From 3b4258475e905d8b051c2a1565919e61a1c1606e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Joaqu=C3=ADn=20Ignacio=20Aramend=C3=ADa?=
 <samsagax@gmail.com>
Date: Mon, 24 Oct 2022 08:33:59 -0300
Subject: drm/amd/display: Revert logic for plane modifiers
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Git-commit: 809734c110548dca410fb0cca52e6b1540319f5e
Patch-mainline: v6.1-rc3
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 jsc#PED-2849

This file was split in commit 5d945cbcd4b16a29d6470a80dfb19738f9a4319f
("drm/amd/display: Create a file dedicated to planes") and the logic in
dm_plane_format_mod_supported() function got changed by a switch logic.
That change broke drm_plane modifiers setting on series 5000 APUs
(tested on OXP mini AMD 5800U and HP Dev One 5850U PRO)
leading to Gamescope not working as reported on GitHub[1]

To reproduce the issue, enter a TTY and run:

$ gamescope -- vkcube

With said commit applied it will abort. This one restores the old logic,
fixing the issue that affects Gamescope.

[1](https://github.com/Plagman/gamescope/issues/624)

Cc: <stable@vger.kernel.org> # 6.0.x
Signed-off-by: Joaquín Ignacio Aramendía <samsagax@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 .../amd/display/amdgpu_dm/amdgpu_dm_plane.c   | 50 +++----------------
 1 file changed, 7 insertions(+), 43 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
index 987bde4dca3d..af239b5565ae 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
@@ -1369,7 +1369,7 @@ static bool dm_plane_format_mod_supported(struct drm_plane *plane,
 {
 	struct amdgpu_device *adev = drm_to_adev(plane->dev);
 	const struct drm_format_info *info = drm_format_info(format);
-	struct hw_asic_id asic_id = adev->dm.dc->ctx->asic_id;
+	int i;
 
 	enum dm_micro_swizzle microtile = modifier_gfx9_swizzle_mode(modifier) & 3;
 
@@ -1386,49 +1386,13 @@ static bool dm_plane_format_mod_supported(struct drm_plane *plane,
 		return true;
 	}
 
-	/* check if swizzle mode is supported by this version of DCN */
-	switch (asic_id.chip_family) {
-	case FAMILY_SI:
-	case FAMILY_CI:
-	case FAMILY_KV:
-	case FAMILY_CZ:
-	case FAMILY_VI:
-		/* asics before AI does not have modifier support */
-		return false;
-	case FAMILY_AI:
-	case FAMILY_RV:
-	case FAMILY_NV:
-	case FAMILY_VGH:
-	case FAMILY_YELLOW_CARP:
-	case AMDGPU_FAMILY_GC_10_3_6:
-	case AMDGPU_FAMILY_GC_10_3_7:
-		switch (AMD_FMT_MOD_GET(TILE, modifier)) {
-		case AMD_FMT_MOD_TILE_GFX9_64K_R_X:
-		case AMD_FMT_MOD_TILE_GFX9_64K_D_X:
-		case AMD_FMT_MOD_TILE_GFX9_64K_S_X:
-		case AMD_FMT_MOD_TILE_GFX9_64K_D:
-			return true;
-		default:
-			return false;
-		}
-		break;
-	case AMDGPU_FAMILY_GC_11_0_0:
-	case AMDGPU_FAMILY_GC_11_0_1:
-		switch (AMD_FMT_MOD_GET(TILE, modifier)) {
-		case AMD_FMT_MOD_TILE_GFX11_256K_R_X:
-		case AMD_FMT_MOD_TILE_GFX9_64K_R_X:
-		case AMD_FMT_MOD_TILE_GFX9_64K_D_X:
-		case AMD_FMT_MOD_TILE_GFX9_64K_S_X:
-		case AMD_FMT_MOD_TILE_GFX9_64K_D:
-			return true;
-		default:
-			return false;
-		}
-		break;
-	default:
-		ASSERT(0); /* Unknown asic */
-		break;
+	/* Check that the modifier is on the list of the plane's supported modifiers. */
+	for (i = 0; i < plane->modifier_count; i++) {
+		if (modifier == plane->modifiers[i])
+			break;
 	}
+	if (i == plane->modifier_count)
+		return false;
 
 	/*
 	 * For D swizzle the canonical modifier depends on the bpp, so check
-- 
2.38.1