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[rpi] Inherit framebuffer BPP value from the VideoCore firmware

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Instead of using hardcoded bpp of 24, obtain current/configured value
from VideoCore. This solves certain problems with Xorg/Qt apps that
require bpp of 32 to work properly. The mode can be forced by setting
framebuffer_depth value in config.txt

PR:		235363
Submitted by:	Steve Peurifoy <ssw01@mathistry.net>
This commit is contained in:
Oleksandr Tymoshenko 2019-09-08 09:47:21 +00:00
parent 8c50ee012f
commit c344416ecd
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=352028
3 changed files with 35 additions and 1 deletions
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8
sys/arm/broadcom/bcm2835/bcm2835_fbd.c
View File

@ -85,7 +85,13 @@ bcm_fb_init(struct bcmsc_softc *sc, struct bcm2835_fb_config *fb)
memset(fb, 0, sizeof(*fb));
if (bcm2835_mbox_fb_get_w_h(fb) != 0)
return (ENXIO);
fb->bpp = FB_DEPTH;
if (bcm2835_mbox_fb_get_bpp(fb) != 0)
return (ENXIO);
if (fb->bpp < FB_DEPTH) {
device_printf(sc->dev, "changing fb bpp from %d to %d\n", fb->bpp, FB_DEPTH);
fb->bpp = FB_DEPTH;
} else
device_printf(sc->dev, "keeping existing fb bpp of %d\n", fb->bpp);
fb->vxres = fb->xres;
fb->vyres = fb->yres;

20
sys/arm/broadcom/bcm2835/bcm2835_mbox.c
View File

@ -498,6 +498,26 @@ bcm2835_mbox_fb_get_w_h(struct bcm2835_fb_config *fb)
return (err);
}
int
bcm2835_mbox_fb_get_bpp(struct bcm2835_fb_config *fb)
{
int err;
struct msg_fb_get_bpp msg;
memset(&msg, 0, sizeof(msg));
msg.hdr.buf_size = sizeof(msg);
msg.hdr.code = BCM2835_MBOX_CODE_REQ;
BCM2835_MBOX_INIT_TAG(&msg.bpp, GET_DEPTH);
msg.bpp.tag_hdr.val_len = 0;
msg.end_tag = 0;
err = bcm2835_mbox_property(&msg, sizeof(msg));
if (err == 0)
fb->bpp = msg.bpp.body.resp.bpp;
return (err);
}
int
bcm2835_mbox_fb_init(struct bcm2835_fb_config *fb)
{

8
sys/arm/broadcom/bcm2835/bcm2835_mbox_prop.h
View File

@ -474,6 +474,14 @@ struct msg_fb_get_w_h {
int bcm2835_mbox_fb_get_w_h(struct bcm2835_fb_config *);
struct msg_fb_get_bpp {
struct bcm2835_mbox_hdr hdr;
struct bcm2835_mbox_tag_depth bpp;
uint32_t end_tag;
};
int bcm2835_mbox_fb_get_bpp(struct bcm2835_fb_config *);
struct msg_fb_setup {
struct bcm2835_mbox_hdr hdr;
struct bcm2835_mbox_tag_fb_w_h physical_w_h;