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drm/arcpgu: Opt in debugfs 

This change adopts debugfs usage for outputting useful data.
As of today we print:
 * Mode and real HW clock values
 * Standard FB info

Code is heavily borrowed from ARM's HDLCD thus adding Liviu in Cc.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Reviewed-by: Liviu Dudau <Liviu.Dudau@arm.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: David Airlie <airlied@linux.ie>
Cc: Jose Abreu <joabreu@synopsys.com>
This commit is contained in:
Alexey Brodkin 2017-03-03 15:30:35 +03:00 committed by Alexey Brodkin
parent dd24df6570
commit 13eee77065
1 changed files with 29 additions and 0 deletions
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29
drivers/gpu/drm/arc/arcpgu_drv.c
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@ -160,6 +160,32 @@ static int arcpgu_unload(struct drm_device *drm)
return 0;
}
#ifdef CONFIG_DEBUG_FS
static int arcpgu_show_pxlclock(struct seq_file *m, void *arg)
{
struct drm_info_node *node = (struct drm_info_node *)m->private;
struct drm_device *drm = node->minor->dev;
struct arcpgu_drm_private *arcpgu = drm->dev_private;
unsigned long clkrate = clk_get_rate(arcpgu->clk);
unsigned long mode_clock = arcpgu->crtc.mode.crtc_clock * 1000;
seq_printf(m, "hw : %lu\n", clkrate);
seq_printf(m, "mode: %lu\n", mode_clock);
return 0;
}
static struct drm_info_list arcpgu_debugfs_list[] = {
{ "clocks", arcpgu_show_pxlclock, 0 },
{ "fb", drm_fb_cma_debugfs_show, 0 },
};
static int arcpgu_debugfs_init(struct drm_minor *minor)
{
return drm_debugfs_create_files(arcpgu_debugfs_list,
ARRAY_SIZE(arcpgu_debugfs_list), minor->debugfs_root, minor);
}
#endif
static struct drm_driver arcpgu_drm_driver = {
.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME |
DRIVER_ATOMIC,
@ -185,6 +211,9 @@ static struct drm_driver arcpgu_drm_driver = {
.gem_prime_vmap = drm_gem_cma_prime_vmap,
.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
.gem_prime_mmap = drm_gem_cma_prime_mmap,
#ifdef CONFIG_DEBUG_FS
.debugfs_init = arcpgu_debugfs_init,
#endif
};
static int arcpgu_probe(struct platform_device *pdev)