[PATCH 3/3] modetest: add atomic page flip support
Emil Velikov
emil.l.velikov at gmail.com
Tue Sep 1 17:43:41 PDT 2015
On 26 August 2015 at 07:21, Hyungwon Hwang <human.hwang at samsung.com> wrote:
> This patch adds support for atomic page flip. User can specify -V option
> with the plane id for testing atomic page flipping.
> ---
> tests/modetest/modetest.c | 153 ++++++++++++++++++++++++++++++++++++++++++++--
> 1 file changed, 149 insertions(+), 4 deletions(-)
>
> diff --git a/tests/modetest/modetest.c b/tests/modetest/modetest.c
> index 753a559..9bffa98 100644
> --- a/tests/modetest/modetest.c
> +++ b/tests/modetest/modetest.c
> @@ -719,6 +719,10 @@ struct pipe_arg {
> struct timeval start;
>
> int swap_count;
> +
> + /* for atomic modeset */
> + uint32_t plane_id;
> + uint32_t fb_obj_id;
> };
>
> struct plane_arg {
> @@ -1444,7 +1448,7 @@ static int parse_property(struct property_arg *p, const char *arg)
>
> static void usage(char *name)
> {
> - fprintf(stderr, "usage: %s [-acDdefMPpsCvw]\n", name);
> + fprintf(stderr, "usage: %s [-acDdefMPpsCvVw]\n", name);
> fprintf(stderr, "\tA: supported in atomic modeset\n");
> fprintf(stderr, "\tL: supported in legacy modeset\n");
>
> @@ -1459,6 +1463,7 @@ static void usage(char *name)
>
> fprintf(stderr, "\n Atomic Test options: [A]\n\n");
> fprintf(stderr, "\t-a\tuse atomic modeset\n");
> + fprintf(stderr, "\t-V <flipping_plane_id>\ttest vsynced page flipping\n");
>
> fprintf(stderr, "\n Legacy test options: [L]\n\n");
> fprintf(stderr, "\t-P <crtc_id>:<w>x<h>[+<x>+<y>][*<scale>][@<format>]\tset a plane\n");
> @@ -1627,7 +1632,138 @@ static void atomic_modeset(struct device *dev, drmModeAtomicReqPtr req,
> drmModeAtomicCommit(dev->fd, req, flags, NULL);
> }
>
> -static char optstr[] = "acdD:efM:P:ps:Cvw:";
> +static void
> +atomic_page_flip_handler(int fd, unsigned int frame,
> + unsigned int sec, unsigned int usec, void *data)
> +{
> + static drmModeAtomicReqPtr req = NULL;
> + unsigned int new_fb_id;
> + struct timeval end;
> + struct pipe_arg *pipe;
> + double t;
> + uint32_t flags = 0;
> +
> + pipe = (struct pipe_arg *)(unsigned long)data;
> +
> + if (pipe->current_fb_id == pipe->fb_id[0])
> + new_fb_id = pipe->fb_id[1];
> + else
> + new_fb_id = pipe->fb_id[0];
> +
> + pipe->current_fb_id = new_fb_id;
> + pipe->swap_count++;
> +
> + req = drmModeAtomicAlloc();
> +
> + drmModeAtomicAddProperty(req, pipe->plane_id, pipe->fb_obj_id, new_fb_id);
> +
We'll crash badly if req is NULL here. I guess we can smoke test the
API, but that is no excuse for the missing null check.
> + flags = DRM_MODE_PAGE_FLIP_EVENT;
> + drmModeAtomicCommit(fd, req, flags, pipe);
> +
> + if (pipe->swap_count == 60) {
> + gettimeofday(&end, NULL);
> + t = end.tv_sec + end.tv_usec * 1e-6 -
> + (pipe->start.tv_sec + pipe->start.tv_usec * 1e-6);
> + fprintf(stderr, "freq: %.02fHz\n", pipe->swap_count / t);
> + pipe->swap_count = 0;
> + pipe->start = end;
> + }
> +
> + drmModeAtomicFree(req);
> +}
> +
> +static int atomic_test_page_flip(struct device *dev, drmModeAtomicReqPtr req,
> + struct resources *res, struct property_arg *prop_args,
> + unsigned int prop_count,unsigned int plane_id)
> +{
> + struct bo *other_bo;
> + unsigned int other_fb_id;
> + struct pipe_arg *pipe = NULL;
> + drmEventContext evctx;
> + uint32_t flags = 0, fb_obj_id = 0, pixel_format;
> + uint64_t width, height;
> + int ret;
> +
> + if (!is_obj_id_in_prop_args(prop_args, prop_count, plane_id))
> + return -1;
> +
> + fb_obj_id = get_atomic_plane_prop_id(res, plane_id, "FB_ID");
> + if (!fb_obj_id)
> + return -1;
> +
> + width = get_value_in_prop_args(prop_args, prop_count, plane_id,
> + "SRC_W");
> + height = get_value_in_prop_args(prop_args, prop_count, plane_id,
> + "SRC_H");
Here and in the previous patch you assume that always succeeds.
