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video: bcm2835: respect the pitch value

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Depending on the firmware's video options [1] the active SDTV or
HDTV mode can yield a framebuffer with noncontiguous horizontal lines,
giving a messed up display, for both, u-boot and the loaded kernel.

Fix this by setting lcd_line_length to the pitch value of the configured
framebuffer.

[1] http://elinux.org/RPiconfig#Video_mode_options

Signed-off-by: Andre Heider <a.heider@gmail.com>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
This commit is contained in:
Andre Heider 2013-11-09 11:07:53 +01:00 committed by Anatolij Gustschin
parent cefa471712
commit 44376eff25
1 changed files with 11 additions and 0 deletions
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11
drivers/video/bcm2835.c
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@ -14,6 +14,8 @@ DECLARE_GLOBAL_DATA_PTR;
/* Global variables that lcd.c expects to exist */
vidinfo_t panel_info;
static u32 bcm2835_pitch;
struct msg_query {
struct bcm2835_mbox_hdr hdr;
struct bcm2835_mbox_tag_physical_w_h physical_w_h;
@ -30,6 +32,7 @@ struct msg_setup {
struct bcm2835_mbox_tag_virtual_offset virtual_offset;
struct bcm2835_mbox_tag_overscan overscan;
struct bcm2835_mbox_tag_allocate_buffer allocate_buffer;
struct bcm2835_mbox_tag_pitch pitch;
u32 end_tag;
};
@ -80,6 +83,7 @@ void lcd_ctrl_init(void *lcdbase)
msg_setup->overscan.body.req.right = 0;
BCM2835_MBOX_INIT_TAG(&msg_setup->allocate_buffer, ALLOCATE_BUFFER);
msg_setup->allocate_buffer.body.req.alignment = 0x100;
BCM2835_MBOX_INIT_TAG_NO_REQ(&msg_setup->pitch, GET_PITCH);
ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_setup->hdr);
if (ret) {
@ -90,6 +94,7 @@ void lcd_ctrl_init(void *lcdbase)
w = msg_setup->physical_w_h.body.resp.width;
h = msg_setup->physical_w_h.body.resp.height;
bcm2835_pitch = msg_setup->pitch.body.resp.pitch;
debug("bcm2835: Final resolution is %d x %d\n", w, h);
@ -103,3 +108,9 @@ void lcd_ctrl_init(void *lcdbase)
void lcd_enable(void)
{
}
int lcd_get_size(int *line_length)
{
*line_length = bcm2835_pitch;
return *line_length * panel_info.vl_row;
}