diff options
| author | Zhihui Chen <chenzhihui4@huawei.com> | 2019-12-23 15:49:10 +0800 |
|---|---|---|
| committer | Xinliang Liu <xinliang.liu@linaro.org> | 2020-02-13 09:52:41 +0000 |
| commit | 2f89f37fe23db793dc9e0d34dcab4f2894b5c170 (patch) | |
| tree | ff586da9492215b2fc894596a9928e4604baa6b0 /drivers/gpu/drm/hisilicon | |
| parent | 5970af8b58aaa082c87042893fa644229d7aa332 (diff) | |
drm/hisilicon/hibmc: add gamma_set function
Add gamma_set function, and we can also use it to adjust the brightness
of the display.
Signed-off-by: Zhihui Chen <chenzhihui4@huawei.com>
Signed-off-by: Xinliang Liu <xinliang.liu@linaro.org>
Acked-by: Xinliang Liu <xinliang.liu@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191223074910.1030-1-chenzhihui4@huawei.com
Diffstat (limited to 'drivers/gpu/drm/hisilicon')
| -rw-r--r-- | drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c | 37 | ||||
| -rw-r--r-- | drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_regs.h | 5 |
2 files changed, 42 insertions, 0 deletions
diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c index c41d8f82e82a..561b398ca93d 100644 --- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c @@ -454,6 +454,42 @@ static void hibmc_crtc_disable_vblank(struct drm_crtc *crtc) priv->mmio + HIBMC_RAW_INTERRUPT_EN); } +static void hibmc_crtc_load_lut(struct drm_crtc *crtc) +{ + struct hibmc_drm_private *priv = crtc->dev->dev_private; + void __iomem *mmio = priv->mmio; + u16 *r, *g, *b; + unsigned int reg; + int i; + + r = crtc->gamma_store; + g = r + crtc->gamma_size; + b = g + crtc->gamma_size; + + for (i = 0; i < crtc->gamma_size; i++) { + unsigned int offset = i << 2; + u8 red = *r++ >> 8; + u8 green = *g++ >> 8; + u8 blue = *b++ >> 8; + u32 rgb = (red << 16) | (green << 8) | blue; + + writel(rgb, mmio + HIBMC_CRT_PALETTE + offset); + } + + reg = readl(priv->mmio + HIBMC_CRT_DISP_CTL); + reg |= HIBMC_FIELD(HIBMC_CTL_DISP_CTL_GAMMA, 1); + writel(reg, priv->mmio + HIBMC_CRT_DISP_CTL); +} + +static int hibmc_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green, + u16 *blue, uint32_t size, + struct drm_modeset_acquire_ctx *ctx) +{ + hibmc_crtc_load_lut(crtc); + + return 0; +} + static const struct drm_crtc_funcs hibmc_crtc_funcs = { .page_flip = drm_atomic_helper_page_flip, .set_config = drm_atomic_helper_set_config, @@ -463,6 +499,7 @@ static const struct drm_crtc_funcs hibmc_crtc_funcs = { .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, .enable_vblank = hibmc_crtc_enable_vblank, .disable_vblank = hibmc_crtc_disable_vblank, + .gamma_set = hibmc_crtc_gamma_set, }; static const struct drm_crtc_helper_funcs hibmc_crtc_helper_funcs = { diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_regs.h b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_regs.h index b9e20cfcfb5a..9b7e85947113 100644 --- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_regs.h +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_regs.h @@ -91,6 +91,9 @@ #define HIBMC_CRT_DISP_CTL_TIMING(x) ((x) << 8) #define HIBMC_CRT_DISP_CTL_TIMING_MASK 0x100 +#define HIBMC_CTL_DISP_CTL_GAMMA(x) ((x) << 3) +#define HIBMC_CTL_DISP_CTL_GAMMA_MASK 0x08 + #define HIBMC_CRT_DISP_CTL_PLANE(x) ((x) << 2) #define HIBMC_CRT_DISP_CTL_PLANE_MASK 4 @@ -193,5 +196,7 @@ #define CRT_PLL2_HS_148MHZ 0xB0CCCCCD #define CRT_PLL2_HS_193MHZ 0xC0872B02 +#define HIBMC_CRT_PALETTE 0x80C00 + #define HIBMC_FIELD(field, value) (field(value) & field##_MASK) #endif |