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Lin" Subject: [PATCH v3 7/9] drm/mediatek: Add gamma lut support for mt8195 Date: Sun, 11 Sep 2022 23:37:32 +0800 Message-ID: <20220911153734.24243-8-jason-jh.lin@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20220911153734.24243-1-jason-jh.lin@mediatek.com> References: <20220911153734.24243-1-jason-jh.lin@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220911_083753_294750_A31CB98D X-CRM114-Status: GOOD ( 16.28 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: "zheng-yan.chen" Since the previous gamma_set_common() function is designed for 9bit-to-10bit conversion, which is not feasible for the 10bit-to-12bit conversion in mt8195. 1. Update the function to fit the need of mt8195. 2. Add gamma driver data for mt8195. Signed-off-by: zheng-yan.chen Signed-off-by: Jason-JH.Lin --- drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 57 ++++++++++++++++------- 1 file changed, 40 insertions(+), 17 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c index 9983318e8e3e..4e67f1503b9a 100644 --- a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c +++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c @@ -23,6 +23,7 @@ #define DISP_GAMMA_SIZE 0x0030 #define DISP_GAMMA_BANK 0x0100 #define DISP_GAMMA_LUT 0x0700 +#define DISP_GAMMA_LUT1 0x0b00 #define LUT_10BIT_MASK 0x03ff #define LUT_SIZE_DEFAULT 512 /* for setting gamma lut from AAL */ @@ -82,9 +83,8 @@ void mtk_gamma_set_common(struct device *dev, void __iomem *regs, struct drm_crt u8 shift_bits; unsigned int i, j, reg, bank_num; struct drm_color_lut *lut; - void __iomem *lut_base; - u32 word, mask; - u32 diff[3] = {0}; + void __iomem *lut_base, *lut1_base; + u32 word, word1, mask; if (gamma && gamma->data) { lut_diff = gamma->data->lut_diff; @@ -102,27 +102,41 @@ void mtk_gamma_set_common(struct device *dev, void __iomem *regs, struct drm_crt reg = reg | GAMMA_LUT_EN; writel(reg, regs + DISP_GAMMA_CFG); lut_base = regs + DISP_GAMMA_LUT; + lut1_base = regs + DISP_GAMMA_LUT1; lut = (struct drm_color_lut *)state->gamma_lut->data; for (j = 0; j < bank_num; j++) { writel(j, regs + DISP_GAMMA_BANK); for (i = 0; i < bank_size; i++) { - if (!lut_diff || (i % 2 == 0)) { - word = (((lut[i].red >> shift_bits) & mask) << 20) + - (((lut[i].green >> shift_bits) & mask) << 10) + - ((lut[i].blue >> shift_bits) & mask); + struct drm_color_lut input; + + input.red = (lut[i].red >> shift_bits) & mask; + input.green = (lut[i].green >> shift_bits) & mask; + input.blue = (lut[i].blue >> shift_bits) & mask; + if (!lut_diff || i % 2 == 0) { + word = (lut_bits == 12) ? + (input.red + (input.green << 12)) : + ((input.red << 20) + (input.green << 10) + + input.blue); + word1 = input.blue; } else { - diff[0] = (lut[i].red >> shift_bits) - - (lut[i - 1].red >> shift_bits); - diff[1] = (lut[i].green >> shift_bits) - - (lut[i - 1].green >> shift_bits); - diff[2] = (lut[i].blue >> shift_bits) - - (lut[i - 1].blue >> shift_bits); - - word = ((diff[0] & mask) << 20) + - ((diff[1] & mask) << 10) + - (diff[2] & mask); + struct drm_color_lut diff; + + diff.red = input.red - + ((lut[i - 1].red >> shift_bits) & mask); + diff.green = input.green - + ((lut[i - 1].green >> shift_bits & mask)); + diff.blue = input.blue - + ((lut[i - 1].blue >> shift_bits) & mask); + + word = (lut_bits == 12) ? + (input.red + (input.green << 12)) : + (diff.red << 20) + (diff.green << 10) + diff.blue; + word1 = input.blue; } + writel(word, (lut_base + i * 4)); + if (lut_bits == 12) + writel(word1, (lut1_base + i * 4)); } } } @@ -237,11 +251,20 @@ static const struct mtk_disp_gamma_data mt8183_gamma_driver_data = { .lut_bits = 10, }; +static const struct mtk_disp_gamma_data mt8195_gamma_driver_data = { + .lut_diff = true, + .lut_size = 512, + .lut_bits = 10, + .bank_size = 256, +}; + static const struct of_device_id mtk_disp_gamma_driver_dt_match[] = { { .compatible = "mediatek,mt8173-disp-gamma", .data = &mt8173_gamma_driver_data}, { .compatible = "mediatek,mt8183-disp-gamma", .data = &mt8183_gamma_driver_data}, + { .compatible = "mediatek,mt8195-disp-gamma", + .data = &mt8195_gamma_driver_data}, {}, }; MODULE_DEVICE_TABLE(of, mtk_disp_gamma_driver_dt_match);