[igt-dev] [v4 08/10] tests/i915/kms_dsc: enable validation for vdsc fractional bpp
Swati Sharma
swati2.sharma at intel.com
Fri Jul 28 07:49:11 UTC 2023
Intel hardware supports fractional bpp from display_ver >= 14.
To test fractional bpp, debugfs entry (force_dsc_fractional_bpp)
is introduced. From the IGT; we are setting this debugfs entry.
However, before setting this debugfs entry, we are checking
capability i.e. fractional bpp is supported by platform and sink
both. In driver, if force_dsc_fractional_bpp is set then while
iterating over output bpp with fractional step size we will
continue if output_bpp is computed as integer and allow DSC iff
compressed bpp is fractional.
v2: -change in igt_describe (Ankit)
v3: -rebase
v4: -add wrapper for source support of fractional bpp (Ankit)
Signed-off-by: Swati Sharma <swati2.sharma at intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>
---
tests/i915/kms_dsc.c | 23 ++++++++++++
tests/i915/kms_dsc_helper.c | 71 +++++++++++++++++++++++++++++++++++++
tests/i915/kms_dsc_helper.h | 4 +++
3 files changed, 98 insertions(+)
diff --git a/tests/i915/kms_dsc.c b/tests/i915/kms_dsc.c
index cf99e6faa..8733f13d1 100644
--- a/tests/i915/kms_dsc.c
+++ b/tests/i915/kms_dsc.c
@@ -41,6 +41,7 @@ IGT_TEST_DESCRIPTION("Test to validate display stream compression");
#define TEST_DSC_BPC (1<<0)
#define TEST_DSC_FORMAT (1<<1)
#define TEST_DSC_OUTPUT_FORMAT (1<<2)
+#define TEST_DSC_FRACTIONAL_BPP (1<<3)
typedef struct {
int drm_fd;
@@ -143,6 +144,12 @@ static void update_display(data_t *data, uint32_t test_type)
force_dsc_output_format(data->drm_fd, data->output, data->output_format);
}
+ if (test_type & TEST_DSC_FRACTIONAL_BPP) {
+ igt_debug("DSC fractional bpp is supported on %s\n", data->output->name);
+ save_force_dsc_fractional_bpp_en(data->drm_fd, data->output);
+ force_dsc_fractional_bpp_enable(data->drm_fd, data->output);
+ }
+
igt_output_set_pipe(output, data->pipe);
primary = igt_output_get_plane_type(output, DRM_PLANE_TYPE_PRIMARY);
@@ -202,6 +209,7 @@ static void update_display(data_t *data, uint32_t test_type)
enabled ? "ON" : "OFF");
restore_force_dsc_en();
+ restore_force_dsc_fractional_bpp_en();
if (test_type & TEST_DSC_BPC) {
current_bpc = igt_get_pipe_current_bpc(data->drm_fd, data->pipe);
@@ -250,6 +258,11 @@ static void test_dsc(data_t *data, uint32_t test_type, int bpc,
data->output, data->output_format)))
continue;
+ if ((test_type & TEST_DSC_FRACTIONAL_BPP) &&
+ (!is_dsc_fractional_bpp_supported(data->disp_ver,
+ data->drm_fd, data->output)))
+ continue;
+
if (!check_gen11_dp_constraint(data->drm_fd, data->output, data->pipe))
continue;
@@ -366,6 +379,16 @@ igt_main_args("l", NULL, help_str, opt_handler, &data)
}
}
+ igt_describe("Tests fractional compressed bpp functionality if supported "
+ "by a connector by forcing fractional_bpp on all connectors that support it "
+ "with default parameter. While finding the optimum compressed bpp, driver will "
+ "skip over the compressed bpps with integer values. It will go ahead with DSC, "
+ "iff compressed bpp is fractional, failing in which, it will fail the commit.");
+ igt_subtest_with_dynamic("dsc-fractional-bpp")
+ test_dsc(&data, TEST_DSC_FRACTIONAL_BPP,
+ DEFAULT_BPC, DRM_FORMAT_XRGB8888,
+ DSC_FORMAT_RGB);
+
igt_fixture {
igt_display_fini(&data.display);
drm_close_driver(data.drm_fd);
