On Thu, 2019-03-28 at 23:05 +0200, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
>
> i965+ have an interpolate 10bit LUT mode. Let's expose that so
> that we can actually enjoy real 10bpc.
>
> Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
LGTM
Reviewed-by: Radhakrishna Sripada <radhakrishna.sripada@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_pci.c | 6 +++
> drivers/gpu/drm/i915/i915_reg.h | 4 ++
> drivers/gpu/drm/i915/intel_color.c | 62
> +++++++++++++++++++++++++++++-
> 3 files changed, 71 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_pci.c
> b/drivers/gpu/drm/i915/i915_pci.c
> index 0971eee4a4d1..0c5258aa13bb 100644
> --- a/drivers/gpu/drm/i915/i915_pci.c
> +++ b/drivers/gpu/drm/i915/i915_pci.c
> @@ -116,6 +116,10 @@
> [PIPE_C] = IVB_CURSOR_C_OFFSET, \
> }
>
> +#define I965_COLORS \
> + .color = { .gamma_lut_size = 129, \
> + .gamma_lut_tests = DRM_COLOR_LUT_NON_DECREASING, \
> + }
> #define ILK_COLORS \
> .color = { .gamma_lut_size = 1024 }
> #define IVB_COLORS \
> @@ -278,6 +282,7 @@ static const struct intel_device_info
> intel_pineview_info = {
> .has_coherent_ggtt = true, \
> I9XX_PIPE_OFFSETS, \
> I9XX_CURSOR_OFFSETS, \
> + I965_COLORS, \
> GEN_DEFAULT_PAGE_SIZES
>
> static const struct intel_device_info intel_i965g_info = {
> @@ -462,6 +467,7 @@ static const struct intel_device_info
> intel_valleyview_info = {
> .display_mmio_offset = VLV_DISPLAY_BASE,
> I9XX_PIPE_OFFSETS,
> I9XX_CURSOR_OFFSETS,
> + I965_COLORS,
> GEN_DEFAULT_PAGE_SIZES,
> };
>
> diff --git a/drivers/gpu/drm/i915/i915_reg.h
> b/drivers/gpu/drm/i915/i915_reg.h
> index f6a5d8f11368..0437a3ab6cdc 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -5795,6 +5795,10 @@ enum {
> #define PIPEFRAMEPIXEL(pipe) _MMIO_PIPE2(pipe, _PIPEAFRAMEPIXEL)
> #define PIPESTAT(pipe) _MMIO_PIPE2(pipe, _PIPEASTAT)
>
> +#define _PIPEAGCMAX 0x70010
> +#define _PIPEBGCMAX 0x71010
> +#define PIPEGCMAX(pipe, i) _MMIO_PIPE2(pipe, _PIPEAGCMAX + (i) *
> 4)
> +
> #define _PIPE_MISC_A 0x70030
> #define _PIPE_MISC_B 0x71030
> #define PIPEMISC_YUV420_ENABLE (1 << 27)
> diff --git a/drivers/gpu/drm/i915/intel_color.c
> b/drivers/gpu/drm/i915/intel_color.c
> index 8e03f066adf7..07d62c7cb386 100644
> --- a/drivers/gpu/drm/i915/intel_color.c
> +++ b/drivers/gpu/drm/i915/intel_color.c
> @@ -359,6 +359,22 @@ static void cherryview_load_csc_matrix(const
> struct intel_crtc_state *crtc_state
> I915_WRITE(CGM_PIPE_MODE(pipe), crtc_state->cgm_mode);
> }
>
> +/* i965+ "10.6" bit interpolated format "even DW" (low 8 bits) */
> +static u32 i965_lut_10p6_ldw(const struct drm_color_lut *color)
> +{
> + return (color->red & 0xff) << 16 |
> + (color->green & 0xff) << 8 |
> + (color->blue & 0xff);
> +}
> +
> +/* i965+ "10.6" interpolated format "odd DW" (high 8 bits) */
> +static u32 i965_lut_10p6_udw(const struct drm_color_lut *color)
> +{
