File 0020-bcm2835-Dynamically-calculate-bytes.patch of Package u-boot

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File 0020-bcm2835-Dynamically-calculate-bytes.patch of Package u-boot (Revision 820654d4078da3f12f0549b6a9b4f2eb)

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From 480a56048a980b297da6b625af6862d2d6805ca6 Mon Sep 17 00:00:00 2001
From: "Ivan T. Ivanov" <iivanov@suse.de>
Date: Tue, 23 Jan 2024 10:07:56 +0200
Subject: [PATCH] bcm2835: Dynamically calculate bytes per pixel parameter

brcm,bcm2708-fb device provided by firmware on RPi5 uses
16 bits per pixel, so lets calculate framebuffer bytes
per pixel dynamically based on queried information.

Tested to work for RPi2b v1.2, RPi3b v1.3, RPi4b v1.1,
RPi2 Zero W, RPi5b v1.0.

Reviewed-by: Matthias Brugger <mbrugger@suse.com>
Tested-by: Jens Maus <mail@jens-maus.de>
Tested by: Darko Alavanja <darko.alavanja@konsulko.com>
Signed-off-by: Ivan T. Ivanov <iivanov@suse.de>
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
---
 drivers/video/bcm2835.c | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/drivers/video/bcm2835.c b/drivers/video/bcm2835.c
index 14942526f19..63efa762db1 100644
--- a/drivers/video/bcm2835.c
+++ b/drivers/video/bcm2835.c
@@ -16,7 +16,7 @@ static int bcm2835_video_probe(struct udevice *dev)
 	struct video_uc_plat *plat = dev_get_uclass_plat(dev);
 	struct video_priv *uc_priv = dev_get_uclass_priv(dev);
 	int ret;
-	int w, h, pitch;
+	int w, h, pitch, bpp;
 	ulong fb_base, fb_size, fb_start, fb_end;
 
 	debug("bcm2835: Query resolution...\n");
@@ -41,9 +41,23 @@ static int bcm2835_video_probe(struct udevice *dev)
 					DCACHE_WRITEBACK);
 	video_set_flush_dcache(dev, true);
 
+	bpp = pitch / w;
+	switch (bpp) {
+	case 2:
+		uc_priv->bpix = VIDEO_BPP16;
+		break;
+	case 4:
+		uc_priv->bpix = VIDEO_BPP32;
+		break;
+	default:
+		printf("bcm2835: unexpected bpp %d, pitch %d, width %d\n",
+		       bpp, pitch, w);
+		uc_priv->bpix = VIDEO_BPP32;
+		break;
+	}
+
 	uc_priv->xsize = w;
 	uc_priv->ysize = h;
-	uc_priv->bpix = VIDEO_BPP32;
 	plat->base = fb_base;
 	plat->size = fb_size;

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File 0020-bcm2835-Dynamically-calculate-bytes.patch of Package u-boot (Revision 820654d4078da3f12f0549b6a9b4f2eb)

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