diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 4542f8b8c8f0..0c4b95fb6bd9 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -97,7 +97,7 @@ static int oui(u8 first, u8 second, u8 third)
 
 struct detailed_mode_closure {
 	struct drm_connector *connector;
-	struct edid *edid;
+	const struct edid *edid;
 	bool preferred;
 	u32 quirks;
 	int modes;
@@ -2424,7 +2424,7 @@ is_rb(const struct detailed_timing *descriptor, void *data)
 
 /* EDID 1.4 defines this explicitly.  For EDID 1.3, we guess, badly. */
 static bool
-drm_monitor_supports_rb(struct edid *edid)
+drm_monitor_supports_rb(const struct edid *edid)
 {
 	if (edid->revision >= 4) {
 		bool ret = false;
@@ -2453,7 +2453,7 @@ find_gtf2(const struct detailed_timing *descriptor, void *data)
 
 /* Secondary GTF curve kicks in above some break frequency */
 static int
-drm_gtf2_hbreak(struct edid *edid)
+drm_gtf2_hbreak(const struct edid *edid)
 {
 	const struct detailed_data_monitor_range *range = NULL;
 
@@ -2466,7 +2466,7 @@ drm_gtf2_hbreak(struct edid *edid)
 }
 
 static int
-drm_gtf2_2c(struct edid *edid)
+drm_gtf2_2c(const struct edid *edid)
 {
 	const struct detailed_data_monitor_range *range = NULL;
 
@@ -2479,7 +2479,7 @@ drm_gtf2_2c(struct edid *edid)
 }
 
 static int
-drm_gtf2_m(struct edid *edid)
+drm_gtf2_m(const struct edid *edid)
 {
 	const struct detailed_data_monitor_range *range = NULL;
 
@@ -2492,7 +2492,7 @@ drm_gtf2_m(struct edid *edid)
 }
 
 static int
-drm_gtf2_k(struct edid *edid)
+drm_gtf2_k(const struct edid *edid)
 {
 	const struct detailed_data_monitor_range *range = NULL;
 
@@ -2505,7 +2505,7 @@ drm_gtf2_k(struct edid *edid)
 }
 
 static int
-drm_gtf2_2j(struct edid *edid)
+drm_gtf2_2j(const struct edid *edid)
 {
 	const struct detailed_data_monitor_range *range = NULL;
 
@@ -2521,7 +2521,7 @@ drm_gtf2_2j(struct edid *edid)
  * standard_timing_level - get std. timing level(CVT/GTF/DMT)
  * @edid: EDID block to scan
  */
-static int standard_timing_level(struct edid *edid)
+static int standard_timing_level(const struct edid *edid)
 {
 	if (edid->revision >= 2) {
 		if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF))
@@ -2564,7 +2564,7 @@ static int drm_mode_hsync(const struct drm_display_mode *mode)
  * and convert them into a real mode using CVT/GTF/DMT.
  */
 static struct drm_display_mode *
-drm_mode_std(struct drm_connector *connector, struct edid *edid,
+drm_mode_std(struct drm_connector *connector, const struct edid *edid,
 	     const struct std_timing *t)
 {
 	struct drm_device *dev = connector->dev;
@@ -2726,7 +2726,7 @@ drm_mode_do_interlace_quirk(struct drm_display_mode *mode,
  * return a new struct drm_display_mode.
  */
 static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
-						  struct edid *edid,
+						  const struct edid *edid,
 						  const struct detailed_timing *timing,
 						  u32 quirks)
 {
@@ -2826,7 +2826,7 @@ static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
 
 static bool
 mode_in_hsync_range(const struct drm_display_mode *mode,
-		    struct edid *edid, const u8 *t)
+		    const struct edid *edid, const u8 *t)
 {
 	int hsync, hmin, hmax;
 
@@ -2843,7 +2843,7 @@ mode_in_hsync_range(const struct drm_display_mode *mode,
 
 static bool
 mode_in_vsync_range(const struct drm_display_mode *mode,
-		    struct edid *edid, const u8 *t)
+		    const struct edid *edid, const u8 *t)
 {
 	int vsync, vmin, vmax;
 
