drm/radeon: use a fetch function to get the edid

We keep a cached version of the edid in radeon_connector which
we use for determining connectedness and when to enable certain
features like hdmi audio, etc.  When the user uses the firmware
interface to override the driver with some other edid the driver's
copy is never updated.  The fetch function will check if there
is a user supplied edid and update the driver's copy if there
is.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=80691

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

7 files changed, 33 insertions, 16 deletions

diff --git a/drivers/gpu/drm/radeon/atombios_encoders.c b/drivers/gpu/drm/radeon/atombios_encoders.c
index 34fe641c3b51..a7f2ddf09a9d 100644
--- a/drivers/gpu/drm/radeon/atombios_encoders.c
+++ b/drivers/gpu/drm/radeon/atombios_encoders.c
@@ -716,7 +716,7 @@ atombios_get_encoder_mode(struct drm_encoder *encoder)
                         if (radeon_connector->use_digital &&
                             (radeon_connector->audio == RADEON_AUDIO_ENABLE))
                                 return ATOM_ENCODER_MODE_HDMI;
-                        else if (drm_detect_hdmi_monitor(radeon_connector->edid) &&
+                        else if (drm_detect_hdmi_monitor(radeon_connector_edid(connector)) &&
                                  (radeon_connector->audio == RADEON_AUDIO_AUTO))
                                 return ATOM_ENCODER_MODE_HDMI;
                         else if (radeon_connector->use_digital)
@@ -735,7 +735,7 @@ atombios_get_encoder_mode(struct drm_encoder *encoder)
                 if (radeon_audio != 0) {
                         if (radeon_connector->audio == RADEON_AUDIO_ENABLE)
                                 return ATOM_ENCODER_MODE_HDMI;
-                        else if (drm_detect_hdmi_monitor(radeon_connector->edid) &&
+                        else if (drm_detect_hdmi_monitor(radeon_connector_edid(connector)) &&
                                  (radeon_connector->audio == RADEON_AUDIO_AUTO))
                                 return ATOM_ENCODER_MODE_HDMI;
                         else
@@ -755,7 +755,7 @@ atombios_get_encoder_mode(struct drm_encoder *encoder)
                 } else if (radeon_audio != 0) {
                         if (radeon_connector->audio == RADEON_AUDIO_ENABLE)
                                 return ATOM_ENCODER_MODE_HDMI;
-                        else if (drm_detect_hdmi_monitor(radeon_connector->edid) &&
+                        else if (drm_detect_hdmi_monitor(radeon_connector_edid(connector)) &&
                                  (radeon_connector->audio == RADEON_AUDIO_AUTO))
                                 return ATOM_ENCODER_MODE_HDMI;
                         else
diff --git a/drivers/gpu/drm/radeon/dce6_afmt.c b/drivers/gpu/drm/radeon/dce6_afmt.c
index edcf1598da6b..ab29f953a767 100644
--- a/drivers/gpu/drm/radeon/dce6_afmt.c
+++ b/drivers/gpu/drm/radeon/dce6_afmt.c
@@ -175,7 +175,7 @@ void dce6_afmt_write_speaker_allocation(struct drm_encoder *encoder)
                 return;
         }
 
-        sad_count = drm_edid_to_speaker_allocation(radeon_connector->edid, &sadb);
+        sad_count = drm_edid_to_speaker_allocation(radeon_connector_edid(connector), &sadb);
         if (sad_count <= 0) {
                 DRM_ERROR("Couldn't read Speaker Allocation Data Block: %d\n", sad_count);
                 return;
@@ -238,7 +238,7 @@ void dce6_afmt_write_sad_regs(struct drm_encoder *encoder)
                 return;
         }
 
-        sad_count = drm_edid_to_sad(radeon_connector->edid, &sads);
+        sad_count = drm_edid_to_sad(radeon_connector_edid(connector), &sads);
         if (sad_count <= 0) {
                 DRM_ERROR("Couldn't read SADs: %d\n", sad_count);
                 return;
diff --git a/drivers/gpu/drm/radeon/evergreen_hdmi.c b/drivers/gpu/drm/radeon/evergreen_hdmi.c
index 1ec0e6e83f9f..278c7a139d74 100644
--- a/drivers/gpu/drm/radeon/evergreen_hdmi.c
+++ b/drivers/gpu/drm/radeon/evergreen_hdmi.c
@@ -117,7 +117,7 @@ static void dce4_afmt_write_speaker_allocation(struct drm_encoder *encoder)
                 return;
         }
 
