[Intel-gfx] [PATCH xf86-video-intel v3 2/2] sna: Support 10bpc gamma via the GAMMA_LUT crtc property

Mario Kleiner mario.kleiner.de at gmail.com
Tue Jul 9 18:34:54 UTC 2019


Hi Ville,

now somebody just needs to merge these two 10 bit gamma lut patches
into intel-ddx?

thanks,
-mario

On Fri, May 17, 2019 at 3:51 PM Ville Syrjala
<ville.syrjala at linux.intel.com> wrote:
>
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
>
> Probe the GAMMA_LUT/GAMMA_LUT_SIZE props and utilize them when
> the running with > 8bpc.
>
> v2: s/sna_crtc_id/__sna_crtc_id/ in DBG since we have a sna_crtc
> v3: Fix the vg "bluered" typo (Mario)
>     This time I even build tested with vg support
>
> Cc: Mario Kleiner <mario.kleiner.de at gmail.com>
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> Reviewed-and-tested-by: Mario Kleiner <mario.kleiner.de at gmail.com>
> ---
>  src/sna/sna_display.c | 247 +++++++++++++++++++++++++++++++++++-------
>  1 file changed, 208 insertions(+), 39 deletions(-)
>
> diff --git a/src/sna/sna_display.c b/src/sna/sna_display.c
> index 41edfec12839..d6210cc7bbc8 100644
> --- a/src/sna/sna_display.c
> +++ b/src/sna/sna_display.c
> @@ -127,6 +127,7 @@ struct local_mode_obj_get_properties {
>         uint32_t obj_type;
>         uint32_t pad;
>  };
> +#define LOCAL_MODE_OBJECT_CRTC 0xcccccccc
>  #define LOCAL_MODE_OBJECT_PLANE 0xeeeeeeee
>
>  struct local_mode_set_plane {
> @@ -229,6 +230,11 @@ struct sna_crtc {
>         } primary;
>         struct list sprites;
>
> +       struct drm_color_lut *gamma_lut;
> +       uint64_t gamma_lut_prop;
> +       uint64_t gamma_lut_blob;
> +       uint32_t gamma_lut_size;
> +
>         uint32_t mode_serial, flip_serial;
>
>         uint32_t last_seq, wrap_seq;
> @@ -317,6 +323,9 @@ static void __sna_output_dpms(xf86OutputPtr output, int dpms, int fixup);
>  static void sna_crtc_disable_cursor(struct sna *sna, struct sna_crtc *crtc);
>  static bool sna_crtc_flip(struct sna *sna, struct sna_crtc *crtc,
>                           struct kgem_bo *bo, int x, int y);
> +static void sna_crtc_gamma_set(xf86CrtcPtr crtc,
> +                              CARD16 *red, CARD16 *green,
> +                              CARD16 *blue, int size);
>
>  static bool is_zaphod(ScrnInfoPtr scrn)
>  {
> @@ -3150,11 +3159,9 @@ sna_crtc_set_mode_major(xf86CrtcPtr crtc, DisplayModePtr mode,
>                mode->VDisplay <= sna->mode.max_crtc_height);
>
>  #if HAS_GAMMA
> -       drmModeCrtcSetGamma(sna->kgem.fd, __sna_crtc_id(sna_crtc),
> -                           crtc->gamma_size,
> -                           crtc->gamma_red,
> -                           crtc->gamma_green,
> -                           crtc->gamma_blue);
> +       sna_crtc_gamma_set(crtc,
> +                          crtc->gamma_red, crtc->gamma_green,
> +                          crtc->gamma_blue, crtc->gamma_size);
>  #endif
>
>         saved_kmode = sna_crtc->kmode;
> @@ -3212,12 +3219,44 @@ void sna_mode_adjust_frame(struct sna *sna, int x, int y)
>
>  static void
>  sna_crtc_gamma_set(xf86CrtcPtr crtc,
> -                      CARD16 *red, CARD16 *green, CARD16 *blue, int size)
> +                  CARD16 *red, CARD16 *green, CARD16 *blue, int size)
>  {
> -       assert(to_sna_crtc(crtc));
> -       drmModeCrtcSetGamma(to_sna(crtc->scrn)->kgem.fd,
> -                           sna_crtc_id(crtc),
> -                           size, red, green, blue);
