7 @@ int drm_edid_to_sad(struct edid *edid, struct cea_sad **sads)
if (!*sads)
return -ENOMEM;
for (j = 0; j < count; j++) {
- u8 *sad = &db[1 + j * 3];
+ const u8 *sad = &db[1 + j * 3];
(*sads)[j].format = (sad[0] & 0x78) >> 3;
(*sads)[j].channels = sad[0] & 0x7;
@@ -4755,7 +4755,7 @@ EXPORT_SYMBOL(drm_av_sync_delay);
*/
bool drm_detect_hdmi_monitor(struct edid *edid)
{
- u8 *edid_ext;
+ const u8 *edid_ext;
int i;
int start_offset, end_offset;
@@ -4793,7 +4793,7 @@ EXPORT_SYMBOL(drm_detect_hdmi_monitor);
*/
bool drm_detect_monitor_audio(struct edid *edid)
{
- u8 *edid_ext;
+ const u8 *edid_ext;
int i, j;
bool has_audio = false;
int start_offset, end_offset;
@@ -5287,13 +5287,13 @@ u32 drm_add_display_info(struct drm_connector *connector, const struct edid *edi
return quirks;
}
-static int validate_displayid(u8 *displayid, int length, int idx)
+static int validate_displayid(const u8 *displayid, int length, int idx)
{
int i, dispid_length;
u8 csum = 0;
- struct displayid_hdr *base;
+ const struct displayid_hdr *base;
- base = (struct displayid_hdr *)&displayid[idx];
+ base = (const struct displayid_hdr *)&displayid[idx];
DRM_DEBUG_KMS("base revision 0x%x, length %d, %d %d\n",
base->rev, base->bytes, base->prod_id, base->ext_count);
@@ -5359,7 +5359,7 @@ static struct drm_display_mode *drm_mode_displayid_detailed(struct drm_device *d
}
static int add_displayid_detailed_1_modes(struct drm_connector *connector,
- struct displayid_block *block)
+ const struct displayid_block *block)
{
struct displayid_detailed_timing_block *det = (struct displayid_detailed_timing_block *)block;
int i;
@@ -5387,9 +5387,9 @@ static int add_displayid_detailed_1_modes(struct drm_connector *connector,
static int add_displayid_detailed_modes(struct drm_connector *connector,
struct edid *edid)
{
- u8 *displayid;
+ const u8 *displayid;
int length, idx;
- struct displayid_block *block;
+ const struct displayid_block *block;
int num_modes = 0;
int ext_index = 0;
diff --git a/include/drm/drm_displayid.h b/include/drm/drm_displayid.h
index 77941efb5426..f141c0eff083 100644
--- a/include/drm/drm_displayid.h
+++ b/include/drm/drm_displayid.h
@@ -93,11 +93,11 @@ struct displayid_detailed_timing_block {
};
#define for_each_displayid_db(displayid, block, idx, length) \
- for ((block) = (struct displayid_block *)&(displayid)[idx]; \
+ for ((block) = (const struct displayid_block *)&(displayid)[idx]; \
(idx) + sizeof(struct displayid_block) <= (length) && \
(idx) + sizeof(struct displayid_block) + (block)->num_bytes <= (length) && \
(block)->num_bytes > 0; \
(idx) += sizeof(struct displayid_block) + (block)->num_bytes, \
- (block) = (struct displayid_block *)&(displayid)[idx])
+ (block) = (const struct displayid_block *)&(displayid)[idx])
#endif
--
2.20.1
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