Perhaps one should check it otherwise all sort of crazy stuff will
happen in allocate_fb() ?
> + pixel_format = DRM_FORMAT_XRGB8888;
> +
For the future we might consider making this user configurable,
although as is it looks like a good default.
> + ret = allocate_fb(dev, req, res, width, height, pixel_format,
> + PATTERN_TILES, &other_bo, &other_fb_id);
> + if (ret < 0)
> + return ret;
> +
> + ret = drmModeAtomicAddProperty(req, plane_id, fb_obj_id,
> + other_fb_id);
> + if (ret < 0)
Why do you return 'success' here ?
> + goto err;
> +
> + if (!fb_obj_id) {
Here (and in previous patch) we're missing RmFB()
Leaking other_bo.
> + fprintf(stderr, "page flipping requires at least one plane setting.\n");
> + return -1;
> + }
> +
> + pipe = drmMalloc(sizeof *pipe);
Please use calloc.
> +
> + gettimeofday(&pipe->start, NULL);
> + pipe->swap_count = 0;
> + pipe->plane_id = plane_id;
> + pipe->fb_obj_id = fb_obj_id;
> + pipe->fb_id[0] = dev->mode.fb_id;
> + pipe->fb_id[1] = other_fb_id;
> + pipe->current_fb_id = other_fb_id;
> +
> + flags = DRM_MODE_PAGE_FLIP_EVENT;
> +
> + ret = drmModeAtomicCommit(dev->fd, req, flags, pipe);
> + if (ret < 0)
Should you return the error code rather than 0 ?
> + goto err_rmfb;
> +
> + memset(&evctx, 0, sizeof evctx);
> + evctx.version = DRM_EVENT_CONTEXT_VERSION;
This is very bad, please don't do it.
DRM_EVENT_CONTEXT_VERSION defines the version currently present not
the one you implement/use. They might match now, but as one bumps the
define modetest build against it will end up very badly.
Seems issue is present in the 'legacy' modeset path and vbltest :'(
> + evctx.vblank_handler = NULL;
> + evctx.page_flip_handler = atomic_page_flip_handler;
> +
> + while (1) {
> + struct timeval timeout = { .tv_sec = 3, .tv_usec = 0 };
> + fd_set fds;
> + int ret;
> +
> + FD_ZERO(&fds);
> + FD_SET(0, &fds);
> + FD_SET(dev->fd, &fds);
> + ret = select(dev->fd + 1, &fds, NULL, NULL, &timeout);
> +
> + if (ret <= 0) {
> + fprintf(stderr, "select timed out or error (ret %d)\n",
> + ret);
> + continue;
> + } else if (FD_ISSET(0, &fds)) {
> + break;
> + }
> +
> + drmHandleEvent(dev->fd, &evctx);
> + }
> +
> +err_rmfb:
> + drmFree(pipe);
> + drmModeRmFB(dev->fd, other_fb_id);
> +err:
> + bo_destroy(other_bo);
> +
> + return 0;
> +}
> +
> +static char optstr[] = "acdD:efM:P:ps:CvV:w:";
>
> int main(int argc, char **argv)
> {
> @@ -1641,7 +1777,7 @@ int main(int argc, char **argv)
> const char *modules[] = { "i915", "radeon", "nouveau", "vmwgfx", "omapdrm", "exynos", "tilcdc", "msm", "sti", "tegra", "imx-drm", "rockchip", "atmel-hlcdc" };
> char *device = NULL;
> char *module = NULL;
> - unsigned int i;
> + unsigned int i, flip_plane_id = 0;
> int count = 0, plane_count = 0;
> unsigned int prop_count = 0;
> struct pipe_arg *pipe_args = NULL;
> @@ -1723,6 +1859,11 @@ int main(int argc, char **argv)
> case 'v':
> test_vsync = 1;
> break;
> + case 'V':
> + if (sscanf(optarg, "%u", &flip_plane_id) != 1)
> + usage(argv[0]);
> + test_vsync = 1;
> + break;
> case 'w':
> prop_args = realloc(prop_args,
> (prop_count + 1) * sizeof *prop_args);
> @@ -1775,7 +1916,7 @@ int main(int argc, char **argv)
> return -1;
> }
>
> - if (test_vsync && !count) {
> + if (test_vsync && (!count && !req)) {
> fprintf(stderr, "page flipping requires at least one -s option.\n");
Something doesn't match here - the top level (help) description, the
conditional and/or the error printf.
Cheers,
Emil
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