@@ -2859,7 +2859,7 @@ mode_in_vsync_range(const struct drm_display_mode *mode,
 }
 
 static u32
-range_pixel_clock(struct edid *edid, const u8 *t)
+range_pixel_clock(const struct edid *edid, const u8 *t)
 {
 	/* unspecified */
 	if (t[9] == 0 || t[9] == 255)
@@ -2874,7 +2874,7 @@ range_pixel_clock(struct edid *edid, const u8 *t)
 }
 
 static bool
-mode_in_range(const struct drm_display_mode *mode, struct edid *edid,
+mode_in_range(const struct drm_display_mode *mode, const struct edid *edid,
 	      const struct detailed_timing *timing)
 {
 	u32 max_clock;
@@ -2920,7 +2920,7 @@ static bool valid_inferred_mode(const struct drm_connector *connector,
 }
 
 static int
-drm_dmt_modes_for_range(struct drm_connector *connector, struct edid *edid,
+drm_dmt_modes_for_range(struct drm_connector *connector, const struct edid *edid,
 			const struct detailed_timing *timing)
 {
 	int i, modes = 0;
@@ -2955,7 +2955,7 @@ void drm_mode_fixup_1366x768(struct drm_display_mode *mode)
 }
 
 static int
-drm_gtf_modes_for_range(struct drm_connector *connector, struct edid *edid,
+drm_gtf_modes_for_range(struct drm_connector *connector, const struct edid *edid,
 			const struct detailed_timing *timing)
 {
 	int i, modes = 0;
@@ -2984,7 +2984,7 @@ drm_gtf_modes_for_range(struct drm_connector *connector, struct edid *edid,
 }
 
 static int
-drm_cvt_modes_for_range(struct drm_connector *connector, struct edid *edid,
+drm_cvt_modes_for_range(struct drm_connector *connector, const struct edid *edid,
 			const struct detailed_timing *timing)
 {
 	int i, modes = 0;
@@ -3052,7 +3052,7 @@ do_inferred_modes(const struct detailed_timing *timing, void *c)
 }
 
 static int
-add_inferred_modes(struct drm_connector *connector, struct edid *edid)
+add_inferred_modes(struct drm_connector *connector, const struct edid *edid)
 {
 	struct detailed_mode_closure closure = {
 		.connector = connector,
@@ -3114,7 +3114,7 @@ do_established_modes(const struct detailed_timing *timing, void *c)
  * (defined above).  Tease them out and add them to the global modes list.
  */
 static int
-add_established_modes(struct drm_connector *connector, struct edid *edid)
+add_established_modes(struct drm_connector *connector, const struct edid *edid)
 {
 	struct drm_device *dev = connector->dev;
 	unsigned long est_bits = edid->established_timings.t1 |
@@ -3151,7 +3151,7 @@ do_standard_modes(const struct detailed_timing *timing, void *c)
 	struct detailed_mode_closure *closure = c;
 	const struct edid_display_descriptor *data = &timing->data.descriptor;
 	struct drm_connector *connector = closure->connector;
-	struct edid *edid = closure->edid;
+	const struct edid *edid = closure->edid;
 	int i;
 
 	if (!is_display_descriptor(timing, EDID_DETAIL_STD_MODES))
@@ -3178,7 +3178,7 @@ do_standard_modes(const struct detailed_timing *timing, void *c)
  * GTF or CVT. Grab them from @edid and add them to the list.
  */
 static int
-add_standard_modes(struct drm_connector *connector, struct edid *edid)
+add_standard_modes(struct drm_connector *connector, const struct edid *edid)
 {
 	int i, modes = 0;
 	struct detailed_mode_closure closure = {
@@ -3270,7 +3270,7 @@ do_cvt_mode(const struct detailed_timing *timing, void *c)
 }
 
 static int
-add_cvt_modes(struct drm_connector *connector, struct edid *edid)
+add_cvt_modes(struct drm_connector *connector, const struct edid *edid)
 {
 	struct detailed_mode_closure closure = {
 		.connector = connector,
@@ -3324,7 +3324,7 @@ do_detailed_mode(const struct detailed_timing *timing, void *c)
  * @quirks: quirks to apply
  */
 static int
-add_detailed_modes(struct drm_connector *connector, struct edid *edid,
+add_detailed_modes(struct drm_connector *connector, const struct edid *edid,
 		   u32 quirks)
 {
 	struct detailed_mode_closure closure = {
@@ -4531,7 +4531,7 @@ monitor_name(const struct detailed_timing *timing, void *data)
 	*res = timing->data.descriptor.data.str.str;
 }
 
-static int get_monitor_name(struct edid *edid, char name[13])
+static int get_monitor_name(const struct edid *edid, char name[13])
 {
 	const char *edid_name = NULL;
 	int mnl;
