[igt-dev] [PATCH i-g-t 3/4] tests/core_hotunplug: Don't apply i915 workarounds on other platforms

[Janusz Krzysztofik]

Starting from commit 0edabd8a4a08 ("core_hotunplug: fix audio unbind
logic") audio modules are unloaded unconditionally before graphics driver
unbind.  This is required for i915 to be unbound cleanly from a graphics
device.  However, we have no indications that non-Intel platforms require
the same.

Since we care for other platforms using this test and contributing to it,
not developing their own, keep i915 workarounds limited to i915 devices.

Signed-off-by: Janusz Krzysztofik <janusz.krzysztofik at linux.intel.com>
---
 tests/core_hotunplug.c | 58 +++++++++++++++++++++++-------------------
 1 file changed, 32 insertions(+), 26 deletions(-)

diff --git a/tests/core_hotunplug.c b/tests/core_hotunplug.c
index c3756889c2..29cb26ab12 100644
--- a/tests/core_hotunplug.c
+++ b/tests/core_hotunplug.c
@@ -55,6 +55,7 @@ struct hotunplug {
 	bool need_healthcheck;
 	bool has_intel_perf;
  	char *snd_driver;
+	int chipset;
 };
 
 /* Helpers */
@@ -140,19 +141,20 @@ static void prepare(struct hotunplug *priv)
 static void driver_unbind(struct hotunplug *priv, const char *prefix,
 			  int timeout)
 {
-	/*
-	 * FIXME: on some devices, the audio driver (snd_hda_intel)
-	 * binds into the i915 driver. On such hardware, kernel warnings
-	 * and errors may happen if i915 is unbind/removed before removing
-	 * first the audio driver.
-	 * So, add a logic that unloads the audio driver before trying to
-	 * unbind i915 driver, reloading it when binding again.
-	 */
-	if (igt_audio_driver_unload(&priv->snd_driver)) {
-		igt_skip("Audio driver %s in use, skipping test\n",
-			 priv->snd_driver);
-	} else if (priv->snd_driver) {
-		igt_info("Unloaded audio driver %s\n", priv->snd_driver);
+	if (priv->chipset == DRIVER_INTEL) {
+		/*
+		 * FIXME: on some devices, the audio driver (snd_hda_intel)
+		 * binds into the i915 driver. On such hardware, kernel warnings
+		 * and errors may happen if i915 is unbind/removed before removing
+		 * first the audio driver.
+		 * So, add a logic that unloads the audio driver before trying to
+		 * unbind i915 driver, reloading it when binding again.
+		 */
+		if (igt_audio_driver_unload(&priv->snd_driver))
+			igt_skip("Audio driver %s in use, skipping test\n",
+				 priv->snd_driver);
+		else if (priv->snd_driver)
+			igt_info("Unloaded audio driver %s\n", priv->snd_driver);
 	}
 
 	local_debug("%sunbinding the driver from the device\n", prefix);
@@ -198,19 +200,20 @@ static void device_unplug(struct hotunplug *priv, const char *prefix,
 {
 	igt_require(priv->fd.sysfs_dev == -1);
 
-	/*
-	 * FIXME: on some devices, the audio driver (snd_hda_intel)
-	 * binds into the i915 driver. On such hardware, kernel warnings
-	 * and errors may happen if i915 is unbind/removed before removing
-	 * first the audio driver.
-	 * So, add a logic that unloads the audio driver before trying to
-	 * unbind i915 driver, reloading it when binding again.
-	 */
-	if (igt_audio_driver_unload(&priv->snd_driver)) {
-		igt_skip("Audio driver %s in use, skipping test\n",
-			 priv->snd_driver);
-	} else if (priv->snd_driver) {
-		igt_info("Unloaded audio driver %s\n", priv->snd_driver);
+	if (priv->chipset == DRIVER_INTEL) {
+		/*
+		 * FIXME: on some devices, the audio driver (snd_hda_intel)
+		 * binds into the i915 driver. On such hardware, kernel warnings
+		 * and errors may happen if i915 is unbind/removed before removing
+		 * first the audio driver.
+		 * So, add a logic that unloads the audio driver before trying to
+		 * unbind i915 driver, reloading it when binding again.
+		 */
+		if (igt_audio_driver_unload(&priv->snd_driver))
+			igt_skip("Audio driver %s in use, skipping test\n",
+				 priv->snd_driver);
+		else if (priv->snd_driver)
+			igt_info("Unloaded audio driver %s\n", priv->snd_driver);
 	}
 
 	priv->fd.sysfs_dev = openat(priv->fd.sysfs_bus, priv->dev_bus_addr,
@@ -625,6 +628,7 @@ igt_main
 		.need_healthcheck = true,
 		.has_intel_perf = false,
 		.snd_driver	= NULL,
+		.chipset	= DRIVER_ANY,
 	};
 
 	igt_fixture {
@@ -634,6 +638,8 @@ igt_main
 		igt_skip_on_f(fd_drm < 0, "No known DRM device found\n");
 
 		if (is_i915_device(fd_drm)) {
+			priv.chipset = DRIVER_INTEL;
+
 			gem_quiescent_gpu(fd_drm);
 			igt_require_gem(fd_drm);
 
-- 
2.25.1