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drm/hisilicon: Add the mode_valid function 

add mode_valid function, we can make sure the resolution is valid.

Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Signed-off-by: Gong junjie <gongjunjie2@huawei.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Xinliang Liu <xinliang.liu@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1578476501-45807-1-git-send-email-tiantao6@hisilicon.com
This commit is contained in:
Tian Tao 2020-01-08 17:41:41 +08:00 committed by Xinliang Liu
parent de3c3ed4c8
commit bc17e55749
1 changed files with 20 additions and 0 deletions
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20
drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c
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@ -243,6 +243,25 @@ static void hibmc_crtc_atomic_disable(struct drm_crtc *crtc,
hibmc_set_current_gate(priv, reg);
}
static enum drm_mode_status
hibmc_crtc_mode_valid(struct drm_crtc *crtc,
const struct drm_display_mode *mode)
{
int i = 0;
int vrefresh = drm_mode_vrefresh(mode);
if (vrefresh < 59 || vrefresh > 61)
return MODE_NOCLOCK;
for (i = 0; i < ARRAY_SIZE(hibmc_pll_table); i++) {
if (hibmc_pll_table[i].hdisplay == mode->hdisplay &&
hibmc_pll_table[i].vdisplay == mode->vdisplay)
return MODE_OK;
}
return MODE_BAD;
}
static unsigned int format_pll_reg(void)
{
unsigned int pllreg = 0;
@ -511,6 +530,7 @@ static const struct drm_crtc_helper_funcs hibmc_crtc_helper_funcs = {
.atomic_flush = hibmc_crtc_atomic_flush,
.atomic_enable = hibmc_crtc_atomic_enable,
.atomic_disable = hibmc_crtc_atomic_disable,
.mode_valid = hibmc_crtc_mode_valid,
};
int hibmc_de_init(struct hibmc_drm_private *priv)