From 68010305d6c7d8a61270892abd61eaed74a721db Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@intel.com>
Date: Mon, 28 Mar 2022 17:34:30 +0300
Subject: drm/edid: constify struct edid passed to detailed blocks
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Git-commit: eed628f116a7004f9ef751537d603f8b3d785298
Patch-mainline: v5.19-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
Constify the first level of struct edid in detailed timing parsing. Also
switch to struct edid instead of u8.
Cc: Ville Syrj채l채 <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrj채l채 <ville.syrjala@linux.intel.com>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/ec7acb8a9ee0e2868bbb2afdfdd7db114ae180e1.1648477901.git.jani.nikula@intel.com
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/drm_edid.c | 48 ++++++++++++++++++--------------------
1 file changed, 23 insertions(+), 25 deletions(-)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 47234cf211ca..dae394688e5b 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -2352,38 +2352,37 @@ static bool is_detailed_timing_descriptor(const struct detailed_timing *descript
typedef void detailed_cb(const struct detailed_timing *timing, void *closure);
static void
-cea_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure)
+cea_for_each_detailed_block(const u8 *ext, detailed_cb *cb, void *closure)
{
int i, n;
u8 d = ext[0x02];
- u8 *det_base = ext + d;
+ const u8 *det_base = ext + d;
if (d < 4 || d > 127)
return;
n = (127 - d) / 18;
for (i = 0; i < n; i++)
- cb((struct detailed_timing *)(det_base + 18 * i), closure);
+ cb((const struct detailed_timing *)(det_base + 18 * i), closure);
}
static void
-vtb_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure)
+vtb_for_each_detailed_block(const u8 *ext, detailed_cb *cb, void *closure)
{
unsigned int i, n = min((int)ext[0x02], 6);
- u8 *det_base = ext + 5;
+ const u8 *det_base = ext + 5;
if (ext[0x01] != 1)
return; /* unknown version */
for (i = 0; i < n; i++)
- cb((struct detailed_timing *)(det_base + 18 * i), closure);
+ cb((const struct detailed_timing *)(det_base + 18 * i), closure);
}
static void
-drm_for_each_detailed_block(u8 *raw_edid, detailed_cb *cb, void *closure)
+drm_for_each_detailed_block(const struct edid *edid, detailed_cb *cb, void *closure)
{
int i;
- struct edid *edid = (struct edid *)raw_edid;
if (edid == NULL)
return;
@@ -2391,8 +2390,8 @@ drm_for_each_detailed_block(u8 *raw_edid, detailed_cb *cb, void *closure)
for (i = 0; i < EDID_DETAILED_TIMINGS; i++)
cb(&(edid->detailed_timings[i]), closure);
- for (i = 1; i <= raw_edid[0x7e]; i++) {
- u8 *ext = raw_edid + (i * EDID_LENGTH);
+ for (i = 1; i <= edid->extensions; i++) {
+ const u8 *ext = (const u8 *)edid + (i * EDID_LENGTH);
switch (*ext) {
case CEA_EXT:
@@ -2430,7 +2429,7 @@ drm_monitor_supports_rb(struct edid *edid)
if (edid->revision >= 4) {
bool ret = false;
- drm_for_each_detailed_block((u8 *)edid, is_rb, &ret);
+ drm_for_each_detailed_block(edid, is_rb, &ret);
return ret;
}
@@ -2457,7 +2456,7 @@ drm_gtf2_hbreak(struct edid *edid)
{
const struct detailed_timing *descriptor = NULL;
- drm_for_each_detailed_block((u8 *)edid, find_gtf2, &descriptor);
+ drm_for_each_detailed_block(edid, find_gtf2, &descriptor);
BUILD_BUG_ON(offsetof(typeof(*descriptor), data.other_data.data.range.formula.gtf2.hfreq_start_khz) != 12);
@@ -2469,7 +2468,7 @@ drm_gtf2_2c(struct edid *edid)
{
const struct detailed_timing *descriptor = NULL;
