> -----Original Message-----
> From: Intel-gfx <intel-gfx-boun...@lists.freedesktop.org> On Behalf Of Ville
> Syrjala
> Sent: Monday, November 14, 2022 9:07 PM
> To: intel-gfx@lists.freedesktop.org
> Subject: [Intel-gfx] [PATCH v3 13/20] drm/i915: Prep for C8 palette readout
>
> From: Ville Syrjälä <ville.syrj...@linux.intel.com>
>
> Add the approproate c8_planes checks to make the LUT code ready for C8 palette
> readout. Note we currently lack the actual c8_planes readout, so this won't
> work
> yet. But no harm in making the code somewhat more ready for the day when we do
> get c8_planes readout.
Looks Good to me.
Reviewed-by: Uma Shankar <uma.shan...@intel.com>
> Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
> ---
> drivers/gpu/drm/i915/display/intel_color.c | 22 ++++++++++++++--------
> 1 file changed, 14 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_color.c
> b/drivers/gpu/drm/i915/display/intel_color.c
> index ef171837ef45..ca01b3e6b585 100644
> --- a/drivers/gpu/drm/i915/display/intel_color.c
> +++ b/drivers/gpu/drm/i915/display/intel_color.c
> @@ -1801,7 +1801,7 @@ static int icl_color_check(struct intel_crtc_state
> *crtc_state)
>
> static int i9xx_post_csc_lut_precision(const struct intel_crtc_state
> *crtc_state) {
> - if (!crtc_state->gamma_enable)
> + if (!crtc_state->gamma_enable && !crtc_state->c8_planes)
> return 0;
>
> switch (crtc_state->gamma_mode) {
> @@ -1817,6 +1817,9 @@ static int i9xx_post_csc_lut_precision(const struct
> intel_crtc_state *crtc_state
>
> static bool ilk_has_post_csc_lut(const struct intel_crtc_state *crtc_state)
> {
> + if (crtc_state->c8_planes)
> + return true;
> +
> return crtc_state->gamma_enable &&
> (crtc_state->csc_mode & CSC_POSITION_BEFORE_GAMMA) != 0; }
> @@ -1847,7 +1850,7 @@ static int chv_post_csc_lut_precision(const struct
> intel_crtc_state *crtc_state)
>
> static int glk_post_csc_lut_precision(const struct intel_crtc_state
> *crtc_state) {
> - if (!crtc_state->gamma_enable)
> + if (!crtc_state->gamma_enable && !crtc_state->c8_planes)
> return 0;
>
> switch (crtc_state->gamma_mode) {
> @@ -1863,6 +1866,9 @@ static int glk_post_csc_lut_precision(const struct
> intel_crtc_state *crtc_state)
>
> static bool icl_has_post_csc_lut(const struct intel_crtc_state *crtc_state)
> {
> + if (crtc_state->c8_planes)
> + return true;
> +
> return crtc_state->gamma_mode & POST_CSC_GAMMA_ENABLE; }
>
> @@ -2009,7 +2015,7 @@ static void i9xx_read_luts(struct intel_crtc_state
> *crtc_state) {
> struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
>
> - if (!crtc_state->gamma_enable)
> + if (!crtc_state->gamma_enable && !crtc_state->c8_planes)
> return;
>
> crtc_state->post_csc_lut = i9xx_read_lut_8(crtc); @@ -2049,7 +2055,7 @@
> static void i965_read_luts(struct intel_crtc_state *crtc_state) {
> struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
>
> - if (!crtc_state->gamma_enable)
> + if (!crtc_state->gamma_enable && !crtc_state->c8_planes)
> return;
>
> if (crtc_state->gamma_mode == GAMMA_MODE_MODE_8BIT) @@ -2180,7
> +2186,7 @@ static void ilk_read_luts(struct intel_crtc_state *crtc_state)
> ilk_has_post_csc_lut(crtc_state) ?
> &crtc_state->post_csc_lut : &crtc_state->pre_csc_lut;
>
> - if (!crtc_state->gamma_enable)
> + if (!crtc_state->gamma_enable && !crtc_state->c8_planes)
> return;
>
> switch (crtc_state->gamma_mode) {
> @@ -2240,7 +2246,7 @@ static void ivb_read_luts(struct intel_crtc_state
> *crtc_state)
> ilk_has_post_csc_lut(crtc_state) ?
> &crtc_state->post_csc_lut : &crtc_state->pre_csc_lut;
>
> - if (!crtc_state->gamma_enable)
> + if (!crtc_state->gamma_enable && !crtc_state->c8_planes)
> return;
>
> switch (crtc_state->gamma_mode) {
> @@ -2303,7 +2309,7 @@ static void bdw_read_luts(struct intel_crtc_state
> *crtc_state)
> ilk_has_post_csc_lut(crtc_state) ?
> &crtc_state->post_csc_lut : &crtc_state->pre_csc_lut;
>
> - if (!crtc_state->gamma_enable)
> + if (!crtc_state->gamma_enable && !crtc_state->c8_planes)
> return;
>
> switch (crtc_state->gamma_mode) {
> @@ -2372,7 +2378,7 @@ static void glk_read_luts(struct intel_crtc_state
> *crtc_state)
> if (crtc_state->csc_enable)
> crtc_state->pre_csc_lut = glk_read_degamma_lut(crtc);
>
> - if (!crtc_state->gamma_enable)
> + if (!crtc_state->gamma_enable && !crtc_state->c8_planes)
> return;
>
> switch (crtc_state->gamma_mode) {
> --
> 2.37.4
