With current code when the framebuffer is register, screen_base is not
set yet. So when we want to access framebuffer from mmap we get a
pointer to 0x0 instead of getting the pointer to the framebuffer
address. This patch fix this bug by allocating memory for framebuffer
during probe just before registering framebuffer driver.
Signed-off-by: Gregory CLEMENT <gregory.clement@xxxxxxxxxxxxxxxxxx>
---
drivers/video/stm.c | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/drivers/video/stm.c b/drivers/video/stm.c
index f0abe4c..8a9acff 100644
--- a/drivers/video/stm.c
+++ b/drivers/video/stm.c
@@ -480,6 +480,7 @@ static int stmfb_probe(struct device_d *hw_dev)
{
struct imx_fb_videomode *pdata = hw_dev->platform_data;
int ret;
+ unsigned size;
/* just init */
fbi.info.priv = &fbi;
@@ -497,6 +498,15 @@ static int stmfb_probe(struct device_d *hw_dev)
fbi.info.yres = fbi.info.mode->yres;
fbi.info.bits_per_pixel = 16;
+ size = calc_line_length(fbi.info.mode->xres, fbi.info.bits_per_pixel) *
+ fbi.info.mode->yres;
+
+ ret = stmfb_memory_mmgt(&fbi.info, size);
+ if (ret != 0) {
+ dev_err(hw_dev, "Cannot allocate framebuffer memory\n");
+ return ret;
+ }
+
ret = register_framebuffer(&fbi.info);
if (ret != 0) {
dev_err(hw_dev, "Failed to register framebuffer\n");
--
1.7.0.4
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