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drm/sun4i: add lvds mode_valid function

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mode_valid function is missing for lvds.

Add it making it pointed by encoder helper functions.

Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1520940019-68977-1-git-send-email-giulio.benetti@micronovasrl.com
This commit is contained in:
Giulio Benetti 2018-03-13 12:20:19 +01:00 committed by Maxime Ripard
parent cde8b75482
commit e4e4b7ad50
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GPG key ID: D2B4C094214DAF74
1 changed files with 55 additions and 0 deletions
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55
drivers/gpu/drm/sun4i/sun4i_lvds.c
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@ -94,9 +94,64 @@ static void sun4i_lvds_encoder_disable(struct drm_encoder *encoder)
}
}
static enum drm_mode_status sun4i_lvds_encoder_mode_valid(struct drm_encoder *crtc,
const struct drm_display_mode *mode)
{
struct sun4i_lvds *lvds = drm_encoder_to_sun4i_lvds(crtc);
struct sun4i_tcon *tcon = lvds->tcon;
u32 hsync = mode->hsync_end - mode->hsync_start;
u32 vsync = mode->vsync_end - mode->vsync_start;
unsigned long rate = mode->clock * 1000;
long rounded_rate;
DRM_DEBUG_DRIVER("Validating modes...\n");
if (hsync < 1)
return MODE_HSYNC_NARROW;
if (hsync > 0x3ff)
return MODE_HSYNC_WIDE;
if ((mode->hdisplay < 1) || (mode->htotal < 1))
return MODE_H_ILLEGAL;
if ((mode->hdisplay > 0x7ff) || (mode->htotal > 0xfff))
return MODE_BAD_HVALUE;
DRM_DEBUG_DRIVER("Horizontal parameters OK\n");
if (vsync < 1)
return MODE_VSYNC_NARROW;
if (vsync > 0x3ff)
return MODE_VSYNC_WIDE;
if ((mode->vdisplay < 1) || (mode->vtotal < 1))
return MODE_V_ILLEGAL;
if ((mode->vdisplay > 0x7ff) || (mode->vtotal > 0xfff))
return MODE_BAD_VVALUE;
DRM_DEBUG_DRIVER("Vertical parameters OK\n");
tcon->dclk_min_div = 7;
tcon->dclk_max_div = 7;
rounded_rate = clk_round_rate(tcon->dclk, rate);
if (rounded_rate < rate)
return MODE_CLOCK_LOW;
if (rounded_rate > rate)
return MODE_CLOCK_HIGH;
DRM_DEBUG_DRIVER("Clock rate OK\n");
return MODE_OK;
}
static const struct drm_encoder_helper_funcs sun4i_lvds_enc_helper_funcs = {
.disable = sun4i_lvds_encoder_disable,
.enable = sun4i_lvds_encoder_enable,
.mode_valid = sun4i_lvds_encoder_mode_valid,
};
static const struct drm_encoder_funcs sun4i_lvds_enc_funcs = {