-        sad_count = drm_edid_to_speaker_allocation(radeon_connector->edid, &sadb);
+        sad_count = drm_edid_to_speaker_allocation(radeon_connector_edid(connector), &sadb);
         if (sad_count <= 0) {
                 DRM_ERROR("Couldn't read Speaker Allocation Data Block: %d\n", sad_count);
                 return;
@@ -172,7 +172,7 @@ static void evergreen_hdmi_write_sad_regs(struct drm_encoder *encoder)
                 return;
         }
 
-        sad_count = drm_edid_to_sad(radeon_connector->edid, &sads);
+        sad_count = drm_edid_to_sad(radeon_connector_edid(connector), &sads);
         if (sad_count <= 0) {
                 DRM_ERROR("Couldn't read SADs: %d\n", sad_count);
                 return;
diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c
index 5b5d28ad9ba5..1651defb2df7 100644
--- a/drivers/gpu/drm/radeon/radeon_connectors.c
+++ b/drivers/gpu/drm/radeon/radeon_connectors.c
@@ -107,7 +107,7 @@ int radeon_get_monitor_bpc(struct drm_connector *connector)
         case DRM_MODE_CONNECTOR_DVII:
         case DRM_MODE_CONNECTOR_HDMIB:
                 if (radeon_connector->use_digital) {
-                        if (drm_detect_hdmi_monitor(radeon_connector->edid)) {
+                        if (drm_detect_hdmi_monitor(radeon_connector_edid(connector))) {
                                 if (connector->display_info.bpc)
                                         bpc = connector->display_info.bpc;
                         }
@@ -115,7 +115,7 @@ int radeon_get_monitor_bpc(struct drm_connector *connector)
                 break;
         case DRM_MODE_CONNECTOR_DVID:
         case DRM_MODE_CONNECTOR_HDMIA:
-                if (drm_detect_hdmi_monitor(radeon_connector->edid)) {
+                if (drm_detect_hdmi_monitor(radeon_connector_edid(connector))) {
                         if (connector->display_info.bpc)
                                 bpc = connector->display_info.bpc;
                 }
@@ -124,7 +124,7 @@ int radeon_get_monitor_bpc(struct drm_connector *connector)
                 dig_connector = radeon_connector->con_priv;
                 if ((dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT) ||
                     (dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_eDP) ||
-                    drm_detect_hdmi_monitor(radeon_connector->edid)) {
+                    drm_detect_hdmi_monitor(radeon_connector_edid(connector))) {
                         if (connector->display_info.bpc)
                                 bpc = connector->display_info.bpc;
                 }
@@ -148,7 +148,7 @@ int radeon_get_monitor_bpc(struct drm_connector *connector)
                 break;
         }
 
-        if (drm_detect_hdmi_monitor(radeon_connector->edid)) {
+        if (drm_detect_hdmi_monitor(radeon_connector_edid(connector))) {
                 /* hdmi deep color only implemented on DCE4+ */
                 if ((bpc > 8) && !ASIC_IS_DCE4(rdev)) {
                         DRM_DEBUG("%s: HDMI deep color %d bpc unsupported. Using 8 bpc.\n",
@@ -262,6 +262,21 @@ static struct drm_encoder *radeon_find_encoder(struct drm_connector *connector,
         return NULL;
 }
 