> + return (color->red >> 8) << 16 |
> + (color->green >> 8) << 8 |
> + (color->blue >> 8);
> +}
> +
> static u32 ilk_lut_10(const struct drm_color_lut *color)
> {
> return drm_color_lut_extract(color->red, 10) << 20 |
> @@ -468,6 +484,37 @@ static void skl_color_commit(const struct
> intel_crtc_state *crtc_state)
> ilk_load_csc_matrix(crtc_state);
> }
>
> +static void i965_load_lut_10p6(struct intel_crtc *crtc,
> + const struct drm_property_blob *blob)
> +{
> + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> + const struct drm_color_lut *lut = blob->data;
> + int i, lut_size = drm_color_lut_size(blob);
> + enum pipe pipe = crtc->pipe;
> +
> + for (i = 0; i < lut_size - 1; i++) {
> + I915_WRITE_FW(PALETTE(pipe, 2 * i + 0),
> + i965_lut_10p6_ldw(&lut[i]));
> + I915_WRITE_FW(PALETTE(pipe, 2 * i + 1),
> + i965_lut_10p6_udw(&lut[i]));
> + }
> +
> + I915_WRITE_FW(PIPEGCMAX(pipe, 0), lut[i].red);
> + I915_WRITE_FW(PIPEGCMAX(pipe, 1), lut[i].green);
> + I915_WRITE_FW(PIPEGCMAX(pipe, 2), lut[i].blue);
> +}
> +
> +static void i965_load_luts(const struct intel_crtc_state
> *crtc_state)
> +{
> + struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
> + const struct drm_property_blob *gamma_lut = crtc_state-
> >base.gamma_lut;
> +
> + if (crtc_state->gamma_mode == GAMMA_MODE_MODE_8BIT)
> + i9xx_load_luts(crtc_state);
> + else
> + i965_load_lut_10p6(crtc, gamma_lut);
> +}
> +
> static void ilk_load_lut_10(struct intel_crtc *crtc,
> const struct drm_property_blob *blob)
> {
> @@ -911,6 +958,15 @@ static int check_luts(const struct
> intel_crtc_state *crtc_state)
> return 0;
> }
>
> +static u32 i9xx_gamma_mode(struct intel_crtc_state *crtc_state)
> +{
> + if (!crtc_state->gamma_enable ||
> + crtc_state_is_legacy_gamma(crtc_state))
> + return GAMMA_MODE_MODE_8BIT;
> + else
> + return GAMMA_MODE_MODE_10BIT; /* i965+ only */
> +}
> +
> static int i9xx_color_check(struct intel_crtc_state *crtc_state)
> {
> int ret;
> @@ -923,7 +979,7 @@ static int i9xx_color_check(struct
> intel_crtc_state *crtc_state)
> crtc_state->base.gamma_lut &&
> !crtc_state->c8_planes;
>
> - crtc_state->gamma_mode = GAMMA_MODE_MODE_8BIT;
> + crtc_state->gamma_mode = i9xx_gamma_mode(crtc_state);
>
> ret = intel_color_add_affected_planes(crtc_state);
> if (ret)
> @@ -1178,6 +1234,10 @@ void intel_color_init(struct intel_crtc *crtc)
> dev_priv->display.color_check =
> chv_color_check;
> dev_priv->display.color_commit =
> i9xx_color_commit;
> dev_priv->display.load_luts =
> cherryview_load_luts;
> + } else if (INTEL_GEN(dev_priv) >= 4) {
> + dev_priv->display.color_check =
> i9xx_color_check;
> + dev_priv->display.color_commit =
> i9xx_color_commit;
> + dev_priv->display.load_luts = i965_load_luts;
> } else {
> dev_priv->display.color_check =
> i9xx_color_check;
> dev_priv->display.color_commit =
> i9xx_color_commit;
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