On Mon, 23 Dec 2019 at 15:50, Zhihui Chen chenzhihui4@huawei.com wrote:
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
Thanks for the patch. Acked-by: Xinliang Liu xinliang.liu@linaro.org Applied to drm-misc-next.
.../gpu/drm/hisilicon/hibmc/hibmc_drm_de.c | 37 +++++++++++++++++++ .../gpu/drm/hisilicon/hibmc/hibmc_drm_regs.h | 5 +++ 2 files changed, 42 insertions(+)
diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c index 24de937c1cb1..f1ce6cb099d0 100644 --- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c @@ -456,6 +456,42 @@ 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, @@ -465,6 +501,7 @@ 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
2.20.1