+struct edid *radeon_connector_edid(struct drm_connector *connector)
+{
+        struct radeon_connector *radeon_connector = to_radeon_connector(connector);
+        struct drm_property_blob *edid_blob = connector->edid_blob_ptr;
+
+        if (radeon_connector->edid) {
+                return radeon_connector->edid;
+        } else if (edid_blob) {
+                struct edid *edid = kmemdup(edid_blob->data, edid_blob->length, GFP_KERNEL);
+                if (edid)
+                        radeon_connector->edid = edid;
+        }
+        return radeon_connector->edid;
+}
+
 static void radeon_connector_get_edid(struct drm_connector *connector)
 {
         struct drm_device *dev = connector->dev;
@@ -1366,7 +1381,7 @@ static int radeon_dvi_mode_valid(struct drm_connector *connector,
                     (radeon_connector->connector_object_id == CONNECTOR_OBJECT_ID_DUAL_LINK_DVI_D) ||
                     (radeon_connector->connector_object_id == CONNECTOR_OBJECT_ID_HDMI_TYPE_B))
                         return MODE_OK;
-                else if (ASIC_IS_DCE6(rdev) && drm_detect_hdmi_monitor(radeon_connector->edid)) {
+                else if (ASIC_IS_DCE6(rdev) && drm_detect_hdmi_monitor(radeon_connector_edid(connector))) {
                         /* HDMI 1.3+ supports max clock of 340 Mhz */
                         if (mode->clock > 340000)
                                 return MODE_CLOCK_HIGH;
@@ -1660,7 +1675,7 @@ static int radeon_dp_mode_valid(struct drm_connector *connector,
                     (radeon_dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_eDP)) {
                         return radeon_dp_mode_valid_helper(connector, mode);
                 } else {
-                        if (ASIC_IS_DCE6(rdev) && drm_detect_hdmi_monitor(radeon_connector->edid)) {
+                        if (ASIC_IS_DCE6(rdev) && drm_detect_hdmi_monitor(radeon_connector_edid(connector))) {
                                 /* HDMI 1.3+ supports max clock of 340 Mhz */
                                 if (mode->clock > 340000)
                                         return MODE_CLOCK_HIGH;
diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index 004f30c170f6..a966074a4fba 100644
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -1691,7 +1691,7 @@ bool radeon_crtc_scaling_mode_fixup(struct drm_crtc *crtc,
                             (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) &&
                             ((radeon_encoder->underscan_type == UNDERSCAN_ON) ||
                              ((radeon_encoder->underscan_type == UNDERSCAN_AUTO) &&
-                              drm_detect_hdmi_monitor(radeon_connector->edid) &&
+                              drm_detect_hdmi_monitor(radeon_connector_edid(connector)) &&
                               is_hdtv_mode(mode)))) {
                                 if (radeon_encoder->underscan_hborder != 0)
                                         radeon_crtc->h_border = radeon_encoder->underscan_hborder;
diff --git a/drivers/gpu/drm/radeon/radeon_encoders.c b/drivers/gpu/drm/radeon/radeon_encoders.c
index bd4959ca23aa..3c2094c25b53 100644
--- a/drivers/gpu/drm/radeon/radeon_encoders.c
+++ b/drivers/gpu/drm/radeon/radeon_encoders.c
@@ -343,7 +343,7 @@ bool radeon_dig_monitor_is_duallink(struct drm_encoder *encoder,
         case DRM_MODE_CONNECTOR_HDMIB:
                 if (radeon_connector->use_digital) {
                         /* HDMI 1.3 supports up to 340 Mhz over single link */
-                        if (ASIC_IS_DCE6(rdev) && drm_detect_hdmi_monitor(radeon_connector->edid)) {
+                        if (ASIC_IS_DCE6(rdev) && drm_detect_hdmi_monitor(radeon_connector_edid(connector))) {
                                 if (pixel_clock > 340000)
                                         return true;
                                 else
@@ -365,7 +365,7 @@ bool radeon_dig_monitor_is_duallink(struct drm_encoder *encoder,
                         return false;
                 else {
                         /* HDMI 1.3 supports up to 340 Mhz over single link */
-                        if (ASIC_IS_DCE6(rdev) && drm_detect_hdmi_monitor(radeon_connector->edid)) {
+                        if (ASIC_IS_DCE6(rdev) && drm_detect_hdmi_monitor(radeon_connector_edid(connector))) {
                                 if (pixel_clock > 340000)
                                         return true;
                                 else
diff --git a/drivers/gpu/drm/radeon/radeon_mode.h b/drivers/gpu/drm/radeon/radeon_mode.h
index 9c2bfcd3576e..9ccae81c7d88 100644
--- a/drivers/gpu/drm/radeon/radeon_mode.h
+++ b/drivers/gpu/drm/radeon/radeon_mode.h
@@ -689,6 +689,8 @@ extern bool radeon_connector_encoder_is_hbr2(struct drm_connector *connector);
 extern bool radeon_connector_is_dp12_capable(struct drm_connector *connector);
 extern int radeon_get_monitor_bpc(struct drm_connector *connector);
 
+extern struct edid *radeon_connector_edid(struct drm_connector *connector);
+
 extern void radeon_connector_hotplug(struct drm_connector *connector);
 extern int radeon_dp_mode_valid_helper(struct drm_connector *connector,
                                        struct drm_display_mode *mode);