- drm_for_each_detailed_block((u8 *)edid, find_gtf2, &descriptor);
+ drm_for_each_detailed_block(edid, find_gtf2, &descriptor);
BUILD_BUG_ON(offsetof(typeof(*descriptor), data.other_data.data.range.formula.gtf2.c) != 13);
@@ -2481,7 +2480,7 @@ drm_gtf2_m(struct edid *edid)
{
const struct detailed_timing *descriptor = NULL;
- drm_for_each_detailed_block((u8 *)edid, find_gtf2, &descriptor);
+ drm_for_each_detailed_block(edid, find_gtf2, &descriptor);
BUILD_BUG_ON(offsetof(typeof(*descriptor), data.other_data.data.range.formula.gtf2.m) != 14);
@@ -2493,7 +2492,7 @@ drm_gtf2_k(struct edid *edid)
{
const struct detailed_timing *descriptor = NULL;
- drm_for_each_detailed_block((u8 *)edid, find_gtf2, &descriptor);
+ drm_for_each_detailed_block(edid, find_gtf2, &descriptor);
BUILD_BUG_ON(offsetof(typeof(*descriptor), data.other_data.data.range.formula.gtf2.k) != 16);
@@ -2505,7 +2504,7 @@ drm_gtf2_2j(struct edid *edid)
{
const struct detailed_timing *descriptor = NULL;
- drm_for_each_detailed_block((u8 *)edid, find_gtf2, &descriptor);
+ drm_for_each_detailed_block(edid, find_gtf2, &descriptor);
BUILD_BUG_ON(offsetof(typeof(*descriptor), data.other_data.data.range.formula.gtf2.j) != 17);
@@ -3055,8 +3054,7 @@ add_inferred_modes(struct drm_connector *connector, struct edid *edid)
};
if (version_greater(edid, 1, 0))
- drm_for_each_detailed_block((u8 *)edid, do_inferred_modes,
- &closure);
+ drm_for_each_detailed_block(edid, do_inferred_modes, &closure);
return closure.modes;
}
@@ -3135,8 +3133,8 @@ add_established_modes(struct drm_connector *connector, struct edid *edid)
}
if (version_greater(edid, 1, 0))
- drm_for_each_detailed_block((u8 *)edid,
- do_established_modes, &closure);
+ drm_for_each_detailed_block(edid, do_established_modes,
+ &closure);
return modes + closure.modes;
}
@@ -3194,7 +3192,7 @@ add_standard_modes(struct drm_connector *connector, struct edid *edid)
}
if (version_greater(edid, 1, 0))
- drm_for_each_detailed_block((u8 *)edid, do_standard_modes,
+ drm_for_each_detailed_block(edid, do_standard_modes,
&closure);
/* XXX should also look for standard codes in VTB blocks */
@@ -3274,7 +3272,7 @@ add_cvt_modes(struct drm_connector *connector, struct edid *edid)
};
if (version_greater(edid, 1, 2))
- drm_for_each_detailed_block((u8 *)edid, do_cvt_mode, &closure);
+ drm_for_each_detailed_block(edid, do_cvt_mode, &closure);
/* XXX should also look for CVT codes in VTB blocks */
@@ -3334,7 +3332,7 @@ add_detailed_modes(struct drm_connector *connector, struct edid *edid,
closure.preferred =
(edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING);
- drm_for_each_detailed_block((u8 *)edid, do_detailed_mode, &closure);
+ drm_for_each_detailed_block(edid, do_detailed_mode, &closure);
return closure.modes;
}
@@ -4535,7 +4533,7 @@ static int get_monitor_name(struct edid *edid, char name[13])
if (!edid || !name)
return 0;
- drm_for_each_detailed_block((u8 *)edid, monitor_name, &edid_name);
+ drm_for_each_detailed_block(edid, monitor_name, &edid_name);
for (mnl = 0; edid_name && mnl < 13; mnl++) {
if (edid_name[mnl] == 0x0a)
break;
@@ -5281,7 +5279,7 @@ void drm_get_monitor_range(struct drm_connector *connector,
if (!version_greater(edid, 1, 1))
return;
- drm_for_each_detailed_block((u8 *)edid, get_monitor_range,
+ drm_for_each_detailed_block(edid, get_monitor_range,
&info->monitor_range);
DRM_DEBUG_KMS("Supported Monitor Refresh rate range is %d Hz - %d Hz\n",
--
2.38.1