drivers/video: fsl-diu-fb: improve message displays

Add some debug and error messages that are useful during debugging.

Signed-off-by: Timur Tabi <timur@freescale.com>

diff --git a/drivers/video/fsl-diu-fb.c b/drivers/video/fsl-diu-fb.c
index f388c3a..6e32ba8 100644 (file)
--- a/drivers/video/fsl-diu-fb.c
+++ b/drivers/video/fsl-diu-fb.c
@@ -430,6 +430,22 @@ static struct mfb_info mfb_template[] = {
        },
 };
 
+#ifdef DEBUG
+static void __attribute__ ((unused)) fsl_diu_dump(struct diu __iomem *hw)
+{
+       mb();
+       pr_debug("DIU: desc=%08x,%08x,%08x, gamma=%08x pallete=%08x "
+                "cursor=%08x curs_pos=%08x diu_mode=%08x bgnd=%08x "
+                "disp_size=%08x hsyn_para=%08x vsyn_para=%08x syn_pol=%08x "
+                "thresholds=%08x int_mask=%08x plut=%08x\n",
+                hw->desc[0], hw->desc[1], hw->desc[2], hw->gamma,
+                hw->pallete, hw->cursor, hw->curs_pos, hw->diu_mode,
+                hw->bgnd, hw->disp_size, hw->hsyn_para, hw->vsyn_para,
+                hw->syn_pol, hw->thresholds, hw->int_mask, hw->plut);
+       rmb();
+}
+#endif
+
 /**
  * fsl_diu_name_to_port - convert a port name to a monitor port enum
  *
@@ -1108,6 +1124,12 @@ static int fsl_diu_ioctl(struct fb_info *info, unsigned int cmd,
 
        if (!arg)
                return -EINVAL;
+
+       dev_dbg(info->dev, "ioctl %08x (dir=%s%s type=%u nr=%u size=%u)\n", cmd,
+               _IOC_DIR(cmd) & _IOC_READ ? "R" : "",
+               _IOC_DIR(cmd) & _IOC_WRITE ? "W" : "",
+               _IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd));
+
        switch (cmd) {
        case MFB_SET_PIXFMT_OLD:
                dev_warn(info->dev,
@@ -1754,6 +1776,9 @@ static int __init fsl_diu_init(void)
        coherence_data_size = be32_to_cpup(prop) * 13;
        coherence_data_size /= 8;
 
+       pr_debug("fsl-diu-fb: coherence data size is %zu bytes\n",
+                coherence_data_size);
+
        prop = of_get_property(np, "d-cache-line-size", NULL);
        if (prop == NULL) {
                pr_err("fsl-diu-fb: missing 'd-cache-line-size' property' "
@@ -1763,10 +1788,17 @@ static int __init fsl_diu_init(void)
        }
        d_cache_line_size = be32_to_cpup(prop);
 
+       pr_debug("fsl-diu-fb: cache lines size is %u bytes\n",
+                d_cache_line_size);
+
        of_node_put(np);
        coherence_data = vmalloc(coherence_data_size);
-       if (!coherence_data)
+       if (!coherence_data) {
+               pr_err("fsl-diu-fb: could not allocate coherence data "
+                      "(size=%zu)\n", coherence_data_size);
                return -ENOMEM;
+       }
+
 #endif
 
        ret = platform_driver_register(&fsl_diu_driver);