From 94ac2ab3fff96814d7460a27a0e9d004abbd4128 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 19 Jun 2024 23:00:37 +0200
Subject: Merging upstream version 6.9.2.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 drivers/gpu/drm/mgag200/mgag200_mode.c | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

(limited to 'drivers/gpu/drm/mgag200/mgag200_mode.c')

diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c
index 0f0d59938c..e17cb4c5f7 100644
--- a/drivers/gpu/drm/mgag200/mgag200_mode.c
+++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
@@ -13,14 +13,15 @@
 
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_cache.h>
 #include <drm/drm_damage_helper.h>
+#include <drm/drm_edid.h>
 #include <drm/drm_format_helper.h>
 #include <drm/drm_fourcc.h>
 #include <drm/drm_framebuffer.h>
 #include <drm/drm_gem_atomic_helper.h>
 #include <drm/drm_gem_framebuffer_helper.h>
 #include <drm/drm_print.h>
-#include <drm/drm_probe_helper.h>
 
 #include "mgag200_drv.h"
 
@@ -436,6 +437,13 @@ static void mgag200_handle_damage(struct mga_device *mdev, const struct iosys_ma
 
 	iosys_map_incr(&dst, drm_fb_clip_offset(fb->pitches[0], fb->format, clip));
 	drm_fb_memcpy(&dst, fb->pitches, vmap, fb, clip);
+
+	/* Flushing the cache greatly improves latency on x86_64 */
+#if defined(CONFIG_DRM_MGAG200_IOBURST_WORKAROUND)
+	if (!vmap->is_iomem)
+		drm_clflush_virt_range(vmap->vaddr + clip->y1 * fb->pitches[0],
+				       drm_rect_height(clip) * fb->pitches[0]);
+#endif
 }
 
 /*
@@ -717,17 +725,23 @@ void mgag200_crtc_atomic_destroy_state(struct drm_crtc *crtc, struct drm_crtc_st
 int mgag200_vga_connector_helper_get_modes(struct drm_connector *connector)
 {
 	struct mga_device *mdev = to_mga_device(connector->dev);
-	int ret;
+	const struct drm_edid *drm_edid;
+	int count;
 
 	/*
 	 * Protect access to I/O registers from concurrent modesetting
 	 * by acquiring the I/O-register lock.
 	 */
 	mutex_lock(&mdev->rmmio_lock);
-	ret = drm_connector_helper_get_modes_from_ddc(connector);
+
+	drm_edid = drm_edid_read(connector);
+	drm_edid_connector_update(connector, drm_edid);
+	count = drm_edid_connector_add_modes(connector);
+	drm_edid_free(drm_edid);
+
 	mutex_unlock(&mdev->rmmio_lock);
 
-	return ret;
+	return count;
 }
 
 /*
-- 
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