linux-kernel - [PATCH v7 05/18] drm/mediatek: Set DRM mode configs accordingly

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Message-ID: <20240502103848.5845-6-shawn.sung@mediatek.com>
Date: Thu, 2 May 2024 18:38:35 +0800
From: Shawn Sung <shawn.sung@...iatek.com>
To: Chun-Kuang Hu <chunkuang.hu@...nel.org>, AngeloGioacchino Del Regno
	<angelogioacchino.delregno@...labora.com>
CC: Philipp Zabel <p.zabel@...gutronix.de>, David Airlie <airlied@...il.com>,
	Daniel Vetter <daniel@...ll.ch>, Matthias Brugger <matthias.bgg@...il.com>,
	Bibby Hsieh <bibby.hsieh@...iatek.com>, CK Hu <ck.hu@...iatek.com>, "Nancy .
 Lin" <nancy.lin@...iatek.com>, Fei Shao <fshao@...omium.org>, Sean Paul
	<sean@...rly.run>, Jason Chen
	<jason-ch.chen@...iatek.corp-partner.google.com>,
	<dri-devel@...ts.freedesktop.org>, <linux-mediatek@...ts.infradead.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
	"Hsiao Chien Sung" <shawn.sung@...iatek.com>
Subject: [PATCH v7 05/18] drm/mediatek: Set DRM mode configs accordingly

From: Hsiao Chien Sung <shawn.sung@...iatek.com>

Set DRM mode configs limitation according to the hardware capabilities
and pass the IGT checks as below:

- The test "graphics.IgtKms.kms_plane" requires a frame buffer with
  width of 4512 pixels (> 4096).
- The test "graphics.IgtKms.kms_cursor_crc" checks if the cursor size is
  defined, and run the test with cursor size from 1x1 to 512x512.

Please notice that the test conditions may change as IGT is updated.

Signed-off-by: Hsiao Chien Sung <shawn.sung@...iatek.com>
---
 drivers/gpu/drm/mediatek/mtk_drm_drv.c | 22 ++++++++++++++++++++++
 drivers/gpu/drm/mediatek/mtk_drm_drv.h |  4 ++++
 2 files changed, 26 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index 8e047043202b4..c9cad3a827376 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -294,6 +294,9 @@ static const struct mtk_mmsys_driver_data mt8188_vdosys0_driver_data = {
 	.conn_routes = mt8188_mtk_ddp_main_routes,
 	.num_conn_routes = ARRAY_SIZE(mt8188_mtk_ddp_main_routes),
 	.mmsys_dev_num = 2,
+	.max_width = 8191,
+	.min_width = 1,
+	.min_height = 1,
 };
 
 static const struct mtk_mmsys_driver_data mt8192_mmsys_driver_data = {
@@ -308,6 +311,9 @@ static const struct mtk_mmsys_driver_data mt8195_vdosys0_driver_data = {
 	.main_path = mt8195_mtk_ddp_main,
 	.main_len = ARRAY_SIZE(mt8195_mtk_ddp_main),
 	.mmsys_dev_num = 2,
+	.max_width = 8191,
+	.min_width = 1,
+	.min_height = 1,
 };
 
 static const struct mtk_mmsys_driver_data mt8195_vdosys1_driver_data = {
@@ -315,6 +321,9 @@ static const struct mtk_mmsys_driver_data mt8195_vdosys1_driver_data = {
 	.ext_len = ARRAY_SIZE(mt8195_mtk_ddp_ext),
 	.mmsys_id = 1,
 	.mmsys_dev_num = 2,
+	.max_width = 8191,
+	.min_width = 2, /* 2-pixel align when ethdr is bypassed */
+	.min_height = 1,
 };
 
 static const struct of_device_id mtk_drm_of_ids[] = {
@@ -493,6 +502,15 @@ static int mtk_drm_kms_init(struct drm_device *drm)
 		for (j = 0; j < private->data->mmsys_dev_num; j++) {
 			priv_n = private->all_drm_private[j];
 
+			if (priv_n->data->max_width)
+				drm->mode_config.max_width = priv_n->data->max_width;
+
+			if (priv_n->data->min_width)
+				drm->mode_config.min_width = priv_n->data->min_width;
+
+			if (priv_n->data->min_height)
+				drm->mode_config.min_height = priv_n->data->min_height;
+
 			if (i == CRTC_MAIN && priv_n->data->main_len) {
 				ret = mtk_crtc_create(drm, priv_n->data->main_path,
 						      priv_n->data->main_len, j,
@@ -520,6 +538,10 @@ static int mtk_drm_kms_init(struct drm_device *drm)
 		}
 	}
 
+	/* IGT will check if the cursor size is configured */
+	drm->mode_config.cursor_width = drm->mode_config.max_width;
+	drm->mode_config.cursor_height = drm->mode_config.max_height;
+
 	/* Use OVL device for all DMA memory allocations */
 	crtc = drm_crtc_from_index(drm, 0);
 	if (crtc)
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.h b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
index 78d698ede1bf8..6cfa790e8df5c 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
@@ -46,6 +46,10 @@ struct mtk_mmsys_driver_data {
 	bool shadow_register;
 	unsigned int mmsys_id;
 	unsigned int mmsys_dev_num;
+
+	int max_width;
+	int min_width;
+	int min_height;
 };
 
 struct mtk_drm_private {
-- 
2.18.0