#include "display/intel_crt.h"
#include "display/intel_ddi.h"
+#include "display/intel_display_debugfs.h"
#include "display/intel_dp.h"
#include "display/intel_dp_mst.h"
#include "display/intel_dpll_mgr.h"
return ERR_PTR(ret);
}
+static int intel_crtc_late_register(struct drm_crtc *crtc)
+{
+ intel_crtc_debugfs_add(crtc);
+ return 0;
+}
+
#define INTEL_CRTC_FUNCS \
.gamma_set = drm_atomic_helper_legacy_gamma_set, \
.set_config = drm_atomic_helper_set_config, \
.atomic_destroy_state = intel_crtc_destroy_state, \
.set_crc_source = intel_crtc_set_crc_source, \
.verify_crc_source = intel_crtc_verify_crc_source, \
- .get_crc_sources = intel_crtc_get_crc_sources
+ .get_crc_sources = intel_crtc_get_crc_sources, \
+ .late_register = intel_crtc_late_register
static const struct drm_crtc_funcs bdw_crtc_funcs = {
INTEL_CRTC_FUNCS,
#include "intel_pm.h"
#include "intel_psr.h"
#include "intel_sideband.h"
+#include "intel_sprite.h"
static inline struct drm_i915_private *node_to_i915(struct drm_info_node *node)
{
}
}
+#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_VBLANK_EVADE)
+static void crtc_updates_info(struct seq_file *m,
+ struct intel_crtc *crtc,
+ const char *hdr)
+{
+ u64 count;
+ int row;
+
+ count = 0;
+ for (row = 0; row < ARRAY_SIZE(crtc->debug.vbl.times); row++)
+ count += crtc->debug.vbl.times[row];
+ seq_printf(m, "%sUpdates: %llu\n", hdr, count);
+ if (!count)
+ return;
+
+ for (row = 0; row < ARRAY_SIZE(crtc->debug.vbl.times); row++) {
+ char columns[80] = " |";
+ unsigned int x;
+
+ if (row & 1) {
+ const char *units;
+
+ if (row > 10) {
+ x = 1000000;
+ units = "ms";
+ } else {
+ x = 1000;
+ units = "us";
+ }
+
+ snprintf(columns, sizeof(columns), "%4ld%s |",
+ DIV_ROUND_CLOSEST(BIT(row + 9), x), units);
+ }
+
+ if (crtc->debug.vbl.times[row]) {
+ x = ilog2(crtc->debug.vbl.times[row]);
+ memset(columns + 8, '*', x);
+ columns[8 + x] = '\0';
+ }
+
+ seq_printf(m, "%s%s\n", hdr, columns);
+ }
+
+ seq_printf(m, "%sMin update: %lluns\n",
+ hdr, crtc->debug.vbl.min);
+ seq_printf(m, "%sMax update: %lluns\n",
+ hdr, crtc->debug.vbl.max);
+ seq_printf(m, "%sAverage update: %lluns\n",
+ hdr, div64_u64(crtc->debug.vbl.sum, count));
+ seq_printf(m, "%sOverruns > %uus: %u\n",
+ hdr, VBLANK_EVASION_TIME_US, crtc->debug.vbl.over);
+}
+
+static int crtc_updates_show(struct seq_file *m, void *data)
+{
+ crtc_updates_info(m, m->private, "");
+ return 0;
+}
+
+static int crtc_updates_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, crtc_updates_show, inode->i_private);
+}
+
+static ssize_t crtc_updates_write(struct file *file,
+ const char __user *ubuf,
+ size_t len, loff_t *offp)
+{
+ struct seq_file *m = file->private_data;
+ struct intel_crtc *crtc = m->private;
+
+ /* May race with an update. Meh. */
+ memset(&crtc->debug.vbl, 0, sizeof(crtc->debug.vbl));
+
+ return len;
+}
+
+static const struct file_operations crtc_updates_fops = {
+ .owner = THIS_MODULE,
+ .open = crtc_updates_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = crtc_updates_write
+};
+
+static void crtc_updates_add(struct drm_crtc *crtc)
+{
+ debugfs_create_file("i915_update_info", 0644, crtc->debugfs_entry,
+ to_intel_crtc(crtc), &crtc_updates_fops);
+}
+
+#else
+static void crtc_updates_info(struct seq_file *m,
+ struct intel_crtc *crtc,
+ const char *hdr)
+{
+}
+
+static void crtc_updates_add(struct drm_crtc *crtc)
+{
+}
+#endif
+
static void intel_crtc_info(struct seq_file *m, struct intel_crtc *crtc)
{
struct drm_i915_private *dev_priv = node_to_i915(m->private);
seq_printf(m, "\tunderrun reporting: cpu=%s pch=%s\n",
yesno(!crtc->cpu_fifo_underrun_disabled),
yesno(!crtc->pch_fifo_underrun_disabled));
+
+ crtc_updates_info(m, crtc, "\t");
}
static int i915_display_info(struct seq_file *m, void *unused)
return 0;
}
+
+/**
+ * intel_crtc_debugfs_add - add i915 specific crtc debugfs files
+ * @crtc: pointer to a drm_crtc
+ *
+ * Returns 0 on success, negative error codes on error.
