Hi, Hsin-Yi:
On Mon, 2021-02-01 at 18:37 +0800, Hsin-Yi Wang wrote:
> From: Yongqiang Niu <yongqiang.niu@xxxxxxxxxxxx>
>
> Add matrix_bits and coeffs_precision to ccorr private data:
> - matrix bits of mt8183 is 10
> - matrix bits of mt8192 is 11
>
> Signed-off-by: Yongqiang Niu <yongqiang.niu@xxxxxxxxxxxx>
> Signed-off-by: Hsin-Yi Wang <hsinyi@xxxxxxxxxxxx>
> ---
> drivers/gpu/drm/mediatek/mtk_disp_ccorr.c | 34 ++++++++++++++++-------
> 1 file changed, 24 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ccorr.c b/drivers/gpu/drm/mediatek/mtk_disp_ccorr.c
> index 6c86673a835c3..fb86f3a8b3a18 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_ccorr.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_ccorr.c
> @@ -29,8 +29,10 @@
> #define DISP_CCORR_COEF_3 0x008C
> #define DISP_CCORR_COEF_4 0x0090
>
> +#define CCORR_MATRIX_BITS 10
> +
> struct mtk_disp_ccorr_data {
> - u32 reserved;
> + u32 matrix_bits;
> };
>
> /**
> @@ -85,21 +87,22 @@ void mtk_ccorr_stop(struct device *dev)
> writel_relaxed(0x0, ccorr->regs + DISP_CCORR_EN);
> }
>
> -/* Converts a DRM S31.32 value to the HW S1.10 format. */
> -static u16 mtk_ctm_s31_32_to_s1_10(u64 in)
> +/* Converts a DRM S31.32 value to the HW S1.n format. */
> +static u16 mtk_ctm_s31_32_to_s1_n(u64 in, u32 n)
> {
> u16 r;
>
> /* Sign bit. */
> - r = in & BIT_ULL(63) ? BIT(11) : 0;
> + r = in & BIT_ULL(63) ? BIT(n + 1) : 0;
>
> if ((in & GENMASK_ULL(62, 33)) > 0) {
> - /* identity value 0x100000000 -> 0x400, */
> + /* identity value 0x100000000 -> 0x400(mt8183), */
> + /* identity value 0x100000000 -> 0x800(mt8192), */
> /* if bigger this, set it to max 0x7ff. */
> - r |= GENMASK(10, 0);
> + r |= GENMASK(n, 0);
> } else {
> - /* take the 11 most important bits. */
> - r |= (in >> 22) & GENMASK(10, 0);
> + /* take the n+1 most important bits. */
> + r |= (in >> (32 - n)) & GENMASK(n, 0);
> }
>
> return r;
> @@ -114,6 +117,7 @@ void mtk_ccorr_ctm_set(struct device *dev, struct drm_crtc_state *state)
> uint16_t coeffs[9] = { 0 };
> int i;
> struct cmdq_pkt *cmdq_pkt = NULL;
> + u32 matrix_bits;
>
> if (!blob)
> return;
> @@ -121,8 +125,13 @@ void mtk_ccorr_ctm_set(struct device *dev, struct drm_crtc_state *state)
> ctm = (struct drm_color_ctm *)blob->data;
> input = ctm->matrix;
>
> + if (ccorr->data)
ccorr->data is always true, isn't it?
> + matrix_bits = ccorr->data->matrix_bits;
> + else
> + matrix_bits = CCORR_MATRIX_BITS;
> +
> for (i = 0; i < ARRAY_SIZE(coeffs); i++)
> - coeffs[i] = mtk_ctm_s31_32_to_s1_10(input[i]);
> + coeffs[i] = mtk_ctm_s31_32_to_s1_n(input[i], matrix_bits);
>
> mtk_ddp_write(cmdq_pkt, coeffs[0] << 16 | coeffs[1],
> &ccorr->cmdq_reg, ccorr->regs, DISP_CCORR_COEF_0);
> @@ -199,8 +208,13 @@ static int mtk_disp_ccorr_remove(struct platform_device *pdev)
> return 0;
> }
>
> +static const struct mtk_disp_ccorr_data mt8183_ccorr_driver_data = {
> + .matrix_bits = CCORR_MATRIX_BITS,
Drop CCORR_MATRIX_BITS and use 10 here.
> +};
> +
> static const struct of_device_id mtk_disp_ccorr_driver_dt_match[] = {
> - { .compatible = "mediatek,mt8183-disp-ccorr"},
> + { .compatible = "mediatek,mt8183-disp-ccorr",
> + .data = &mt8183_ccorr_driver_data},
> {},
> };
> MODULE_DEVICE_TABLE(of, mtk_disp_ccorr_driver_dt_match);
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