> +       struct sna *sna = to_sna(crtc->scrn);
> +       struct sna_crtc *sna_crtc = to_sna_crtc(crtc);
> +       struct drm_color_lut *lut = sna_crtc->gamma_lut;
> +       uint32_t blob_size = size * sizeof(lut[0]);
> +       uint32_t blob_id;
> +       int ret, i;
> +
> +       DBG(("%s: gamma_size %d\n", __FUNCTION__, size));
> +
> +       if (!lut) {
> +               assert(size == 256);
> +
> +               drmModeCrtcSetGamma(to_sna(crtc->scrn)->kgem.fd,
> +                                   sna_crtc_id(crtc),
> +                                   size, red, green, blue);
> +               return;
> +       }
> +
> +       assert(size == sna_crtc->gamma_lut_size);
> +
> +       for (i = 0; i < size; i++) {
> +               lut[i].red = red[i];
> +               lut[i].green = green[i];
> +               lut[i].blue = blue[i];
> +       }
> +
> +       ret = drmModeCreatePropertyBlob(sna->kgem.fd, lut, blob_size, &blob_id);
> +       if (ret)
> +               return;
> +
> +       ret = drmModeObjectSetProperty(sna->kgem.fd,
> +                                      sna_crtc->id, DRM_MODE_OBJECT_CRTC,
> +                                      sna_crtc->gamma_lut_prop,
> +                                      blob_id);
> +
> +       drmModeDestroyPropertyBlob(sna->kgem.fd, blob_id);
>  }
>
>  static void
> @@ -3229,6 +3268,8 @@ sna_crtc_destroy(xf86CrtcPtr crtc)
>         if (sna_crtc == NULL)
>                 return;
>
> +       free(sna_crtc->gamma_lut);
> +
>         list_for_each_entry_safe(sprite, sn, &sna_crtc->sprites, link)
>                 free(sprite);
>
> @@ -3663,6 +3704,55 @@ bool sna_has_sprite_format(struct sna *sna, uint32_t format)
>         return false;
>  }
>
> +inline static bool prop_is_gamma_lut(const struct drm_mode_get_property *prop)
> +{
> +       return prop_has_type_and_name(prop, 4, "GAMMA_LUT");
> +}
> +
> +inline static bool prop_is_gamma_lut_size(const struct drm_mode_get_property *prop)
> +{
> +       return prop_has_type_and_name(prop, 1, "GAMMA_LUT_SIZE");
> +}
> +
> +static void sna_crtc_parse_prop(struct sna *sna,
> +                               struct drm_mode_get_property *prop,
> +                               uint64_t value, void *data)
> +{
> +       struct sna_crtc *crtc = data;
> +
> +       if (prop_is_gamma_lut(prop)) {
> +               crtc->gamma_lut_prop = prop->prop_id;
> +               crtc->gamma_lut_blob = value;
> +       } else if (prop_is_gamma_lut_size(prop)) {
> +               crtc->gamma_lut_size = value;
> +       }
> +}
> +
> +static void
> +sna_crtc_init__props(struct sna *sna, struct sna_crtc *crtc)
> +{
> +       ScrnInfoPtr scrn = sna->scrn;
> +
> +       parse_props(sna, LOCAL_MODE_OBJECT_CRTC, crtc->id,
> +                   sna_crtc_parse_prop, crtc);
> +
> +       /* use high precision gamma LUT for > 8bpc */
> +       /* X-Server < 1.20 mishandles > 256 slots / > 8 bpc color maps. */
> +       if (scrn->rgbBits <= 8 ||
> +           XORG_VERSION_CURRENT < XORG_VERSION_NUMERIC(1,20,0,0,0))
> +               crtc->gamma_lut_size = 0;
> +
> +       if (crtc->gamma_lut_size) {
> +               crtc->gamma_lut = calloc(max(crtc->gamma_lut_size, 256),
> +                                        sizeof(crtc->gamma_lut[0]));
> +               if (!crtc->gamma_lut)
> +                       crtc->gamma_lut_size = 0;
> +       }
> +
> +       DBG(("%s: CRTC:%d, gamma_lut_size=%d\n", __FUNCTION__,
