From 3b9a030e846dd42a53f9f5bdcdd0228bb898e01b Mon Sep 17 00:00:00 2001 From: Enrik Berkhan Date: Fri, 12 Aug 2022 16:35:19 +0200 Subject: [PATCH] hw/arm/bcm2835_property: Add support for RPI_FIRMWARE_FRAMEBUFFER_GET_NUM_DISPLAYS MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit In more recent Raspbian OS Linux kernels, the fb driver gives up immediately if RPI_FIRMWARE_FRAMEBUFFER_GET_NUM_DISPLAYS fails or no displays are reported. This change simply always reports one display. It makes bcm2835_fb work again with these more recent kernels. Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Enrik Berkhan Message-Id: <20220812143519.59134-1-Enrik.Berkhan@inka.de> Signed-off-by: Richard Henderson --- hw/misc/bcm2835_property.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/hw/misc/bcm2835_property.c b/hw/misc/bcm2835_property.c index e94e951057..890ae7bae5 100644 --- a/hw/misc/bcm2835_property.c +++ b/hw/misc/bcm2835_property.c @@ -270,6 +270,10 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value) stl_le_phys(&s->dma_as, value + 12, 0); resplen = 4; break; + case 0x00040013: /* Get number of displays */ + stl_le_phys(&s->dma_as, value + 12, 1); + resplen = 4; + break; case 0x00060001: /* Get DMA channels */ /* channels 2-5 */ -- 2.11.0