Commit eb30b445 authored by Jocelyn Falempe's avatar Jocelyn Falempe
Browse files

drm/log: Do not draw if drm_master is taken 



When userspace takes drm_master, the drm_client buffer is no more
visible, so drm_log shouldn't waste CPU cycle to draw on it.

Signed-off-by: default avatarJocelyn Falempe <jfalempe@redhat.com>
Reviewed-by: default avatarThomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20241204160014.1171469-4-jfalempe@redhat.com
parent f7b42442

drivers/gpu/drm/clients/drm_log.c

+8 −2
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ 


#include "drm_client_internal.h"

#include "drm_draw_internal.h"

#include "drm_internal.h"



MODULE_AUTHOR("Jocelyn Falempe");

MODULE_DESCRIPTION("DRM boot logger");
@@ -308,9 +309,14 @@ static void drm_log_write_thread(struct console *con, struct nbcon_write_context 
	if (!dlog->probed)

		drm_log_init_client(dlog);



	/* Check that we are still the master before drawing */

	if (drm_master_internal_acquire(dlog->client.dev)) {

		drm_master_internal_release(dlog->client.dev);



		for (i = 0; i < dlog->n_scanout; i++)

			drm_log_draw_kmsg_record(&dlog->scanout[i], wctxt->outbuf, wctxt->len);

	}

}



static void drm_log_lock(struct console *con, unsigned long *flags)

{