diff --git a/tests/i915/kms_dsc_helper.c b/tests/i915/kms_dsc_helper.c
index 61f76ddee..34f4e5ad4 100644
--- a/tests/i915/kms_dsc_helper.c
+++ b/tests/i915/kms_dsc_helper.c
@@ -6,7 +6,9 @@
#include "kms_dsc_helper.h"
static bool force_dsc_en_orig;
+static bool force_dsc_fractional_bpp_en_orig;
static int force_dsc_restore_fd = -1;
+static int force_dsc_fractional_bpp_restore_fd = -1;
void force_dsc_enable(int drmfd, igt_output_t *output)
{
@@ -51,6 +53,7 @@ void restore_force_dsc_en(void)
void kms_dsc_exit_handler(int sig)
{
restore_force_dsc_en();
+ restore_force_dsc_fractional_bpp_en();
}
bool is_dsc_supported_by_source(int drmfd)
@@ -143,3 +146,71 @@ bool is_dsc_output_format_supported(int drmfd, int disp_ver, igt_output_t *outpu
return true;
}
+
+void force_dsc_fractional_bpp_enable(int drmfd, igt_output_t *output)
+{
+ int ret;
+
+ igt_debug("Forcing DSC Fractional BPP on %s\n", output->name);
+ ret = igt_force_dsc_fractional_bpp_enable(drmfd, output->name);
+ igt_assert_f(ret == 0, "forcing dsc fractional bpp debugfs_write failed\n");
+}
+
+void save_force_dsc_fractional_bpp_en(int drmfd, igt_output_t *output)
+{
+ force_dsc_fractional_bpp_en_orig =
+ igt_is_force_dsc_fractional_bpp_enabled(drmfd, output->name);
+ force_dsc_fractional_bpp_restore_fd =
+ igt_get_dsc_fractional_bpp_debugfs_fd(drmfd, output->name);
+ igt_assert(force_dsc_fractional_bpp_restore_fd >= 0);
+}
+
+void restore_force_dsc_fractional_bpp_en(void)
+{
+ if (force_dsc_fractional_bpp_restore_fd < 0)
+ return;
+
+ igt_debug("Restoring DSC Fractional BPP enable\n");
+ igt_assert(write(force_dsc_fractional_bpp_restore_fd, force_dsc_fractional_bpp_en_orig ? "1" : "0", 1) == 1);
+
+ close(force_dsc_fractional_bpp_restore_fd);
+ force_dsc_fractional_bpp_restore_fd = -1;
+}
+
+static
+bool is_dsc_fractional_bpp_supported_by_sink(int drmfd, char *connector_name)
+{
+ int bpp_prec;
+
+ bpp_prec = igt_get_dsc_fractional_bpp_supported(drmfd, connector_name);
+
+ if (bpp_prec == 1)
+ return false;
+
+ return true;
+}
+
+static
+bool is_dsc_fractional_bpp_supported_by_source(int disp_ver)
+{
+ if (disp_ver < 14) {
+ igt_debug("DSC fractional bpp not supported on D13 and older platforms\n");
+ return false;
+ }
+
+ return true;
+}
+
+bool is_dsc_fractional_bpp_supported(int disp_ver, int drmfd, igt_output_t *output)
+{
+ if (is_dsc_fractional_bpp_supported_by_source(disp_ver)) {
+ if (!is_dsc_fractional_bpp_supported_by_sink(drmfd, output->name)) {
+ igt_debug("DSC fractional bpp not supported on connector %s\n",
+ output->name);
+ return false;
+ } else
+ return true;
+ }
+
+ return false;
+}
diff --git a/tests/i915/kms_dsc_helper.h b/tests/i915/kms_dsc_helper.h
index 2109bd767..9af609e12 100644
--- a/tests/i915/kms_dsc_helper.h
+++ b/tests/i915/kms_dsc_helper.h
@@ -34,5 +34,9 @@ void force_dsc_output_format(int drmfd, igt_output_t *output,
enum dsc_output_format output_format);
bool is_dsc_output_format_supported(int disp_ver, int drmfd, igt_output_t *output,
enum dsc_output_format output_format);
+void force_dsc_fractional_bpp_enable(int drmfd, igt_output_t *output);
+void save_force_dsc_fractional_bpp_en(int drmfd, igt_output_t *output);
+void restore_force_dsc_fractional_bpp_en(void);
+bool is_dsc_fractional_bpp_supported(int disp_ver, int drmfd, igt_output_t *output);
#endif
--
2.25.1
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