> +            __sna_crtc_id(crtc), crtc->gamma_lut_size));
> +}
> +
>  static void
>  sna_crtc_init__rotation(struct sna *sna, struct sna_crtc *crtc)
>  {
> @@ -3723,6 +3813,9 @@ sna_crtc_add(ScrnInfoPtr scrn, unsigned id)
>
>         list_init(&sna_crtc->sprites);
>         sna_crtc_init__rotation(sna, sna_crtc);
> +
> +       sna_crtc_init__props(sna, sna_crtc);
> +
>         sna_crtc_find_planes(sna, sna_crtc);
>
>         DBG(("%s: CRTC:%d [pipe=%d], primary id=%x: supported-rotations=%x, current-rotation=%x\n",
> @@ -7274,36 +7367,110 @@ static void output_set_gamma(xf86OutputPtr output, xf86CrtcPtr crtc)
>                           mon->mon_gamma_blue);
>  }
>
> +static bool
> +crtc_get_gamma_lut(xf86CrtcPtr crtc,
> +                  CARD16 *red, CARD16 *green, CARD16 *blue, int size)
> +{
> +
> +       struct sna *sna = to_sna(crtc->scrn);
> +       struct sna_crtc *sna_crtc = to_sna_crtc(crtc);
> +       struct drm_color_lut *lut = sna_crtc->gamma_lut;
> +       struct drm_mode_get_blob blob;
> +       int lut_size, i;
> +
> +       DBG(("%s: gamma_size %d\n", __FUNCTION__, size));
> +
> +       memset(&blob, 0, sizeof(blob));
> +       blob.blob_id = sna_crtc->gamma_lut_blob;
> +
> +       if (drmIoctl(sna->kgem.fd, DRM_IOCTL_MODE_GETPROPBLOB, &blob))
> +               return false;
> +
> +       lut_size = blob.length / sizeof(lut[0]);
> +
> +       if (lut_size == 0 ||
> +           lut_size > max(sna_crtc->gamma_lut_size, 256))
> +               return false;
> +
> +       blob.data = (uintptr_t)lut;
> +
> +       if (drmIoctl(sna->kgem.fd, DRM_IOCTL_MODE_GETPROPBLOB, &blob))
> +               return false;
> +
> +       for (i = 0; i < size; i++) {
> +               struct drm_color_lut *entry =
> +                       &lut[i * (lut_size - 1) / (size - 1)];
> +
> +               red[i] = entry->red;
> +               green[i] = entry->green;
> +               blue[i] = entry->blue;
> +       }
> +
> +       return red[size - 1] &&
> +               green[size - 1] &&
> +               blue[size - 1];
> +}
> +
> +static bool crtc_get_gamma_legacy(xf86CrtcPtr crtc,
> +                                 CARD16 *red,
> +                                 CARD16 *green,
> +                                 CARD16 *blue,
> +                                 int size)
> +{
> +       struct sna *sna = to_sna(crtc->scrn);
> +       struct sna_crtc *sna_crtc = to_sna_crtc(crtc);
> +       struct drm_mode_crtc_lut lut = {
> +               .crtc_id = __sna_crtc_id(sna_crtc),
> +               .gamma_size = size,
> +               .red = (uintptr_t)red,
> +               .green = (uintptr_t)green,
> +               .blue = (uintptr_t)blue,
> +       };
> +
> +       if (drmIoctl(sna->kgem.fd, DRM_IOCTL_MODE_GETGAMMA, &lut) != 0)
> +               return false;
> +
> +       VG(VALGRIND_MAKE_MEM_DEFINED(red, size*sizeof(red[0])));
> +       VG(VALGRIND_MAKE_MEM_DEFINED(green, size*sizeof(green[0])));
> +       VG(VALGRIND_MAKE_MEM_DEFINED(blue, size*sizeof(blue[0])));
> +
> +       return red[size - 1] &&
> +               green[size - 1] &&
> +               blue[size - 1];
> +}
> +
>  static void crtc_init_gamma(xf86CrtcPtr crtc)
>  {
> +       struct sna *sna = to_sna(crtc->scrn);
> +       struct sna_crtc *sna_crtc = to_sna_crtc(crtc);
>         uint16_t *gamma;
> +       int size;
> +
> +       assert(sna_crtc);
> +
> +       size = sna_crtc->gamma_lut_size;
