drm/sun4i: add lvds mode_valid function
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
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@ -94,9 +94,64 @@ static void sun4i_lvds_encoder_disable(struct drm_encoder *encoder)
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}
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}
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static enum drm_mode_status sun4i_lvds_encoder_mode_valid(struct drm_encoder *crtc,
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const struct drm_display_mode *mode)
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{
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struct sun4i_lvds *lvds = drm_encoder_to_sun4i_lvds(crtc);
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struct sun4i_tcon *tcon = lvds->tcon;
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u32 hsync = mode->hsync_end - mode->hsync_start;
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u32 vsync = mode->vsync_end - mode->vsync_start;
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unsigned long rate = mode->clock * 1000;
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long rounded_rate;
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DRM_DEBUG_DRIVER("Validating modes...\n");
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if (hsync < 1)
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return MODE_HSYNC_NARROW;
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if (hsync > 0x3ff)
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return MODE_HSYNC_WIDE;
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if ((mode->hdisplay < 1) || (mode->htotal < 1))
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return MODE_H_ILLEGAL;
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if ((mode->hdisplay > 0x7ff) || (mode->htotal > 0xfff))
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return MODE_BAD_HVALUE;
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DRM_DEBUG_DRIVER("Horizontal parameters OK\n");
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if (vsync < 1)
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return MODE_VSYNC_NARROW;
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if (vsync > 0x3ff)
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return MODE_VSYNC_WIDE;
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if ((mode->vdisplay < 1) || (mode->vtotal < 1))
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return MODE_V_ILLEGAL;
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if ((mode->vdisplay > 0x7ff) || (mode->vtotal > 0xfff))
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return MODE_BAD_VVALUE;
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DRM_DEBUG_DRIVER("Vertical parameters OK\n");
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tcon->dclk_min_div = 7;
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tcon->dclk_max_div = 7;
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rounded_rate = clk_round_rate(tcon->dclk, rate);
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if (rounded_rate < rate)
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return MODE_CLOCK_LOW;
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if (rounded_rate > rate)
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return MODE_CLOCK_HIGH;
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DRM_DEBUG_DRIVER("Clock rate OK\n");
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return MODE_OK;
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}
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static const struct drm_encoder_helper_funcs sun4i_lvds_enc_helper_funcs = {
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.disable = sun4i_lvds_encoder_disable,
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.enable = sun4i_lvds_encoder_enable,
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.mode_valid = sun4i_lvds_encoder_mode_valid,
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};
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static const struct drm_encoder_funcs sun4i_lvds_enc_funcs = {
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