This enables us to pass command buffers to the kernel which trigger an event on the DRM fd upon completion. The final goal is to enable asynchronous operation of the G2D engine, similar to async page flips.
Passing the event userdata pointer through the G2D context was chosen to not change the current API (e.g. by adding a userdata argument to each public functions).
v2: Add g2d_config_event() to Exynos symbol test. Signed-off-by: Tobias Jakobi tjakobi@math.uni-bielefeld.de --- exynos/exynos-symbol-check | 1 + exynos/exynos_fimg2d.c | 27 +++++++++++++++++++++++++-- exynos/exynos_fimg2d.h | 2 ++ 3 files changed, 28 insertions(+), 2 deletions(-)
diff --git a/exynos/exynos-symbol-check b/exynos/exynos-symbol-check index c3ddbe4..bb12315 100755 --- a/exynos/exynos-symbol-check +++ b/exynos/exynos-symbol-check @@ -27,6 +27,7 @@ g2d_blend g2d_copy g2d_copy_with_scale g2d_exec +g2d_config_event g2d_fini g2d_init g2d_scale_and_blend diff --git a/exynos/exynos_fimg2d.c b/exynos/exynos_fimg2d.c index 86ae898..3a5f20a 100644 --- a/exynos/exynos_fimg2d.c +++ b/exynos/exynos_fimg2d.c @@ -202,8 +202,15 @@ static int g2d_flush(struct g2d_context *ctx) cmdlist.cmd_buf = (uint64_t)(uintptr_t)&ctx->cmd_buf[0]; cmdlist.cmd_nr = ctx->cmd_nr; cmdlist.cmd_buf_nr = ctx->cmd_buf_nr; - cmdlist.event_type = G2D_EVENT_NOT; - cmdlist.user_data = 0; + + if (ctx->event_userdata) { + cmdlist.event_type = G2D_EVENT_NONSTOP; + cmdlist.user_data = (uint64_t)(uintptr_t)(ctx->event_userdata); + ctx->event_userdata = NULL; + } else { + cmdlist.event_type = G2D_EVENT_NOT; + cmdlist.user_data = 0; + }
ctx->cmd_nr = 0; ctx->cmd_buf_nr = 0; @@ -259,6 +266,22 @@ void g2d_fini(struct g2d_context *ctx) }
/** + * g2d_config_event - setup userdata configuration for a g2d event. + * The next invocation of a g2d call (e.g. g2d_solid_fill) is + * then going to flag the command buffer as 'nonstop'. + * Completion of the command buffer execution can then be + * determined by using drmHandleEvent on the DRM fd. + * The userdata is 'consumed' in the process. + * + * @ctx: a pointer to g2d_context structure. + * @userdata: a pointer to the user data + */ +void g2d_config_event(struct g2d_context *ctx, void *userdata) +{ + ctx->event_userdata = userdata; +} + +/** * g2d_exec - start the dma to process all commands summited by g2d_flush(). * * @ctx: a pointer to g2d_context structure. diff --git a/exynos/exynos_fimg2d.h b/exynos/exynos_fimg2d.h index 9db0c88..421249d 100644 --- a/exynos/exynos_fimg2d.h +++ b/exynos/exynos_fimg2d.h @@ -298,10 +298,12 @@ struct g2d_context { unsigned int cmd_nr; unsigned int cmd_buf_nr; unsigned int cmdlist_nr; + void *event_userdata; };
struct g2d_context *g2d_init(int fd); void g2d_fini(struct g2d_context *ctx); +void g2d_config_event(struct g2d_context *ctx, void *userdata); int g2d_exec(struct g2d_context *ctx); int g2d_solid_fill(struct g2d_context *ctx, struct g2d_image *img, unsigned int x, unsigned int y, unsigned int w,