> +       if (!size)
> +               size = 256;
>
>         /* Initialize the gamma ramps */
>         gamma = NULL;
> -       if (crtc->gamma_size == 256)
> +       if (crtc->gamma_size == size)
>                 gamma = crtc->gamma_red;
>         if (gamma == NULL)
> -               gamma = malloc(3 * 256 * sizeof(uint16_t));
> +               gamma = malloc(3 * size * sizeof(uint16_t));
>         if (gamma) {
> -               struct sna *sna = to_sna(crtc->scrn);
> -               struct sna_crtc *sna_crtc = to_sna_crtc(crtc);
>                 struct drm_mode_crtc_lut lut;
> -               bool gamma_set = false;
> -
> -               assert(sna_crtc);
> -
> -               lut.crtc_id = __sna_crtc_id(sna_crtc);
> -               lut.gamma_size = 256;
> -               lut.red = (uintptr_t)(gamma);
> -               lut.green = (uintptr_t)(gamma + 256);
> -               lut.blue = (uintptr_t)(gamma + 2 * 256);
> -               if (drmIoctl(sna->kgem.fd, DRM_IOCTL_MODE_GETGAMMA, &lut) == 0) {
> -                       VG(VALGRIND_MAKE_MEM_DEFINED(gamma, 3*256*sizeof(gamma[0])));
> -                       gamma_set =
> -                               gamma[256 - 1] &&
> -                               gamma[2*256 - 1] &&
> -                               gamma[3*256 - 1];
> -               }
> +               bool gamma_set;
> +               uint16_t *red = gamma;
> +               uint16_t *green = gamma + size;
> +               uint16_t *blue = gamma + 2 * size;
> +
> +               if (sna_crtc->gamma_lut_size)
> +                       gamma_set = crtc_get_gamma_lut(crtc, red,
> +                                                      green, blue, size);
> +               else
> +                       gamma_set = crtc_get_gamma_legacy(crtc, red,
> +                                                         green, blue, size);
>
>                 DBG(("%s: CRTC:%d, pipe=%d: gamma set?=%d\n",
>                      __FUNCTION__, __sna_crtc_id(sna_crtc), __sna_crtc_pipe(sna_crtc),
> @@ -7311,19 +7478,21 @@ static void crtc_init_gamma(xf86CrtcPtr crtc)
>                 if (!gamma_set) {
>                         int i;
>
> -                       for (i = 0; i < 256; i++) {
> -                               gamma[i] = i << 8;
> -                               gamma[256 + i] = i << 8;
> -                               gamma[2*256 + i] = i << 8;
> +                       for (i = 0; i < size; i++) {
> +                               uint16_t val = i * 0xffff / (size - 1);
> +
> +                               red[i] = val;
> +                               green[i] = val;
> +                               blue[i] = val;
>                         }
>                 }
>
> -               if (gamma != crtc->gamma_red) {
> +               if (red != crtc->gamma_red) {
>                         free(crtc->gamma_red);
> -                       crtc->gamma_red = gamma;
> -                       crtc->gamma_green = gamma + 256;
> -                       crtc->gamma_blue = gamma + 2*256;
> -                       crtc->gamma_size = 256;
> +                       crtc->gamma_red = red;
> +                       crtc->gamma_green = green;
> +                       crtc->gamma_blue = blue;
> +                       crtc->gamma_size = size;
>                 }
>         }
>  }
> --
> 2.21.0
>


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