[igt-dev] [PATCH i-g-t] igt/pm_rpm: Handle no-KMS gracefully

[Ville Syrjälä]

On Tue, Oct 02, 2018 at 04:36:07PM +0100, Chris Wilson wrote:
> If KMS is not supported, drmGetResources() will return NULL so be
> careful not to dereference it. However, we still insist that runtime pm
> works, so keep on testing.
> 
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

> ---
>  tests/pm_rpm.c | 71 +++++++++++++++++++++++++++++++-------------------
>  1 file changed, 44 insertions(+), 27 deletions(-)
> 
> diff --git a/tests/pm_rpm.c b/tests/pm_rpm.c
> index 2d6c5b49c..7488efd74 100644
> --- a/tests/pm_rpm.c
> +++ b/tests/pm_rpm.c
> @@ -220,9 +220,10 @@ static bool wait_for_active(void)
>  
>  static void disable_all_screens_dpms(struct mode_set_data *data)
>  {
> -	int i;
> +	if (!data->res)
> +		return;
>  
> -	for (i = 0; i < data->res->count_connectors; i++) {
> +	for (int i = 0; i < data->res->count_connectors; i++) {
>  		drmModeConnectorPtr c = data->connectors[i];
>  
>  		kmstest_set_connector_dpms(drm_fd, c, DRM_MODE_DPMS_OFF);
> @@ -231,7 +232,8 @@ static void disable_all_screens_dpms(struct mode_set_data *data)
>  
>  static void disable_all_screens(struct mode_set_data *data)
>  {
> -	kmstest_unset_all_crtcs(drm_fd, data->res);
> +	if (data->res)
> +		kmstest_unset_all_crtcs(drm_fd, data->res);
>  }
>  
>  #define disable_all_screens_and_wait(data) do { \
> @@ -256,11 +258,13 @@ static bool init_modeset_params_for_type(struct mode_set_data *data,
>  					 struct modeset_params *params,
>  					 enum screen_type type)
>  {
> -	int i;
>  	drmModeConnectorPtr connector = NULL;
>  	drmModeModeInfoPtr mode = NULL;
>  
> -	for (i = 0; i < data->res->count_connectors; i++) {
> +	if (!data->res)
> +		return false;
> +
> +	for (int i = 0; i < data->res->count_connectors; i++) {
>  		drmModeConnectorPtr c = data->connectors[i];
>  
>  		if (type == SCREEN_TYPE_LPSP &&
> @@ -386,34 +390,31 @@ static drmModePropertyBlobPtr get_connector_edid(drmModeConnectorPtr connector,
>  
>  static void init_mode_set_data(struct mode_set_data *data)
>  {
> -	int i;
> -
>  	data->res = drmModeGetResources(drm_fd);
> -	igt_assert(data->res);
> -	igt_assert(data->res->count_connectors <= MAX_CONNECTORS);
> +	if (data->res) {
> +		igt_assert(data->res->count_connectors <= MAX_CONNECTORS);
> +		for (int i = 0; i < data->res->count_connectors; i++) {
> +			data->connectors[i] = drmModeGetConnectorCurrent(drm_fd,
> +									 data->res->connectors[i]);
> +			data->edids[i] = get_connector_edid(data->connectors[i], i);
> +		}
>  
> -	for (i = 0; i < data->res->count_connectors; i++) {
> -		data->connectors[i] = drmModeGetConnectorCurrent(drm_fd,
> -						data->res->connectors[i]);
> -		data->edids[i] = get_connector_edid(data->connectors[i], i);
> +		kmstest_set_vt_graphics_mode();
>  	}
>  
>  	data->devid = intel_get_drm_devid(drm_fd);
> -
> -	kmstest_set_vt_graphics_mode();
> -
>  	init_modeset_cached_params(&ms_data);
>  }
>  
>  static void fini_mode_set_data(struct mode_set_data *data)
>  {
> -	int i;
> -
> -	for (i = 0; i < data->res->count_connectors; i++) {
> -		drmModeFreeConnector(data->connectors[i]);
> -		drmModeFreePropertyBlob(data->edids[i]);
> +	if (data->res) {
> +		for (int i = 0; i < data->res->count_connectors; i++) {
> +			drmModeFreeConnector(data->connectors[i]);
> +			drmModeFreePropertyBlob(data->edids[i]);
> +		}
> +		drmModeFreeResources(data->res);
>  	}
> -	drmModeFreeResources(data->res);
>  }
>  
>  static void get_drm_info(struct compare_data *data)
> @@ -421,7 +422,8 @@ static void get_drm_info(struct compare_data *data)
>  	int i;
>  
>  	data->res = drmModeGetResources(drm_fd);
> -	igt_assert(data->res);
> +	if (!data->res)
> +		return;
>  
>  	igt_assert(data->res->count_connectors <= MAX_CONNECTORS);
>  	igt_assert(data->res->count_encoders <= MAX_ENCODERS);
> @@ -445,6 +447,9 @@ static void free_drm_info(struct compare_data *data)
>  {
>  	int i;
>  
> +	if (!data->res)
> +		return;
> +
>  	for (i = 0; i < data->res->count_connectors; i++) {
>  		drmModeFreeConnector(data->connectors[i]);
>  		drmModeFreePropertyBlob(data->edids[i]);
> @@ -545,6 +550,12 @@ static void assert_drm_infos_equal(struct compare_data *d1,
>  {
>  	int i;
>  
> +	if (d1->res == d2->res)
> +		return;
> +
> +	igt_assert(d1->res);
> +	igt_assert(d2->res);
> +
>  	assert_drm_resources_equal(d1, d2);
>  
>  	for (i = 0; i < d1->res->count_connectors; i++) {
> @@ -572,9 +583,12 @@ static bool edid_is_valid(const unsigned char *edid)
>  
>  static int count_drm_valid_edids(struct mode_set_data *data)
>  {
> -	int i, ret = 0;
> +	int ret = 0;
>  
> -	for (i = 0; i < data->res->count_connectors; i++)
> +	if (!data->res)
> +		return 0;
> +
> +	for (int i = 0; i < data->res->count_connectors; i++)
>  		if (data->edids[i] && edid_is_valid(data->edids[i]->data))
>  			ret++;
>  	return ret;
> @@ -635,9 +649,12 @@ static int count_i2c_valid_edids(void)
>  
>  static int count_vga_outputs(struct mode_set_data *data)
>  {
> -	int i, count = 0;
> +	int count = 0;
> +
> +	if (!data->res)
> +		return 0;
>  
> -	for (i = 0; i < data->res->count_connectors; i++)
> +	for (int i = 0; i < data->res->count_connectors; i++)
>  		if (data->connectors[i]->connector_type ==
>  		    DRM_MODE_CONNECTOR_VGA)
>  			count++;
> -- 
> 2.19.0
> 
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> igt-dev at lists.freedesktop.org
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-- 
Ville Syrjälä
Intel