drivers/gpu/drm/tests/drm_format_helper_test.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2
   3 #include <kunit/test.h>
   4
   5 #include <drm/drm_device.h>
   6 #include <drm/drm_file.h>
   7 #include <drm/drm_format_helper.h>
   8 #include <drm/drm_fourcc.h>
   9 #include <drm/drm_framebuffer.h>
  10 #include <drm/drm_gem_framebuffer_helper.h>
  11 #include <drm/drm_mode.h>
  12 #include <drm/drm_print.h>
  13 #include <drm/drm_rect.h>
  14
  15 #include "../drm_crtc_internal.h"
  16
  17 #define TEST_BUF_SIZE 50
  18
  19 struct xrgb8888_to_rgb332_case {
  20         const char *name;
  21         unsigned int pitch;
  22         unsigned int dst_pitch;
  23         struct drm_rect clip;
  24         const u32 xrgb8888[TEST_BUF_SIZE];
  25         const u8 expected[4 * TEST_BUF_SIZE];
  26 };
  27
  28 static struct xrgb8888_to_rgb332_case xrgb8888_to_rgb332_cases[] = {
  29         {
  30                 .name = "single_pixel_source_buffer",
  31                 .pitch = 1 * 4,
  32                 .dst_pitch = 0,
  33                 .clip = DRM_RECT_INIT(0, 0, 1, 1),
  34                 .xrgb8888 = { 0x01FF0000 },
  35                 .expected = { 0xE0 },
  36         },
  37         {
  38                 .name = "single_pixel_clip_rectangle",
  39                 .pitch = 2 * 4,
  40                 .dst_pitch = 0,
  41                 .clip = DRM_RECT_INIT(1, 1, 1, 1),
  42                 .xrgb8888 = {
  43                         0x00000000, 0x00000000,
  44                         0x00000000, 0x10FF0000,
  45                 },
  46                 .expected = { 0xE0 },
  47         },
  48         {
  49                 /* Well known colors: White, black, red, green, blue, magenta,
  50                  * yellow and cyan. Different values for the X in XRGB8888 to
  51                  * make sure it is ignored. Partial clip area.
  52                  */
  53                 .name = "well_known_colors",
  54                 .pitch = 4 * 4,
  55                 .dst_pitch = 0,
  56                 .clip = DRM_RECT_INIT(1, 1, 2, 4),
  57                 .xrgb8888 = {
  58                         0x00000000, 0x00000000, 0x00000000, 0x00000000,
  59                         0x00000000, 0x11FFFFFF, 0x22000000, 0x00000000,
  60                         0x00000000, 0x33FF0000, 0x4400FF00, 0x00000000,
  61                         0x00000000, 0x550000FF, 0x66FF00FF, 0x00000000,
  62                         0x00000000, 0x77FFFF00, 0x8800FFFF, 0x00000000,
  63                 },
  64                 .expected = {
  65                         0xFF, 0x00,
  66                         0xE0, 0x1C,
  67                         0x03, 0xE3,
  68                         0xFC, 0x1F,
  69                 },
  70         },
  71         {
  72                 /* Randomly picked colors. Full buffer within the clip area. */
  73                 .name = "destination_pitch",
  74                 .pitch = 3 * 4,
  75                 .dst_pitch = 5,
  76                 .clip = DRM_RECT_INIT(0, 0, 3, 3),
  77                 .xrgb8888 = {
  78                         0xA10E449C, 0xB1114D05, 0xC1A80303,
  79                         0xD16C7073, 0xA20E449C, 0xB2114D05,
  80                         0xC2A80303, 0xD26C7073, 0xA30E449C,
  81                 },
  82                 .expected = {
  83                         0x0A, 0x08, 0xA0, 0x00, 0x00,
  84                         0x6D, 0x0A, 0x08, 0x00, 0x00,
  85                         0xA0, 0x6D, 0x0A, 0x00, 0x00,
  86                 },
  87         },
  88 };
  89
  90 /*
  91  * conversion_buf_size - Return the destination buffer size required to convert
  92  * between formats.
  93  * @dst_format: destination buffer pixel format (DRM_FORMAT_*)
  94  * @dst_pitch: Number of bytes between two consecutive scanlines within dst
  95  * @clip: Clip rectangle area to convert
  96  *
  97  * Returns:
  98  * The size of the destination buffer or negative value on error.
  99  */
 100 static size_t conversion_buf_size(u32 dst_format, unsigned int dst_pitch,
 101                                   const struct drm_rect *clip)
 102 {
 103         const struct drm_format_info *dst_fi = drm_format_info(dst_format);
 104
 105         if (!dst_fi)
 106                 return -EINVAL;
 107
 108         if (!dst_pitch)
 109                 dst_pitch = drm_rect_width(clip) * dst_fi->cpp[0];
 110
 111         return dst_pitch * drm_rect_height(clip);
 112 }
 113
 114 static void xrgb8888_to_rgb332_case_desc(struct xrgb8888_to_rgb332_case *t,
 115                                          char *desc)
 116 {
 117         strscpy(desc, t->name, KUNIT_PARAM_DESC_SIZE);
 118 }
 119
 120 KUNIT_ARRAY_PARAM(xrgb8888_to_rgb332, xrgb8888_to_rgb332_cases,
 121                   xrgb8888_to_rgb332_case_desc);
 122
 123 static void xrgb8888_to_rgb332_test(struct kunit *test)
 124 {
 125         const struct xrgb8888_to_rgb332_case *params = test->param_value;
 126         size_t dst_size;
 127         __u8 *dst = NULL;
 128
 129         struct drm_framebuffer fb = {
 130                 .format = drm_format_info(DRM_FORMAT_XRGB8888),
 131                 .pitches = { params->pitch, 0, 0 },
 132         };
 133
 134         dst_size = conversion_buf_size(DRM_FORMAT_RGB332, params->dst_pitch,
 135                                        &params->clip);
 136         KUNIT_ASSERT_GT(test, dst_size, 0);
 137
 138         dst = kunit_kzalloc(test, dst_size, GFP_KERNEL);
 139         KUNIT_ASSERT_NOT_ERR_OR_NULL(test, dst);
 140
 141         drm_fb_xrgb8888_to_rgb332(dst, params->dst_pitch, params->xrgb8888,
 142                                   &fb, &params->clip);
 143         KUNIT_EXPECT_EQ(test, memcmp(dst, params->expected, dst_size), 0);
 144 }
 145
 146 static struct kunit_case drm_format_helper_test_cases[] = {
 147         KUNIT_CASE_PARAM(xrgb8888_to_rgb332_test,
 148                          xrgb8888_to_rgb332_gen_params),
 149         {}
 150 };
 151
 152 static struct kunit_suite drm_format_helper_test_suite = {
 153         .name = "drm_format_helper_test",
 154         .test_cases = drm_format_helper_test_cases,
 155 };
 156
 157 kunit_test_suite(drm_format_helper_test_suite);
 158
 159 MODULE_DESCRIPTION("KUnit tests for the drm_format_helper APIs");
 160 MODULE_LICENSE("GPL");
 161 MODULE_AUTHOR("José Expósito <[email protected]>");