+ *
+ * Failure to add debugfs entries should generally be ignored.
+ */
+int intel_crtc_debugfs_add(struct drm_crtc *crtc)
+{
+ if (!crtc->debugfs_entry)
+ return -ENODEV;
+
+ crtc_updates_add(crtc);
+ return 0;
+}
1000 * adjusted_mode->crtc_htotal);
}
-/* FIXME: We should instead only take spinlocks once for the entire update
- * instead of once per mmio. */
-#if IS_ENABLED(CONFIG_PROVE_LOCKING)
-#define VBLANK_EVASION_TIME_US 250
-#else
-#define VBLANK_EVASION_TIME_US 100
-#endif
-
/**
* intel_pipe_update_start() - start update of a set of display registers
* @new_crtc_state: the new crtc state
local_irq_disable();
}
+#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_VBLANK_EVADE)
+static void dbg_vblank_evade(struct intel_crtc *crtc, ktime_t end)
+{
+ u64 delta = ktime_to_ns(ktime_sub(end, crtc->debug.start_vbl_time));
+ unsigned int h;
+
+ h = ilog2(delta >> 9);
+ if (h >= ARRAY_SIZE(crtc->debug.vbl.times))
+ h = ARRAY_SIZE(crtc->debug.vbl.times) - 1;
+ crtc->debug.vbl.times[h]++;
+
+ crtc->debug.vbl.sum += delta;
+ if (!crtc->debug.vbl.min || delta < crtc->debug.vbl.min)
+ crtc->debug.vbl.min = delta;
+ if (delta > crtc->debug.vbl.max)
+ crtc->debug.vbl.max = delta;
+
+ if (delta > 1000 * VBLANK_EVASION_TIME_US) {
+ drm_dbg_kms(crtc->base.dev,
+ "Atomic update on pipe (%c) took %lld us, max time under evasion is %u us\n",
+ pipe_name(crtc->pipe),
+ div_u64(delta, 1000),
+ VBLANK_EVASION_TIME_US);
+ crtc->debug.vbl.over++;
+ }
+}
+#else
+static void dbg_vblank_evade(struct intel_crtc *crtc, ktime_t end) {}
+#endif
+
/**
* intel_pipe_update_end() - end update of a set of display registers
* @new_crtc_state: the new crtc state
crtc->debug.min_vbl, crtc->debug.max_vbl,
crtc->debug.scanline_start, scanline_end);
}
-#ifdef CONFIG_DRM_I915_DEBUG_VBLANK_EVADE
- else if (ktime_us_delta(end_vbl_time, crtc->debug.start_vbl_time) >
- VBLANK_EVASION_TIME_US)
- drm_warn(&dev_priv->drm,
- "Atomic update on pipe (%c) took %lld us, max time under evasion is %u us\n",
- pipe_name(pipe),
- ktime_us_delta(end_vbl_time, crtc->debug.start_vbl_time),
- VBLANK_EVASION_TIME_US);
-#endif
+
+ dbg_vblank_evade(crtc, end_vbl_time);
}
int intel_plane_check_stride(const struct intel_plane_state *plane_state)
projects / linux-platform-drivers-x86.git / commitdiff