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Fri, 29 Jan 2021 00:49:41 -0800 Received: from MTKMBS31N2.mediatek.inc (172.27.4.87) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 29 Jan 2021 00:40:46 -0800 Received: from mtkcas07.mediatek.inc (172.21.101.84) by MTKMBS31N2.mediatek.inc (172.27.4.87) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 29 Jan 2021 16:40:42 +0800 Received: from [172.21.77.4] (172.21.77.4) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Fri, 29 Jan 2021 16:40:42 +0800 Message-ID: <1611909641.31184.11.camel@mtksdaap41> Subject: Re: [PATCH v4 6/8] drm/mediatek: add matrix bits private data for ccorr From: CK Hu To: Hsin-Yi Wang Date: Fri, 29 Jan 2021 16:40:41 +0800 In-Reply-To: <20210129073436.2429834-7-hsinyi@chromium.org> References: <20210129073436.2429834-1-hsinyi@chromium.org> <20210129073436.2429834-7-hsinyi@chromium.org> X-Mailer: Evolution 3.10.4-0ubuntu2 MIME-Version: 1.0 X-TM-SNTS-SMTP: 07838E2DF8FE698C3E994C67D0C67BE09B3C9FAC28E56910A68D922798B518752000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210129_034945_015621_4DC701F6 X-CRM114-Status: GOOD ( 19.53 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, Philipp Zabel , David Airlie , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Yongqiang Niu , linux-mediatek@lists.infradead.org, Daniel Vetter , Matthias Brugger , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi, Hsin-Yi: On Fri, 2021-01-29 at 15:34 +0800, Hsin-Yi Wang wrote: > From: Yongqiang Niu > > matrix bits of mt8183 is 12 > matrix bits of mt8192 is 13 > > Signed-off-by: Yongqiang Niu > Signed-off-by: Hsin-Yi Wang > --- > drivers/gpu/drm/mediatek/mtk_disp_ccorr.c | 22 +++++++++++++++++++--- > 1 file changed, 19 insertions(+), 3 deletions(-) > > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ccorr.c b/drivers/gpu/drm/mediatek/mtk_disp_ccorr.c > index 0c68090eb1e92..1c7163a12f3b1 100644 > --- a/drivers/gpu/drm/mediatek/mtk_disp_ccorr.c > +++ b/drivers/gpu/drm/mediatek/mtk_disp_ccorr.c > @@ -31,8 +31,10 @@ > #define DISP_CCORR_COEF_3 0x008C > #define DISP_CCORR_COEF_4 0x0090 > > +#define CCORR_MATRIX_BITS 12 > + > struct mtk_disp_ccorr_data { > - u32 reserved; > + u32 matrix_bits; > }; > > /** > @@ -116,6 +118,7 @@ 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; > @@ -123,8 +126,16 @@ void mtk_ccorr_ctm_set(struct device *dev, struct drm_crtc_state *state) > ctm = (struct drm_color_ctm *)blob->data; > input = ctm->matrix; > > - for (i = 0; i < ARRAY_SIZE(coeffs); i++) > + if (ccorr->data) > + 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]); > + if (matrix_bits > CCORR_MATRIX_BITS) > + coeffs[i] <<= (matrix_bits - CCORR_MATRIX_BITS); I think format of MT8192 ccorr coeffs is s1.11, after mtk_ctm_s31_32_to_s1_10(), you lose one bit precision. So modify mtk_ctm_s31_32_to_s1_10() to get maximum precision. Regards, CK > + } > > mtk_ddp_write(cmdq_pkt, coeffs[0] << 16 | coeffs[1], > &ccorr->cmdq_reg, ccorr->regs, DISP_CCORR_COEF_0); > @@ -205,8 +216,13 @@ 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, > +}; > + > 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); _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel