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 Cc: Liviu Dudau Liviu.Dudau@arm.com Cc: Daniel Vetter daniel@ffwll.ch Cc: David Airlie airlied@linux.ie Cc: Jose Abreu joabreu@synopsys.com --- drivers/gpu/drm/arc/arcpgu_drv.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+)
diff --git a/drivers/gpu/drm/arc/arcpgu_drv.c b/drivers/gpu/drm/arc/arcpgu_drv.c index 8d8344ed655e..5c82f52fba80 100644 --- a/drivers/gpu/drm/arc/arcpgu_drv.c +++ b/drivers/gpu/drm/arc/arcpgu_drv.c @@ -161,6 +161,32 @@ 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, @@ -187,6 +213,9 @@ 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)