add mode_valid function, we can make sure the resolution is valid.
Signed-off-by: Tian Tao <tiant...@hisilicon.com>
Signed-off-by: Gong junjie <gongjunj...@huawei.com>
Reviewed-by: Thomas Zimmermann <tzimmerm...@suse.de>
---
v2: declare hibmc_crtc_mode_valid as static.
Modify the return value of hibmc_crtc_mode_valid .
---
drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c
b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c
index 843d784..675d629 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c
@@ -242,6 +242,24 @@ 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;
@@ -510,6 +528,7 @@ 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)
--
2.7.4
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